An amorphous nanoporous PdCuNi-S hybrid electrocatalyst for highly efficient hydrogen production

By Yang, Xinxin; Xu, Wence; Cao, Shuo; Zhu, Shengli; Liang, Yanqin; Cui, Zhenduo; Yang, Xianjin; Li, Zhaoyang; Wu, Shuilin; Inoue, Akihisa; Chen, Luyang
Published in Applied Catalysis B: Environmental 2019

Abstract

A novel amorphous nanoporous PdCuNi-S electrocatalyst is synthesized by a two-step dealloying method. The as-formed nanoporous PdCuNi-S catalyst exhibits excellent catalytic activity for the hydrogen evolution reaction (HER) in acidic media, which is very close to commercial Pt/C catalyst. The overpotential at 10 mA cm?2 and Tafel slope are 48 mV and 35 mV dec?1, respectively. In addition, the catalyst shows good electrochemical stability in HER. The outstanding property of PdCuNi-S catalyst for hydrogen generation is attributed to the bicontinuous nanoporous structure, improved charge transfer, more bridging S22- and/or apical S2- in amorphous state and synergetic interactions of Pd, Cu, Ni and S.

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