Journal
CHEMISTRY OF MATERIALS
Volume 29, Issue 15, Pages 6329-6335Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.7b01598
Keywords
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Funding
- NSFC [21431003, 21521091]
- China Ministry of Science and Technology [2016YFA0202801]
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One of the important objectives in fuel-cell technology is to improve the activity and reduce the loading of Pt for hydrogen-evolution dectrocatalysis. Here, an oxidative etching strategy of stacking faults is developed to prepare PtAgCo nanosheets by, element-specific anisotropic growth. Sophisticated use of defects in crystal growth allows tailoring the morphology and interfacial polarization to improve catalytic performance of nanosheets for the hydrogen-evolution reaction. Systematic studies reveal that the presence of the stacking faults may be the knob for the formation of nanosheets. In particular, the chemical composition of nanosheets is potentially the key for altering the hydrogen-evolution reaction. As a result, the PtAgCo-II ultrathin nanosheets possess useful HER properties, achieving a current density up to 705 mA cm(-2) at a potential of -400 mV.
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