Heterogeneous Ni‐Boride/Phosphide Anchored Amorphous B‐C Layer for Overall Water Electrocatalysis

Author:

Song Shiwei12,Wang Yanhui1,Liu Yucan1,Tian Pengfei2,Zang Jianbing1ORCID

Affiliation:

1. State Key Laboratory of Metastable Materials Science and Technology School of Materials Science and Engineering Yanshan University No. 438 West Hebei Avenue Qinhuangdao Hebei 066004 P. R. China

2. School of Materials Science and Engineering Linyi University West side of the north section of Industrial Avenue Linyi Shandong 276000 P. R. China

Abstract

AbstractThe rational design of efficient and economical bifunctional electrocatalysts remained a challenge for overall water electrolysis. In this work, the Ni‐boride/ phosphide particles anchored amorphous B‐doped carbon layer with hierarchical porous characteristics in Ni foam (Ni3P/Ni3B/B−C/NF) was fabricated for overall water splitting. The Boroncarbide (B4C) power was filled and fixed in the NF interspace through the electroplating and electroless plating, and then annealed in vacuum high temperature. The amorphous B−C layer derived from the B4 C not only speeded up the electron transport, but also cooperate with Ni‐boride/phosphide to enhance the electrocatalytic activity for HER and OER synergistically. Furthermore, the hierarchical porous architecture of Ni3P/Ni3B/B−C/NF increased space utilization to load more active materials. The self‐supported Ni3P/Ni3B/B−C/NF electrode possessed a low overpotential of 212 and 280 mV to deliver 100 mA cm−2 for HER and OER, respectively, and high stability for 48 h. In particular, the electrolyzer constituted with the Ni3P/Ni3B/B−C/NF bifunctional electrocatalyst only required a voltage of 1.59 V at 50 mA cm−2 for water electrocatalysis under alkaline medium, and demonstrated long‐term stability for 48 h. This study provides a new technical path for the development of bifunctional of transition metal borides to promote the application of hydrogen production from water splitting.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Hebei Province

Publisher

Wiley

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