Journal
SMALL
Volume 14, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201703940
Keywords
bubble template; electrocatalysts; formic acid oxidation; Pd3Pt alloy; porous half-shells
Categories
Funding
- National Natural Science Foundation of China (NSFC) [21503111, 21376122, 21576139]
- Natural Science Foundation of Jiangsu Higher Education Institutions of China [16KJB150020]
- National and Local Joint Engineering Research Center of Biomedical Functional Materials and Priority Academic Program Development of Jiangsu Higher Education Institutions
- Natural Science Foundation of Jiangsu Province [BK20171473]
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Exploring highly efficient electrocatalysts is greatly important for the widespread uptake of the fuel cells. However, many newly generated nanocrystals with attractive nanostructures often have extremely limited surface area or large particle-size, which leads them to display limited electrocatalytic performance. Herein, a novel anode catalyst of hollow and porous Pd3Pt half-shells with rich active sites is synthesized by using urea as a guiding surfactant. It is identified that the formation of Pd3Pt half-shells involves the combination of bubble guiding, in situ deposition of particles and bubble burst. The obtained Pd3Pt half-shells demonstrate a rich edge area with abundant exposed active sites and surface defects, indicating great potential for the electrocatalysis. When used as an electrocatalyst, the Pd3Pt half-shells exhibit remarkably improved electrocatalytic performance for formic acid oxidation (FAO), where it promotes the dehydrogenation process of FAO by suppressing the formation of poisonous species COads via the electronic effect and ensemble effect.
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