Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 16, Pages 13448-13454Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am5020452
Keywords
pyridyne; platinum; gold; graphene; electrocatalysts; oxygen reduction
Funding
- National Basic Research Pro-gram of China (973 Program) [2013CB733501]
- National Natural Science Foundation of China [NSFC-21306169, 21176221, 21136001, 21101137, 91334103]
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Preparing metal-supported graphene nanocomposites is both interesting and challenging because of their well-defined morphologies and have potential application for oxygen reduction reaction (ORR). Here, we present an easy approach to synthesizing a novel hybrid material composed of Pt@Au nanorods (NRs) uniformly dispersed on the pyridyne cydoaddition of graphene (Pt@Au-PyNG), and the material serves as a high-performance catalyst for ORK This hybrid electrocatalyst significantly decreases the use of Pt by using Pt dispersed on Au NRs and shows a markedly high activity toward ORR. The resulting Pt@Au-PyNG hybrid displayed comparable electrocatalytic activity and better stability than commercial Pt/C in alkaline solutions toward ORR. The hybrid effectively blocks CO formation to increase catalyst resistance to CO poisoning, thereby decreasing the amount of Pt needed. Free-energy diagrams for ORR on Pt@Au (111) through dissociative and associative mechanisms show that OH or 0 hydrogenation is the rate-limiting step based on DFT calculations.
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