Xianglong Lu1, Tianshui Yu1, Hailing Wang1, Ruichun Luo2, Pan Liu2, Songliu Yuan1, Lihua Qian1,*
Journal of Renewable Materials, Vol.8, No.2, pp. 133-151, 2020, DOI:10.32604/jrm.2020.08650
Abstract Hydrogen evolution reaction (HER) in neutral medium suffers from
slow kinetics as compared to that in alkaline or acidic conditions, owing to larger
Ohmic loss and low proton concentration. Here we report that a self-supported
nanoporous Au-SnOx (NP Au-SnOx) catalyst with gradient tin oxide surface could
significantly enhance HER activity in neutral buffer solution (0.2 M PBS). The
NP Au-SnOx catalyst exhibits a low onset overpotential of 38 mV and a small
Tafel slope of 79 mV dec−1
. The current density of 10 mA cm−2 is manifested
at an overpotential as low as 148 mV, representing the comparable performance… More >
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