Journal
CHEMSUSCHEM
Volume 12, Issue 20, Pages 4662-4670Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201902043
Keywords
electrocatalysis; hydrogen evolution reaction; molybdenum phosphide; nanospheres; porous carbon
Funding
- National Natural Science Foundation of China [21776308, 21576289]
- China Postdoctoral Science Foundation [2017M620084, 2018T110187]
- Science Foundation of China University of Petroleum, Beijing [2462018YJRC009, 2462017YJRC051]
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Developing efficient, nonprecious, and durable electrocatalysts with favorable nanostructures is a persistent challenge yet is significant for the hydrogen evolution reaction (HER). Herein, for the first time, a rationally designed strategy is reported for the synthesis of hierarchical hollow MoP nanospheres anchored on N,P,S co-doped porous carbon (hs-MoP/NPSC). Importantly, the porous shell of the hollow nanosphere is constructed of a number of interwoven MoP subunits, which is beneficial for exposing surface active sites as much as possible and promoting the mass transport during the HER process. In addition, the heteroatom-enriched porous carbon networks can further reduce the electron/ion transfer resistance. As expected, the hs-MoP/NPSC electrocatalyst exhibits an encouraging HER activity with a low overpotential of only 70 mV at a current density of 10 mA cm(-2), a small Tafel slope, and long-term durability in alkaline media, outperforming most of reported Pt-free MoP-based electrocatalysts to date. This present work not only develops a highly efficient electrocatalyst for HER but also opens up opportunities to engineer novel architectures for various applications.
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