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Noble metal
About: Noble metal is a research topic. Over the lifetime, 15113 publications have been published within this topic receiving 337947 citations.
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TL;DR: The results indicated that, serving as a CE in DSCs, telluride could be a cost-effective and efficient alternative to the noble metal Pt.
106 citations
TL;DR: In this article, the authors demonstrate a highly-durable alloy catalyst derived by alloying PtPd with 3D transition metals (Cu, Ni or Co) in ternary compositions, and the origin of the high durability is probed by in-situ/operando high-energy synchrotron X-ray diffraction coupled with pair distribution function analysis of atomic phase structures and strains.
Abstract: Alloying noble metals with non-noble metals enables high activity while reducing the cost of electrocatalysts in fuel cells. However, under fuel cell operating conditions, state-of-the-art oxygen reduction reaction alloy catalysts either feature high atomic percentages of noble metals (>70%) with limited durability or show poor durability when lower percentages of noble metals (<50%) are used. Here, we demonstrate a highly-durable alloy catalyst derived by alloying PtPd (<50%) with 3d-transition metals (Cu, Ni or Co) in ternary compositions. The origin of the high durability is probed by in-situ/operando high-energy synchrotron X-ray diffraction coupled with pair distribution function analysis of atomic phase structures and strains, revealing an important role of realloying in the compressively-strained single-phase alloy state despite the occurrence of dealloying. The implication of the finding, a striking departure from previous perceptions of phase-segregated noble metal skin or complete dealloying of non-noble metals, is the fulfilling of the promise of alloy catalysts for mass commercialization of fuel cells.
106 citations
Patent•
30 Apr 1990TL;DR: In this paper, the authors describe a process using a catalyst to convert or destroy organic compounds including organohalogen compounds, at a temperature of about 200° to about 500° C. with the catalyst described above in the presence of an oxidizing agent and water.
Abstract: This application relates to a catalyst and a process using this catalyst to convert or destroy organic compounds including organohalogen compounds. A preferred catalyst contains as catalytic components titania, vanadium oxide, tungsten oxide, tin oxide and at least one noble metal selected from the group consisting of platinum, palladium and rhodium, characterized in that the vanadium oxide, tungsten oxide and noble metals are uniformly dispersed on the titania. The process of this invention comprises contacting the gas stream, which contains organohalogen compounds and other organic compounds, at a temperature of about 200° to about 500° C. with the catalyst described above in the presence of an oxidizing agent and water. The oxidizing agent can be oxygen or air.
106 citations
TL;DR: In this article, a hybrid of nitrogen-doped carbon shell coated CoP nanocrystals encapsulated in porous nitrogen-Doped carbon substrate (CoP/PNC), which is synthesized through sol-gel and consequent pyrolysis-oxidation-phosphorization method, is reported.
106 citations
TL;DR: The use of carbon paste electrodes (carbon of graphite intimately mixed with an organic liquid) as substitutes for noble metal electrodes is described in this paper, which can be applied to routine analysis using standard techniques of anodic voltammetry.
106 citations