scholarly journals Graphene Nanosheets Effect to Improve CO-Tolerance of Pt/Graphene Nanosheets Catalyst

2018 ◽  
Vol 34 (6) ◽  
pp. 2814-2818 ◽  
Author(s):  
Kerista Sebayang ◽  
Rikson Siburian ◽  
Minto Supeno
Keyword(s):  
Hydrogen Oxidation ◽  
Graphene Nanosheets ◽  
Ph Dependence ◽  
Polymer Electrolyte Fuel Cells ◽  
Impregnation Method ◽  
Anode Catalyst ◽  
Hydrogen Oxidation Reaction ◽  
Commercial Catalyst ◽  
Co Tolerance ◽  
Supporting Material

In this paper, we concern about CO tolerance of Platinum (Pt)/Graphene Nanosheets (GNS) catalysts dependence of pH. The aim of this research is to investigate relationship between CO tolerance and Pt particle size base on pH dependence and also supporting material effect to CO-tolerance. The research method is modified Hummers and impregnation method to synthesize GNS and Pt/GNS catalysts, respectively. The results show that electrocatalytic measurements of Pt/GNS catalyst prepared at pH = 1 has the highest CO tolerance (69.4 %) under 500 ppm CO level in the hydrogen oxidation reaction among pH = 6, 12.5 and Pt/CB commercial catalyst. It means pH dependence and GNS may be expected to enhance electrocatalytic activity (CO tolerance) of Pt. Furthermore, GNS is possible used as an anode catalyst of Polymer Electrolyte Fuel Cells (PEFCs).

Electrocatalysis of CO tolerance in hydrogen oxidation reaction in PEM fuel cells

1999 ◽  
Vol 44 (19) ◽  
pp. 3283-3293 ◽  
Author(s):  
S.J Lee ◽  
S Mukerjee ◽  
E.A Ticianelli ◽  
J McBreen
Keyword(s):  
Fuel Cells ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Pem Fuel Cells ◽  
Hydrogen Oxidation Reaction ◽  
Co Tolerance

Pt/C catalyst impregnated with tungsten-oxide – Hydrogen oxidation reaction vs. CO tolerance

2019 ◽  
Vol 44 (26) ◽  
pp. 13364-13372 ◽  
Author(s):  
Snežana M. Brković ◽  
Vladimir M. Nikolić ◽  
Milica P. Marčeta Kaninski ◽  
Igor A. Pašti
Keyword(s):  
Tungsten Oxide ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Hydrogen Oxidation Reaction ◽  
Co Tolerance

Ti4O7 supported Ru@Pt core–shell catalyst for CO-tolerance in PEM fuel cell hydrogen oxidation reaction

2013 ◽  
Vol 103 ◽  
pp. 507-513 ◽  
Author(s):  
Lei Zhang ◽  
Jenny Kim ◽  
Jiujun Zhang ◽  
Feihong Nan ◽  
Nicolas Gauquelin ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Pem Fuel Cell ◽  
Core Shell ◽  
Hydrogen Oxidation Reaction ◽  
Co Tolerance

scholarly journals Universal dependence of hydrogen oxidation and evolution reaction activity of platinum-group metals on pH and hydrogen binding energy

2016 ◽  
Vol 2 (3) ◽  
pp. e1501602 ◽  
Author(s):  
Jie Zheng ◽  
Wenchao Sheng ◽  
Zhongbin Zhuang ◽  
Bingjun Xu ◽  
Yushan Yan
Keyword(s):  
Binding Energy ◽  
Hydrogen Oxidation ◽  
Ph Dependence ◽  
Platinum Group Metals ◽  
Hydrogen Binding ◽  
Hydrogen Oxidation Reaction ◽  
Promoting Effect ◽  
Onset Potential ◽  
Co Stripping ◽  
Platinum Group

Understanding how pH affects the activity of hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) is key to developing active, stable, and affordable HOR/HER catalysts for hydroxide exchange membrane fuel cells and electrolyzers. A common linear correlation between hydrogen binding energy (HBE) and pH is observed for four supported platinum-group metal catalysts (Pt/C, Ir/C, Pd/C, and Rh/C) over a broad pH range (0 to 13), suggesting that the pH dependence of HBE is metal-independent. A universal correlation between exchange current density and HBE is also observed on the four metals, indicating that they may share the same elementary steps and rate-determining steps and that the HBE is the dominant descriptor for HOR/HER activities. The onset potential of CO stripping on the four metals decreases with pH, indicating a stronger OH adsorption, which provides evidence against the promoting effect of adsorbed OH on HOR/HER.

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