scholarly journals Properties of the hydrogen oxidation reaction on Pt/C catalysts at optimised high mass transport conditions and its relevance to the anode reaction in PEFCs and cathode reactions in electrolysers

2015 ◽  
Vol 176 ◽  
pp. 763-776 ◽  
Author(s):  
C.M. Zalitis ◽  
J. Sharman ◽  
E. Wright ◽  
A.R. Kucernak
Keyword(s):  
Mass Transport ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
High Mass ◽  
Hydrogen Oxidation Reaction ◽  
Anode Reaction

scholarly journals High Hydrogen Evolution Reaction (HER) and Hydrogen Oxidation Reaction (HOR) Activity RhxSy Catalyst Synthesized with Na2S for Hydrogen-Bromine Fuel Cell

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3971
Author(s):  
Yuanchao Li ◽  
Trung Van Nguyen
Keyword(s):  
Fuel Cell ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
High Mass ◽  
Support Surface ◽  
Sulfur Source ◽  
Hydrogen Oxidation Reaction ◽  
High Hydrogen

A RhxSy/C catalyst with high mass-specific electrochemical surface area (ECSA/mass), high hydrogen oxidation reaction (HOR)/hydrogen evolution reaction (HER) activity, and high Nafion® ionomer-affinity was synthesized and evaluated. A new sulfur source, Na2S instead of (NH4)2S2O3, was applied to prepare the rhodium sulfide precursor Rh2S3 that resulted in a RhxSy catalyst with higher HOR/HER catalytic activity after thermal treatment. The higher activity was attributed to the higher quantity formation of the more active phase Rh3S4, in addition to the other active Rh17S15 phase, in the RhxSy catalyst. Using this new sulfur source, carbon substrate functionalization, and the mass-transfer-controlled nanoparticle growth process, the average particle size of this catalyst was reduced from 13.5 nm to 3.2 nm, and its ECSA/mass was increased from 9.3 m2/g-Rh to 43.0 m2/g-Rh. Finally, by applying the Baeyer–Villiger and ester hydrolysis process to convert the Nafion® ionomer-unfriendly ketone group on the carbon support surface to the Nafion ionomer-friendly carboxylic group, which increases the Nafion® affinity of this catalyst, its use in the hydrogen electrode of an H2-Br2 fuel cell resulted in a performance that is 2.5× higher than that of the fuel cell with a commercial RhxSy catalyst.

Dependence of hydrogen oxidation reaction on water vapor in anode-supported solid oxide fuel cells

2021 ◽  
Vol 362 ◽  
pp. 115565
Author(s):  
R.A. Budiman ◽  
T. Ishiyama ◽  
K.D. Bagarinao ◽  
H. Kishimoto ◽  
K. Yamaji ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Water Vapor ◽  
Solid Oxide Fuel Cells ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Hydrogen Oxidation Reaction

Carbide-Supported PtRu Catalysts for Hydrogen Oxidation Reaction in Alkaline Electrolyte

ACS Catalysis ◽  
2021 ◽  
pp. 932-947
Author(s):  
Eliran R. Hamo ◽  
Ramesh K. Singh ◽  
John C. Douglin ◽  
Sian Chen ◽  
Mohamed Ben Hassine ◽  
...  
Keyword(s):  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Alkaline Electrolyte ◽  
Hydrogen Oxidation Reaction ◽  
Ptru Catalysts

Identification of Catalyst Structure during the Hydrogen Oxidation Reaction in an Operating PEM Fuel Cell

ACS Catalysis ◽  
2016 ◽  
Vol 6 (11) ◽  
pp. 7326-7334 ◽  
Author(s):  
Armin Siebel ◽  
Yelena Gorlin ◽  
Julien Durst ◽  
Olivier Proux ◽  
Frédéric Hasché ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Pem Fuel Cell ◽  
Hydrogen Oxidation Reaction ◽  
Catalyst Structure

Catalothermionic Power Generator Based on Internal Electron Emission in Ni/SiC Heterojunction Nanostructures

2009 ◽  
Author(s):  
Eduard G. Karpov ◽  
Ievgen I. Nedrygailov
Keyword(s):  
Energy Transfer ◽  
Electron Emission ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Schottky Barriers ◽  
Gas Mixture ◽  
Hydrogen Oxidation Reaction ◽  
Power Generator ◽  
Oxidation Of Hydrogen ◽  
Internal Electron

We report on the unusual properties of single-faced SiC metal-semiconductor heterojunction nanostructures manifested by the ability to atalyze the hydrogen oxidation reaction, and also maintain internal electron emission over the Schottky barriers. As a result a stationary current has been detected in the preheated nanostructure when exposed to the oxyhydrogen gas mixture flux. The structures maintain both the non-adiabatic and electron-phonon channels of energy transfer, and the results of studies indicate the possibility for a very efficient conversion of chemical energy released in the catalytic oxidation of hydrogen into electricity.

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