Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 267, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118675
Keywords
Heterointerfaces; Electronic structure control; Metal sulfides; Earth-abundant hybrid catalyst; Hydrogen evolution reaction
Funding
- National Nature Science Foundation of China [11874005]
- engineering science youth scholars fund program of BIC-ESAT
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The electrode kinetics of hydrogen evolution reaction (HER) greatly relies on both strong water absorption and strong H atom desorption for fast electron transfer while prompting hydrogen evolution, but it is very challenging to achieve due to the tough trading off between water absorption and H-desorption ability of the catalyst. Herein, a unique high-surficial multi-heteroatomic catalytic process is realized by rationally design and tailor Ni3Sn2S2 dots-decorated thin Ni3S2 nanosheets to form sheets-on-sheets array self-supported electrode by simple hydrothermal process. The formed Ni3Sn2S2@Ni3S2-2 NF delivers a superior performance very close to the noble catalyst (Pt/C) at low current densities with an onset-potential of nearly 0 mV and overpotentials of 50.7 mV at 10 mA cm(-2) while surprisingly surpassing Pt/C at high current densities. The outstanding HER performance of the catalyst can be ascribed that the rationally tuned multi-heterogeneous interfaces and electronic structure control can realize both strong water absorption and strong H atom desorption to not only significantly promotes fast electron transfer, but also greatly enhances the gas release toward efficient HER. This work holds a great promise to fabricate a non-noble HER catalyst for high-performance close to the noble catalysts such as Pt/C while shedding a light on fundamentals to guide construction of high-surficial heteroatomic multi-heterogeneous catalysts with superior performance.
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