Journal
ACS NANO
Volume 6, Issue 9, Pages 8288-8297Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn302984x
Keywords
cluster; gold; graphene; hybrids material; oxygen reduction reaction
Categories
Funding
- National Natural Science Foundation for Distinguished Youth Scholars of China [21025310]
- National Natural Science Foundation of China [21003026, 51272047, 20973047, 91027011]
- National Research Fund for Fundamental Key Project [2009CB930401]
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Non-Pt noble metal clusters like Au clusters are believed to be promising high performance catalysts for the oxygen reduction reaction (ORR) at the cathode of fuel cells, but they still suffer big problems during the catalysis reactions, such as a large amount of the capping agents being on the surface and easy occurrence of dissolution and aggregation. To overcome these obstacles, here, we present a novel and general strategy to grow ultrafine Au clusters and other metal (Pt, Pd) clusters on the reduced graphene oxide (rGO) sheets without any additional protecting molecule or reductant. Compared with the currently generally adopted nanocatalysts, including commercial Pt/C, rGO sheets, Au nanoparticle/rGO hybrids, and thiol-capped Au clusters of the same sizes, the as-synthesized Au cluster/rGO hybrids display an impressive eletrocatalytic performance toward ORR, for instance, high onset potential, superior methanol tolerance, and excellent stability.
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