Adsorption und anodische oxydation von wasserstoff an wolframcarbid

Böhm, H.

doi:10.1016/0013-4686(70)85020-4

Cited by 96 publications

(31 citation statements)

References 3 publications

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“…Since the studies of Böhm in the early 1970s, [19] WC has been discussed as a possible replacement for platinum as an electrocatalyst for hydrogen oxidation. [20][21][22] It has also been shown to possess good electrocatalytic properties toward the oxidation of formate, [23,24] but it could not fulfill the demands of chemical fuel cells.…”

mentioning

confidence: 99%

Interfacing Electrocatalysis and Biocatalysis with Tungsten Carbide: A High‐Performance, Noble‐Metal‐Free Microbial Fuel Cell

Rosenbaum¹,

Zhao²,

Schröder³

et al. 2006

Angew Chem Int Ed

164

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mentioning

confidence: 99%

Interfacing Electrocatalysis and Biocatalysis with Tungsten Carbide: A High‐Performance, Noble‐Metal‐Free Microbial Fuel Cell

Rosenbaum¹,

Zhao²,

Schröder³

et al. 2006

Angew Chem Int Ed

164

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“…Considering the diffraction pattern was identical to that of WO 2 phase, the surface of APT-650 was partially oxidized. 10,18 Thus, it was considered that the high operating temperature of 200 C could not significantly enhance the rate of this step. [24][25][26] This result revealed the existence of WO 3 as well as metallic W on the surface.…”

Section: Resultsmentioning

confidence: 99%

“…[9][10][11][12][13] Moreover, considerable efforts have been devoted to improving insufficient catalytic activity of these materials for hydrogen oxidation. Among them, carbides of transition metals have been paid attention as prospective alternative electrocatalysts, since molybdenum and tungsten carbides showed catalytic activity comparable to noble metals for several reactions.…”

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confidence: 99%

Tungsten-based Carbides as Anode for Intermediate-Temperature Fuel Cells

Muroyama

Katsukawa

Matsui

et al. 2011

J. Electrochem. Soc.

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Tungsten carbides were prepared from ammonium paratungstate via temperature-programmed carburization under flowing a gaseous mixture of CH 4 =H 2 to employ as anode catalysts in fuel cells consisting of CsH 2 PO 4 =SiP 2 O 7 -based composite electrolyte operative at 200 C. The resulting materials were characterized by X-ray diffraction and X-ray photoelectron spectroscopy. The heat-treatment at high temperatures promoted the reduction and carburization of tungsten component. The single phase of WC was observed for the samples subjected to the carburization at and above 800 C. The single cell employing the catalyst prepared at 850 C attained the best performance. The anode material containing the metallic W exhibited low stability under the power generation condition. With nickel or cobalt additives, the carburization of tungsten species was initiated at low temperatures. The samples with the additives heat-treated at high temperatures were composed of several tungsten carbides including WC. When these samples were applied as anode catalysts, the additive species lowered the cell performance. These results indicated that the WC phase was the most effective electrocatalyst for the hydrogen oxidation.

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“…Since the early transition metal carbides were found to provide noble metal-like properties, [1,2] there has been a renewed interest in these materials in the field of catalysis, especially so in the case of Group 5 and 6 carbides. It is hoped that such materials may be able to substitute scarcer and more expensive noble metals in a growing field of applications, including fuel cells and energy-related catalysis.…”

Section: Introductionmentioning

confidence: 99%

Carbon Dynamics on the Molybdenum Carbide Surface during Catalytic Propane Dehydrogenation

Frank¹,

Cotter²,

Schuster³

et al. 2013

Chemistry A European J

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The effect of the gas-phase chemical potential on surface chemistry and reactivity of molybdenum carbide has been investigated in catalytic reactions of propane in oxidizing and reducing reactant mixtures by adding H2, O2, H2O, and CO2 to a C3H8/N2 feed. The balance between surface oxidation state, phase stability, carbon deposition, and the complex reaction network involving dehydrogenation reactions, hydrogenolysis, metathesis, water-gas shift reaction, hydrogenation, and steam reforming is discussed. Raman spectroscopy and a surface-sensitive study by means of in situ X-ray photoelectron spectroscopy evidence that the dynamic formation of surface carbon species under a reducing atmosphere strongly shifts the product spectrum to the C3-alkene at the expense of hydrogenolysis products. A similar response of selectivity, which is accompanied by a boost of activity, is observed by tuning the oxidation state of Mo in the presence of mild oxidants, such as H2O and CO2, in the feed as well as by V doping. The results obtained allow us to draw a picture of the active catalyst surface and to propose a structure-activity correlation as a map for catalyst optimization.

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Adsorption und anodische oxydation von wasserstoff an wolframcarbid

Cited by 96 publications

References 3 publications

Interfacing Electrocatalysis and Biocatalysis with Tungsten Carbide: A High‐Performance, Noble‐Metal‐Free Microbial Fuel Cell

Interfacing Electrocatalysis and Biocatalysis with Tungsten Carbide: A High‐Performance, Noble‐Metal‐Free Microbial Fuel Cell

Tungsten-based Carbides as Anode for Intermediate-Temperature Fuel Cells

Carbon Dynamics on the Molybdenum Carbide Surface during Catalytic Propane Dehydrogenation

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