期刊
CARBON ENERGY
卷 1, 期 1, 页码 77-84出版社
WILEY
DOI: 10.1002/cey2.3
关键词
hydrogen evolution; interfacial electronic coupling; metal oxide; N-H bond; polyaniline
类别
资金
- National Research Foundation (NRF), Prime Minister's Office, Singapore Campus for Research Excellence and Technological Enterprise (CREATE) programme
- Ministry of Education, Singapore [M4011784 RG6/17, M4012076 RG118/18]
Tuning and optimization of electronic structures and related reaction energetics are critical toward the rational design of efficient electrocatalysts. Herein, experimental and theoretical calculation demonstrate the originally inert N site within polyaniline (PANI) can be activated for hydrogen evolution by proper d-pi interfacial electronic coupling with metal oxide. As a result, the assynthesized WO3 assemblies@PANI via a facile redox-induced assembly and in situ polymerization, exhibits the electrocatalytic production of hydrogen better than other control samples including W18O49@PANI and most of the reported nobel-metal-free electrocatalysts, with low overpotential of 74 mV at 10 mA.cm(-2) and small Tafel slope of 46 mV.dec(-1) in 0.5M H2SO4 (comparable to commercial Pt/C). The general efficacy of this methodology is also validated by extension to other metal oxides such as MoO3 with similar improvements.
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