A nanoporous PtCuTi alloy with a low Pt content and greatly enhanced electrocatalytic performance towards methanol oxidation and oxygen reduction

2016 ◽  
Vol 4 (38) ◽  
pp. 14657-14668 ◽  
Author(s):  
Ying Wang ◽  
Kuibo Yin ◽  
Jie Zhang ◽  
Conghui Si ◽  
Xiaoting Chen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction ◽  
Methanol Oxidation ◽  
Electrocatalytic Performance

Novel nanoporous PtCuTi with a low Pt content, fabricated by dealloying of a Cu-based precursor, exhibits greatly enhanced catalytic activity towards the ORR.

Star-shaped Pd@Pt core–shell catalysts supported on reduced graphene oxide with superior electrocatalytic performance

2014 ◽  
Vol 2 (19) ◽  
pp. 6976-6986 ◽  
Author(s):  
Youngmin Kim ◽  
Yuseong Noh ◽  
Eun Ja Lim ◽  
Seonhwa Lee ◽  
Sung Mook Choi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Methanol Oxidation ◽  
Alkaline Media ◽  
Core Shell ◽  
One Pot ◽  
Electrocatalytic Performance ◽  
Reduced Graphene ◽  
Reduction Approach

A surfactantless, one-pot reduction approach for Pd@Pt core–shell nano-stars on reduced graphene oxide with enhanced catalytic activity and stability for methanol oxidation in alkaline media.

Enhanced Electrocatalytic Performance of Pt3Pd1 Alloys Supported on CeO2/C for Methanol Oxidation and Oxygen Reduction Reactions

2017 ◽  
Vol 121 (4) ◽  
pp. 2069-2079 ◽  
Author(s):  
Ammar Bin Yousaf ◽  
M. Imran ◽  
Nestor Uwitonze ◽  
Akif Zeb ◽  
Syed Javaid Zaidi ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Methanol Oxidation ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions ◽  
Electrocatalytic Performance

Enhancement of Pt-Based Catalysts via N-Doped Carbon Supports

2008 ◽  
Author(s):  
Ryan O’Hayre ◽  
Yingke Zhou ◽  
Robert Pasquarelli ◽  
Joe Berry ◽  
David Ginley
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction ◽  
Methanol Oxidation ◽  
Nitrogen Doping ◽  
Ion Beam ◽  
Catalyst Activity ◽  
Pt Catalyst ◽  
Activity Measurement ◽  
Pt Nanoparticle ◽  
N Doping

This study experimentally examines the enhancement of carbon supported Pt-based catalysts systems via nitrogen doping. It has been reported that nitrogen-containing carbons promote significant enhancement in Pt/C catalyst activity and durability with respect to the methanol oxidation and oxygen reduction reactions. In order to systematically investigate the effect of N-doping, in this work we have developed geometrically well-defined model catalytic systems consisting of tunable assemblies of Pt catalyst nanoparticles deposited onto both N-doped and undoped highly-oriented pyrolytic graphite (HOPG) substrates. N-doping was achieved via ion beam implantation, and Pt was electrodeposited from solutions of H2PtCl6 in aqueous HClO4. Morphology from scanning electron microscopy (SEM) and catalytic activity measurement from aqueous electrochemical analysis were utilized to examine the N-doping effects. The results strongly support the theory that doping nitrogen into a graphite support significantly affects both the morphology and behavior of the overlying Pt nanoparticles. In particular, nitrogen-doping was observed to cause a significant decrease in the average Pt nanoparticle size, an increase in the Pt nanoparticle dispersion, and a significant increase in catalytic activity for both methanol oxidation and oxygen reduction.

scholarly journals De-alloyed PtCu/C Catalysts with Enhanced Electrocatalytic Performance for Oxygen Reduction Reaction

Nanoscale ◽  
2021 ◽  
Author(s):  
Zhuojie Xiao ◽  
Hao Wu ◽  
Huichi Zhong ◽  
Ali A Abdelhafiz ◽  
Jianhuang Zeng
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Electrochemical Reactions ◽  
Reaction Intermediates ◽  
Catalytic Surfaces ◽  
Promising Strategy ◽  
Electrocatalytic Performance

In electrochemical reactions, interactions between reaction intermediates and catalytic surfaces control the catalytic activity, and thereby require to be optimized. Electrochemical de-alloying of mixed-metals nanoparticles is a promising strategy to...

Effect of size and oxidation state of platinum nanoparticles on the electrocatalytic performance of graphene-nanoparticle composites

RSC Advances ◽  
2015 ◽  
Vol 5 (104) ◽  
pp. 85196-85201 ◽  
Author(s):  
Avijit Mondal ◽  
Nikhil R. Jana
Keyword(s):  
Catalytic Activity ◽  
Oxidation State ◽  
Methanol Oxidation ◽  
Platinum Nanoparticles ◽  
Pt Nanoparticles ◽  
Oxidation States ◽  
Graphene Nanocomposites ◽  
Electrocatalytic Performance ◽  
Nanoparticle Composites

Size and oxidation state of Pt nanoparticles significantly influence the electrocatalytic performance of Pt–graphene nanocomposites for methanol oxidation and 2.2 nm Pt with variable oxidation states offers the best catalytic activity and durability.

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