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Journal articles on the topic 'Noble metal'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 May 2024

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1

Moreno, Norberto, Albeiro Restrepo, and C. Z. Hadad. "Exotic species with explicit noble metal–noble gas–noble metal linkages." Physical Chemistry Chemical Physics 20, no. 7 (2018): 5036–45. http://dx.doi.org/10.1039/c7cp08085a.

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2

Mitropoulos, Alexander, F. Burpo, Chi Nguyen, Enoch Nagelli, Madeline Ryu, Jenny Wang, R. Sims, Kamil Woronowicz, and J. Wickiser. "Noble Metal Composite Porous Silk Fibroin Aerogel Fibers." Materials 12, no. 6 (March 18, 2019): 894. http://dx.doi.org/10.3390/ma12060894.

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Nobel metal composite aerogel fibers made from flexible and porous biopolymers offer a wide range of applications, such as in catalysis and sensing, by functionalizing the nanostructure. However, producing these composite aerogels in a defined shape is challenging for many protein-based biopolymers, especially ones that are not fibrous proteins. Here, we present the synthesis of silk fibroin composite aerogel fibers up to 2 cm in length and a diameter of ~300 μm decorated with noble metal nanoparticles. Lyophilized silk fibroin dissolved in hexafluoro-2-propanol (HFIP) was cast in silicon tubes and physically crosslinked with ethanol to produce porous silk gels. Composite silk aerogel fibers with noble metals were created by equilibrating the gels in noble metal salt solutions reduced with sodium borohydride, followed by supercritical drying. These porous aerogel fibers provide a platform for incorporating noble metals into silk fibroin materials, while also providing a new method to produce porous silk fibers. Noble metal silk aerogel fibers can be used for biological sensing and energy storage applications.
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3

Wang, Hengjia, Qie Fang, Wenling Gu, Dan Du, Yuehe Lin, and Chengzhou Zhu. "Noble Metal Aerogels." ACS Applied Materials & Interfaces 12, no. 47 (November 11, 2020): 52234–50. http://dx.doi.org/10.1021/acsami.0c14007.

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4

Zemskov, S. V., V. A. Shcipachev, and V. N. Mitkin. "Noble metal fluorides." Journal of Fluorine Chemistry 35, no. 1 (February 1987): 102. http://dx.doi.org/10.1016/0022-1139(87)95079-2.

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5

Zibouche, Nourdine, Agnieszka Kuc, Pere Miró, and Thomas Heine. "Noble-Metal Chalcogenide Nanotubes." Inorganics 2, no. 4 (October 24, 2014): 556–64. http://dx.doi.org/10.3390/inorganics2040556.

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6

Hegde, M. S., Giridhar Madras, and K. C. Patil. "Noble Metal Ionic Catalysts." Accounts of Chemical Research 42, no. 6 (June 16, 2009): 704–12. http://dx.doi.org/10.1021/ar800209s.

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7

Sa’adah, Umi, Artoto Arkundato, and Lutfi Rohman. "Molecular Dynamics Study for Inhibition of Iron Corrosion in High-Temperature Liquid PbBi with Nobel Gas Inhibitors." Jurnal ILMU DASAR 17, no. 2 (February 1, 2017): 95. http://dx.doi.org/10.19184/jid.v17i2.2690.

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Molecular dynamics is a popular method to observe the movement of interacting molecules. In this study molecular dynamics method was used to observe the phenomenon of iron corrosion and analyze effect of noble gases as a corrosion inhibitor for iron in liquid metal PbBi. Physical quantities are evaluated from the results of this study including: Mean Square Displacement (MSD), the diffusion coefficient, and for the crystal structure is visualized using Ovito program. The ron is placed in the middle high temperature liquid PbBi, the noble gases is injected into the liquid metal. Based on the three kinds of the noble gases (helium, neon, and argon) thhat injected into the molten metal PbBi, it obtained that Argon is the most effective in inhibiting the corrosion of iron. Argon is able to reduce the corrosion rate of 80.29% iron for temperature of 1023K. One reason to use the noble gas because these gases are difficult to react with other elements. Keywords: Molecular Dynamics, Corrosion in Liquid metals, Nobel Gases, Inhibitors
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8

Hayashi, Yamato, Masahiro Inoue, Ichitito Narita, Katsuaki Suganuma, and Hirotsugu Takizawa. "Eco-Fabrication of Metal Nanoparticle Related Materials by Home Electric Appliances." Materials Science Forum 620-622 (April 2009): 185–88. http://dx.doi.org/10.4028/www.scientific.net/msf.620-622.185.

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Applications of various noble metal nanoparticles were investigated for newly, ecology and economy home electric appliances (microwave, ultrasonic) used system. Noble metal oxides have merit in metal particles fabrication, as one of these example example, there are decomposed by only heating in air. That is, noble metal oxide don't use strong reduction atmosphere. This reduction is ecologically clean, because many noble metal oxides are not toxic and during decomposition O2 is evolved. We have reduced noble metal oxides by microwave and ultrasound, and tried to fabricate noble metal nanoparticles, and investigated various processing. These energy are widely used by home electric appliances. By choosing suitable process and conditions, it is reasonable to expect that home electric appliances ecology and economy fabrications can be extended to obtain simply various noble metal nanoparticles related materials.
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9

Hasan, Dheyaa F., and Hassan A. Yasser. "Modes Characteristics in Slab Waveguide with Noble Metal Interfaces." NeuroQuantology 20, no. 5 (April 30, 2022): 122–30. http://dx.doi.org/10.14704/nq.2022.20.5.nq22155.

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In this paper, a three-layer chip waveguide with ordinary materials was analyzed with the introducing of metal interfaces among the layers, where three types of metals were used: Au, Ag and Cu. The problem has been analyzed theoretically by deriving the characteristic equations as well as solving them numerically in the COMSOL environment. The results showed that the two methods are identical in the absence of metal, but the presence of metal will cause differences between the two methods that decrease for modes with lower orders, and the use of a small thickness of metal will increase the difference between the two methods. Field distributions vary with normalized frequency, metallic interface thickness, and little change with metal type.
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10

Salgueira, João F. S., Natalia G. Sousa, Pedro De Lima-Neto, Paulo N. S. Casciano, Adriana Correia, and Walther Schwarzacher. "Metal/Metal Multilayers Electrodeposited from Ethaline." ECS Meeting Abstracts MA2023-02, no. 20 (December 22, 2023): 1273. http://dx.doi.org/10.1149/ma2023-02201273mtgabs.

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Many researchers have studied metal/metal multilayer films electrodeposited from a single electrolyte under potentiostatic or galvanostatic control. When the electrolyte contains a high concentration of a less noble metal and a low concentration of a more noble one it is possible to alternate between depositing the latter in pure form and an alloy whose composition is dominated by the less noble component through switching either the deposition potential or current density. Most work in this field has used aqueous electrolytes, but in some situations working with alternative solvents could offer advantages. Here we present results for Ni-Cu/Cu multilayers electrodeposited from an ethaline (1:2 choline chloride : ethylene glycol) electrolyte containing 0.06 M Cu and 0.6 M Ni. The deposition potential was alternated between -0.6 V vs. Ag/AgCl at which Cu was deposited and -1.1 V at which a Ni-Cu alloy was expected. Specular films consisting of multiple repeats with nominal thicknesses down to 10 nm Cu/ 10 nm Ni-Cu were obtained.
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11

Anusavice, Kenneth J. "Noble Metal Alloys for Metal-Ceramic Restorations." Dental Clinics of North America 29, no. 4 (October 1985): 789–803. http://dx.doi.org/10.1016/s0011-8532(22)02131-0.

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12

Zhao, Rui, Jia Xiang, Bo Wang, Lin Chen, and Songwen Tan. "Recent Advances in the Development of Noble Metal NPs for Cancer Therapy." Bioinorganic Chemistry and Applications 2022 (January 28, 2022): 1–14. http://dx.doi.org/10.1155/2022/2444516.

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With the development of nanotechnology, noble metal nanoparticles are widely used in the treatment of cancer due to their unique optical properties, excellent biocompatibility, surface effects, and small size effects. In recent years, researchers have designed and synthesized a large number of nanomedicines that can be used for cancer treatment based on the morphology, physical and chemical properties, mechanism of action, and toxicological studies of noble metal nanoparticles. Furthermore, the integration of diagnosis and treatment, hyperthermia, cytotoxicity research, and drug delivery system based on the study of noble metal nanoparticles can be used as effective means for cancer treatment. This article focuses on the analysis of noble metal nanoparticles that are widely used in the treatment of cancer, such as gold nanoparticles, silver nanoparticles, platinum nanoparticles, and palladium nanoparticles. The various methods and mechanisms of action of noble metal nanoparticles in the treatment of cancer are objectively summarized in detail. Based on the research on the therapeutic safety and toxicity of noble metal nanoparticles, the development prospect of noble metal nanoparticles in the future clinical application is prospected.
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13

Kazi, Abbas Parvez, Anna Maria Routsi, Matthew Sullivan, and Dionysios C. Christodouleas. "Fabrication and Applications of Electroplated Three-Dimensional, Open-Cell, Noble Metal Electrodes." ECS Meeting Abstracts MA2023-01, no. 23 (August 28, 2023): 2898. http://dx.doi.org/10.1149/ma2023-01232898mtgabs.

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Noble metal electrodes (Au, Ag, and Pt) have found numerous applications in electroanalysis and electrocatalysis. Noble metal electrodes are typically composed entirely of a bulk noble metal so their cost is high and they have a two-dimensional geometry. This presentation describes the fabrication of inexpensive, electroplated noble metal electrodes that have an open-cell, three-dimensional complex geometry. The electroplated noble metal electrodes exhibit a defect-free layer of a noble metal (i.e., Au, Pt or Ag) deposited onto a copper substrate structure of the desired geometry. The surface roughness of the electrodeposited films was tailored by adjusting the electroplating conditions and the composition of the electroplating solution. The electrochemical performance of the electrodes was fully characterized. The electroplated three-dimensional, open-cell electrodes were used for the detection of heavy metals in aqueous samples and the decontamination of aqueous samples that contained bacteria.
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14

Chen, Yu-Zhen, Linfeng Liang, Qihao Yang, Maochun Hong, Qiang Xu, Shu-Hong Yu, and Hai-Long Jiang. "A seed-mediated approach to the general and mild synthesis of non-noble metal nanoparticles stabilized by a metal–organic framework for highly efficient catalysis." Materials Horizons 2, no. 6 (2015): 606–12. http://dx.doi.org/10.1039/c5mh00125k.

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15

Wang, Jie, Jiang Ye, Sixuan Chen, and Qinyong Zhang. "Strain Engineering of Unconventional Crystal-Phase Noble Metal Nanocatalysts." Molecules 29, no. 7 (April 3, 2024): 1617. http://dx.doi.org/10.3390/molecules29071617.

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The crystal phase, alongside the composition, morphology, architecture, facet, size, and dimensionality, has been recognized as a critical factor influencing the properties of noble metal nanomaterials in various applications. In particular, unconventional crystal phases can potentially enable fascinating properties in noble metal nanomaterials. Recent years have witnessed notable advances in the phase engineering of nanomaterials (PEN). Within the accessible strategies for phase engineering, the effect of strain cannot be ignored because strain can act not only as the driving force of phase transition but also as the origin of the diverse physicochemical properties of the unconventional crystal phase. In this review, we highlight the development of unconventional crystal-phase noble metal nanomaterials within strain engineering. We begin with a short introduction of the unconventional crystal phase and strain effect in noble metal nanomaterials. Next, the correlations of the structure and performance of strain-engineered unconventional crystal-phase noble metal nanomaterials in electrocatalysis are highlighted, as well as the phase transitions of noble metal nanomaterials induced by the strain effect. Lastly, the challenges and opportunities within this rapidly developing field (i.e., the strain engineering of unconventional crystal-phase noble metal nanocatalysts) are discussed.
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16

Friedman, D. J., I. Lindau, and W. E. Spicer. "Noble-metal–CdTe interface formation." Physical Review B 37, no. 2 (January 15, 1988): 731–39. http://dx.doi.org/10.1103/physrevb.37.731.

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17

Nakao, Yukimichi. "Polymer-Noble Metal Cluster Hybrids." Kobunshi 43, no. 12 (1994): 852–55. http://dx.doi.org/10.1295/kobunshi.43.852.

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18

Gong, Chen, and Marina S. Leite. "Noble Metal Alloys for Plasmonics." ACS Photonics 3, no. 4 (February 29, 2016): 507–13. http://dx.doi.org/10.1021/acsphotonics.5b00586.

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19

Sealy, Cordelia. "Noble metal nitrides under pressure." Materials Today 7, no. 7-8 (July 2004): 15. http://dx.doi.org/10.1016/s1369-7021(04)00329-3.

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20

ONO, S., M. KOBAYASHI, and T. TOMOYOSE. "Covalency of noble metal halides." Solid State Ionics 176, no. 3-4 (January 31, 2005): 363–66. http://dx.doi.org/10.1016/j.ssi.2004.08.011.

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21

Sohn, Sungwoo, Yanhui Liu, Jingbei Liu, Pan Gong, Silke Prades-Rodel, Andreas Blatter, B. Ellen Scanley, Christine C. Broadbridge, and Jan Schroers. "Noble metal high entropy alloys." Scripta Materialia 126 (January 2017): 29–32. http://dx.doi.org/10.1016/j.scriptamat.2016.08.017.

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22

Gebbink, Bert Klein, Miquel Costas, Xile Hu, Henrik Junge, Martin Albrecht, Jeremy Harvey, Frank Neese, Philippe Schollhammer, and Marc-Etienne Moret. "Non-Noble Metal Catalysis – NoNoMeCat." Impact 2016, no. 2 (November 18, 2016): 20–22. http://dx.doi.org/10.21820/23987073.2016.2.20.

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23

Demartini, Anna, Marina Alloisio, Carla Cuniberti, Giovanna Dellepiane, Sushilkumar A. Jadhav, Sergio Thea, Emilia Giorgetti, Cristina Gellini, and Maurizio Muniz-Miranda. "Polydiacetylene-Functionalized Noble Metal Nanocages." Journal of Physical Chemistry C 113, no. 45 (October 20, 2009): 19475–81. http://dx.doi.org/10.1021/jp905787h.

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24

Stancheva, K. A. "ChemInform Abstract: Noble Metal Nanoparticles." ChemInform 44, no. 32 (July 18, 2013): no. http://dx.doi.org/10.1002/chin.201332213.

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25

Weber, Lothar. "Homoleptic Noble Metal Carbonyl Cations**." Angewandte Chemie International Edition in English 33, no. 10 (June 6, 1994): 1077–78. http://dx.doi.org/10.1002/anie.199410771.

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26

Wickleder, Mathias S. "Noble Metal Nitrates as Precursors." Zeitschrift für anorganische und allgemeine Chemie 638, no. 10 (August 2012): 1557. http://dx.doi.org/10.1002/zaac.201203009.

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27

Cui, Fang, Jiajia Zhang, Qing Shao, Linxu Xu, Xinzi Pan, Xiaoqiang Wang, Xiao Zhang, and Tieyu Cui. "Directed self-assembly of dual metal ions with ligands: towards the synthesis of noble metal/metal oxide composites with controlled facets." Chemical Communications 54, no. 16 (2018): 2044–47. http://dx.doi.org/10.1039/c7cc09941j.

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Despite numerous reports on noble metal/metal oxide composites, the control of the exposed facet is still a great challenge. Here, the large-scale synthesis of noble metal/metal oxide spheres with controlled facets is enabled by making use of a bottom-up self-assembly strategy.
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28

Matsushiro, Dai, Takeshi Hashishin, and Jun Tamaki. "Hydrothermal Synthesis of Noble Metal Loaded Tin Oxide Sol Solution for Gas Sensor Application." Solid State Phenomena 124-126 (June 2007): 1177–80. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.1177.

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Noble metal (Au, Pd, Pt) loaded SnO2 sol solutions have been synthesized under hydrothermal condition. The mixed solution of noble metal chloride (HAuCl4, H2PtCl6, or PdCl2) and SnCl4 was neutralized with NH4HCO3 solution. The precipitate gel obtained was thoroughly washed and finally treated under hydrothermal condition (200 oC for 3 h at pH10.5) to obtain transparent sol solution. From SEM and TEM images of powder or thin film derived from sol, any noble metal particles could not be observed. However, the grain growth was suppressed when calcined at 900 oC for noble metal loaded SnO2. The peaks of Sn3d and O1s levels in XPS were shifted to the lower binding energy side. The electrical resistances of thin films prepared from noble metal loaded SnO2 sol were larger than that of pure SnO2 thin film. These results suggested that the noble metals were certainly loaded on SnO2 surface or included in the film to modify the surface state of SnO2.
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29

Chen, Ying, Yuling Hu, and Gongke Li. "A Review on Non-Noble Metal Substrates for Surface-Enhanced Raman Scattering Detection." Chemosensors 11, no. 8 (August 1, 2023): 427. http://dx.doi.org/10.3390/chemosensors11080427.

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Surface-enhanced Raman scattering (SERS), a powerful spectroscopic technique owing to its abundant vibrational fingerprints, has been widely employed for the assay of analytes. It is generally considered that one of the critical factors determining the SERS performance is the property of the substrate materials. Apart from noble metal substrates, non-noble metal nanostructured materials, as emerging new substrates, have been extensively studied for SERS research by virtue of their superior biocompatibility, good chemical stability, outstanding selectivity, and unique physicochemical properties such as adjustable band structure and carrier concentration. Herein, in this review, we summarized the research on the analytical application of non-noble metal SERS substrates from three aspects. Firstly, we started with an introduction to the possible enhancement mechanism of non-noble metal substrates. Then, as a guideline for substrates design, several main types of materials, including carbon nanomaterials, transition metal dichalcogenides (TMDs), metal oxides, metal-organic frameworks (MOFs), transition metal carbides and nitrides (MXenes), and conjugated polymers were discussed. Finally, we especially emphasized their analytical application, such as the detection of pollutants and biomarkers. Moreover, the challenges and attractive research prospects of non-noble metal SERS substrates in practical application were proposed. This work may arouse more awareness of the practical application of the non-noble metal material-based SERS substrates, especially for bioanalysis.
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30

Alhassan, Mansur, Mahadi Bin Bahari, Abdelrahman Hamad Khalifa Owgi, and Thuan Van Tran. "Non-noble metal catalysts for dry reforming of methane: Challenges, opportunities, and future directions." E3S Web of Conferences 516 (2024): 02002. http://dx.doi.org/10.1051/e3sconf/202451602002.

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The utilization of non-noble metal catalysts for the dry reforming of methane (DRM) has gained significant attention in recent years due to the increasing demand for clean and sustainable energy sources. DRM involves the conversion of methane (CH4) and carbon (IV) oxide (CO2) into synthesis gas (syngas), a valuable mixture of hydrogen (H2) and carbon monoxide (CO). Commercialization of non-noble metal catalysts for this reaction presents several challenges that must be addressed to achieve practical implementation. This short review discusses the challenges, opportunities, and future directions of non-noble metal catalysts for DRM. First, the limitations associated with the intrinsic activity and stability of non-noble metals, such as nickel, cobalt, and iron, are explored. Enhancing catalyst performance through compositional modifications, the incorporation of promoters and supports, are ways to overcome these challenges. Directions that hold promise for advancing non-noble metal catalysts in DRM, including the advanced exploration of bimetallic catalysts for synergistic effects, and the integration of non-noble metals into novel catalytic systems, were among the future proposals, while non-noble metal catalysts have the potential to revolutionize the production of syngas and contribute significantly to the transition towards sustainable energy solutions.
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31

Sheikh, A. W. "Resistivity of noble-metal-transition-metal spin glasses." Journal of Physics F: Metal Physics 18, no. 9 (September 1988): 2015–32. http://dx.doi.org/10.1088/0305-4608/18/9/020.

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32

Liu, Jie, Wei Wang, Tong Shen, Zhiwei Zhao, Hui Feng, and Fuyi Cui. "One-step synthesis of noble metal/oxide nanocomposites with tunable size of noble metal particles and their size-dependent catalytic activity." RSC Adv. 4, no. 58 (2014): 30624–29. http://dx.doi.org/10.1039/c4ra04504a.

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33

Le Roux, Andre Rayne. "Reducing the alloy thickness of base metal ceramic restorations." Southern African Dental Technology Journal 1, no. 2 (2009): 25–29. http://dx.doi.org/10.51415/10321/565.

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Reduction in base metal alloy thickness will permit additional porcelain depth and improved aesthetics but unfortunately little information exists regarding the thickness to which base metal alloys may be reduced in comparison to noble metal alloys for metal ceramic restorations. Even with comparison of noble metal alloys the aesthetic benefits are restricted to improving aesthetics in base metal restoration further, since noble metal alloys are generally regarded as providing superior aesthetics to base metal restorative alloys. Purpose: The objective of this study was to determine whether a significant reduction in thickness could be achieved using a base metal alloy as compared to a noble metal alloy and the thickness to which base metal alloy substructures could safely be reduced while still providing the same resistance to fracture of the porcelain. Material and methods: Tensile strength tests (N) of the modulus of rupture of the porcelain were performed on 40 base metal alloy (Wiron 99, Bego, Germany) and 12 noble metal alloy rectangular specimens (5.8 mm wide and 15.0 mm long) bonded to a standardized 1.0 mm thickness of dentine Creation porcelain. The base metal alloy thickness varied in 0.1mm increments from 0.1 to 0.4 mm. The results were compared to 12 noble metal alloy (Bio Y 81, Argen, South Africa) specimens of recommended minimum thickness (0.3 mm). Data for the results was obtained using a universal tensile testing instrument, which was set to operate at a cross head speed of 0.5mm (Instron Mini 44, Instron corporation U.S.A). The applied force (N) that measured the modulus of rupture of each specimen was printed from a computer connected to the Instron Mini 44 that operated on a 95% level of confidence. Instron Agents (Durban, South Africa) performed the calibration and setting up of the machine prior to testing the specimens. Results: The results indicated a permissible 33.33% reduction in the base metal alloy specimens as compared to the noble metal alloy control specimens. This was deduced from the reduction in alloy thickness of up to 0.2 mm for base metal alloy specimens as compared to the 0.3 mm noble metal alloy specimens. The recommended thickness to which the base metal alloys could be reduced without distortion of the alloy was also 0.2 mm. The one-way ANOVA showed a level of significance of (α=05).
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34

Basu, S., and P. K. Basu. "Nanocrystalline Metal Oxides for Methane Sensors: Role of Noble Metals." Journal of Sensors 2009 (2009): 1–20. http://dx.doi.org/10.1155/2009/861968.

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Methane is an important gas for domestic and industrial applications and its source is mainly coalmines. Since methane is extremely inflammable in the coalmine atmosphere, it is essential to develop a reliable and relatively inexpensive chemical gas sensor to detect this inflammable gas below its explosion amount in air. The metal oxides have been proved to be potential materials for the development of commercial gas sensors. The functional properties of the metal oxide-based gas sensors can be improved not only by tailoring the crystal size of metal oxides but also by incorporating the noble metal catalyst on nanocrystalline metal oxide matrix. It was observed that the surface modification of nanocrystalline metal oxide thin films by noble metal sensitizers and the use of a noble metal catalytic contact as electrode reduce the operating temperatures appreciably and improve the sensing properties. This review article concentrates on the nanocrystalline metal oxide methane sensors and the role of noble metals on the sensing properties.
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35

Hegde, M. S., and Parthasarathi Bera. "Noble metal ion substituted CeO2 catalysts: Electronic interaction between noble metal ions and CeO2 lattice." Catalysis Today 253 (September 2015): 40–50. http://dx.doi.org/10.1016/j.cattod.2015.03.035.

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36

Ren, Nan, An-Gang Dong, Wen-Bin Cai, Ya-Hong Zhang, Wu-Li Yang, Sheng-Juan Huo, Ying Chen, Song-Hai Xie, Zi Gao, and Yi Tang. "Mesoporous microcapsules with noble metal or noble metal oxide shells and their application in electrocatalysis." Journal of Materials Chemistry 14, no. 24 (2004): 3548. http://dx.doi.org/10.1039/b411669k.

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37

Wang, Jian, Essalhi Fatima-Ezzahra, Jie Dai, Yanlei Liu, Chengjie Pei, Hai Li, Zhiwei Wang, and Xiao Huang. "Ligand-assisted deposition of ultra-small Au nanodots on Fe2O3/reduced graphene oxide for flexible gas sensors." Nanoscale Advances 4, no. 5 (2022): 1345–50. http://dx.doi.org/10.1039/d1na00734c.

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This work demonstrates introducing noble metal nanodots with suitable surface ligands in gas sensing materials is an effective way to improve their performance, and noble metal/metal oxide/rGO composites have potentials in flexible gas sensing.
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38

Deng, Shao Xin, Hu Wang, and Tie Hong Chen. "Solvent-Free Aerobic Oxidation of Benzyl Alcohol by Resin Supported Noble Metal Catalysts." Advanced Materials Research 466-467 (February 2012): 234–37. http://dx.doi.org/10.4028/www.scientific.net/amr.466-467.234.

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Noble metal nanoparticle catalysts supported by resin were prepared by a simple adsorption method. Resin D261 is an organic polymer containing quaternary ammonium group. The specific interaction between quaternary ammonium groups and different kinds of noble metal precursors can be generally applied for the preparation of supported noble metal catalysts. Due to the specific interaction, an easy control of the loading of noble metal can be achieved. Furthermore, without using volatile organic solvents and calcinations in the preparation procedure, the method reported here is environmentally benign and economically feasible. The catalysts were tested in aerobic oxidation of benzyl alcohol to benzaldehyde under solvent- and base-free conditions and exhibited high activity and excellent selectivity.
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39

Busko, T. O. "Electron structure of TiO 2 composite films with noble metal nanoparticles." Semiconductor Physics Quantum Electronics and Optoelectronics 17, no. 1 (March 31, 2014): 67–74. http://dx.doi.org/10.15407/spqeo17.01.067.

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40

Huang, Zhi, Xuejuan Tang, Junjie Zhao, Hua Lin, Ming Nie, and Qing Li. "FeV3O8/MoS2 nanostructure heterojunctions as a highly effective electrocatalyst for hydrogen evolution." Journal of Materials Chemistry C 10, no. 9 (2022): 3489–99. http://dx.doi.org/10.1039/d1tc05180f.

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41

Cotty, Stephen Richard, and Xiao Su. "Electrochemical Recovery and Concentration of Noble Metals." ECS Meeting Abstracts MA2022-02, no. 27 (October 9, 2022): 1042. http://dx.doi.org/10.1149/ma2022-02271042mtgabs.

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Noble metals are integral materials to chemical and electronics industries for their unmatched chemical inertness, electrical conductivity, and catalytic activity. However, the growing demand for noble metals such as Pt, Pd, and Au is outpacing the dwindling supply, and without new recycle strategies these critical noble metal resources will run out. Therefore, energy and resource efficient noble metal recycling technologies are critical to develop sustainable use of these scarce and valuable resources. Recently, electrification of chemical process units has been receiving justifiable attention as an easily scalable means of increasing energy and material sustainability in industry, particularly for chemical separations. In particular, the incorporation of redox-active materials has been met with great success for chemical energy storage and chemical separations due to enhanced charge transfer and easily tunable target ion interactions. Here, we introduce an electrochemically mediated platform for capture, release, and up-concentration of noble metal complexes from mining ore, electronic waste, and valuable elements in industrial manufacturing, where favorable charge transfer binding of noble metals to electrode bound redox sites enables selective capture of target noble metals over other common competitors – all with the flick of a switch. Highlights of our system are its high uptake (>200 mg/g), selectivity (>5 vs competing ions), energy efficiency (<5 kJ/g-PGM), cyclability (>5000 reuse cycles), and scalability to flow system. Technoeconomic analysis of our system compared to current industrial separation technologies indicates economically significant improvements in capital and operating costs with our electrochemical noble metal recycling platform. By lowering the economic barrier of noble metal recycling, these critical materials can be sustainably used and reused for years to come.
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42

Qin, Ming, Qing Chang, Yinkai Yu, and Hongjing Wu. "Exterior and Internal Uniform Loading of Pt Nanoparticles on Yolk-Shell La2O3 by Acoustic Levitation Synthesis with Enhanced Photocatalytic Performance." Materials 13, no. 1 (December 25, 2019): 107. http://dx.doi.org/10.3390/ma13010107.

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By the deposition of noble metal nanoparticles on a metal oxide substrate with a specific micro-/nanostructure, namely, yolk-shell structure, a remarkable improvement in photocatalytic performance can be achieved by the composites. Nevertheless, noble metal nanoparticles only distribute on the surface shell of metal oxide substrates when the conventional wet-chemistry reduction approach is employed. Herein, we proposed a novel acoustic levitation synthesis of Pt nanoparticles deposited on yolk-shell La2O3. The composites not only displayed well-defined, homogeneous distribution of Pt NPs on the exterior shell of La2O3 and the interior La2O3 core, but an enhanced chemical interaction between Pt and La2O3. The unique structure not only can display improved photocatalytic degradation rate toward methyl orange, but also may show great potential in fields of hydrogen generation, environmental protection, etc. The novel acoustic levitation synthesis can supplement the methodology of synthesizing well dispersed noble metal oxides over the whole yolk-shell structure through noble metal NPs deposition method.
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43

Liu, Man Man, Dong Yan, Ping Feng, Jian Pu, Bo Chi, and Jian Li. "Diffusion Phenomenon of Precious Metal Electrode Elements into Ceramic Electrolytes after Working Process at SOFC and Sensors." Key Engineering Materials 768 (April 2018): 167–71. http://dx.doi.org/10.4028/www.scientific.net/kem.768.167.

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SOFC single cell use the preparation process of precision casting-screen printing-co-sintering and developed a new electrode such as precious metal ceramic electrode. Although SOFC single battery comprehensive performance indicators in our country are currently synchronized with the international advanced technology level, the new precious metal ceramic electrode has not been tested for long-term operation of the full battery. In order to analyze the practicality of the new noble metal ceramic electrode, especially whether the noble metal electrode is one of the factors that cause performance degradation, this paper studies whether the noble metal Pd electrode would diffuse into the YSZ electrolyte during the energization process. The composition and morphology of the electrolytes of 350h half-cell was analyzed by the battery polarization test, SEM, EDX and Electron etching depth analysis of XPS. The result shows that the noble metal Pd element has diffused more than 100 nm into the YSZ electrolyte after 350h constant current.
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44

Memon, Mazhar Ahmed, Yanan Jiang, Muhammad Azher Hassan, Muhammad Ajmal, Hong Wang, and Yuan Liu. "Heterogeneous Catalysts for Carbon Dioxide Methanation: A View on Catalytic Performance." Catalysts 13, no. 12 (December 15, 2023): 1514. http://dx.doi.org/10.3390/catal13121514.

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CO2 methanation offers a promising route for converting CO2 into valuable chemicals and energy fuels at the same time as hydrogen is stored in methane, so the development of suitable catalysts is crucial. In this review, the performance of catalysts for CO2 methanation is presented and discussed, including noble metal-based catalysts and non-noble metal-based catalysts. Among the noble metal-based catalysts (Ru, Rh, and Pd), Ru-based catalysts show the best catalytic performance. In the non-noble metal catalysts, Ni-based catalysts are the best among Ni-, Co-, and Fe-based catalysts. The factors predominantly affecting catalytic performance are the dispersion of the active metal; the synergy of the active metal with support; and the addition of dopants. Further comprehensive investigations into (i) catalytic performance under industrial conditions, (ii) stability over a much longer period and (iii) activity enhancement at low reaction temperatures are anticipated to meet the industrial applications of CO2 methanation.
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Vikentyev, Ilya, Olga Vikent’eva, Eugenia Tyukova, Maximilian Nikolsky, Julia Ivanova, Nina Sidorova, Dmitry Tonkacheev, et al. "Noble Metal Speciations in Hydrothermal Sulphides." Minerals 11, no. 5 (May 3, 2021): 488. http://dx.doi.org/10.3390/min11050488.

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A significant part of the primary gold reserves in the world is contained in sulphide ores, many types of which are refractory in gold processing. The deposits of refractory sulphide ores will be the main potential source of gold production in the future. The refractory gold and silver in sulphide ores can be associated with micro- and nano-sized inclusions of Au and Ag minerals as well as isomorphous, adsorbed and other species of noble metals (NM) not thoroughly investigated. For gold and gold-bearing deposits of the Urals, distribution and forms of NM were studied in base metal sulphides by laser ablation-inductively coupled plasma mass spectrometry and by neutron activation analysis. Composition of arsenopyrite and As-pyrite, proper Au and Ag minerals were identified using electron probe microanalysis. The ratio of various forms of invisible gold—which includes nanoparticles and chemically bound gold—in sulphides is discussed. Observations were also performed on about 120 synthetic crystals of NM-doped sphalerite and greenockite. In VMS ores with increasing metamorphism, CAu and CAg in the major sulphides (sphalerite, chalcopyrite, pyrite) generally decrease. A portion of invisible gold also decreases —from ~65–85% to ~35–60% of the total Au. As a result of recrystallisation of ores, the invisible gold is enlarged and passes into the visible state as native gold, Au-Ag tellurides and sulphides. In the gold deposits of the Urals, the portion of invisible gold is usually <30% of the bulk Au.
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46

Gruber, Sabine, and Cordt Zollfrank. "Noble metal nanoparticles on biotemplated nanowires." Bioinspired, Biomimetic and Nanobiomaterials 1, no. 2 (April 2012): 95–100. http://dx.doi.org/10.1680/bbn.11.00010.

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47

Doria, Gonçalo, João Conde, Bruno Veigas, Leticia Giestas, Carina Almeida, Maria Assunção, João Rosa, and Pedro V. Baptista. "Noble Metal Nanoparticles for Biosensing Applications." Sensors 12, no. 2 (February 7, 2012): 1657–87. http://dx.doi.org/10.3390/s120201657.

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48

Zhang, Chao, Ling-Dong Sun, and Chun-Hua Yan. "Noble metal plasmonic nanostructure related chromisms." Inorganic Chemistry Frontiers 3, no. 2 (2016): 203–17. http://dx.doi.org/10.1039/c5qi00222b.

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Kooij, E. Stefan, Waqqar Ahmed, Harold J. W. Zandvliet, and Bene Poelsema. "Localized Plasmons in Noble Metal Nanospheroids." Journal of Physical Chemistry C 115, no. 21 (May 10, 2011): 10321–32. http://dx.doi.org/10.1021/jp112085s.

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50

Li, Yahui, Yuya Hu, and Xiao-Feng Wu. "Non-noble metal-catalysed carbonylative transformations." Chemical Society Reviews 47, no. 1 (2018): 172–94. http://dx.doi.org/10.1039/c7cs00529f.

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