Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 26, Issue 47, Pages 10787-10794Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202001187
Keywords
electrochemistry; gold; nanostructures; oxidation; platinum
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Funding
- Natural Science Foundation of Anhui Province [2008085MB56, 2008085MB30]
- National Natural Science Foundation of China [21871005, 21501005]
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Plasmonic nanostructures with large absorption areas under resonant excitation have been utilized extensively in photon-assisted applications. In this work, dodecahedral Au nanobowls were first prepared by an easy and template-free method only through the introduction of H(2)PtCl(6)and I(-)during the growth procedure. The Au nanobowls show electron-field enhancement due to the high curvature of the bowl edge, the open region, and dodecahedral morphology. Au/Pt nanobowls, which couple plasmonic Au and catalytic Pt, were then constructed as plasmonic electrocatalysts for methanol oxidation. The mass activity reached 497.6 mA mg(-1)under visible-light illumination, which is 1.9 times that measured in the dark. Simultaneously, the electrocatalytic stability is also greatly improved under light excitation. The enhanced properties of the plasmonic Au/Pt electrocatalysts are ascribed to the synergistic effect of the plasmon-enhanced photothermal and hot-carrier effects on the basis of experimental investigations. This work thus offers an effective methodology to construct efficient plasmonic electrocatalysts for fuel cells.
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