The Rapid Preparation of Efficient MoFeCo-Based Bifunctional Electrocatalysts via Joule Heating for Overall Water Splitting

Authors

Ao Zhou, 1. Fuel Cell System and Engineering Laboratory, Key Laboratory of Fuel Cells & Hybrid Power Sources, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;
Wei-Jian Guo, Key Laboratory for Colloid and Interface Chemistry Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, Shandong, China;
Yue-Qing Wang, Key Laboratory for Colloid and Interface Chemistry Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, Shandong, China;Follow
Jin-Tao Zhang, Key Laboratory for Colloid and Interface Chemistry Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, Shandong, China;Follow

Corresponding Author

Yue-Qing Wang(wangyueqing@sdu.edu.cn);
Jin-Tao Zhang(jtzhang@sdu.edu.cn)

Abstract

Water electrolysis is an available way to obtain green hydrogen. The development of highly efficient electrocatalysts is a current research hotspot for water splitting, but it remains challenging. Herein, we demonstrate the synthesis of a robust bifunctional multi-metal electrocatalysts toward water splitting via the rapid Joule-heating conversion of metal precursors. The composition and morphology were well regulated via altering the ratio of metal precursors. In particular, the trimetal MoC/FeO/CoO/carbon cloth (CC) electrode revealed the outstanding bifunctional electrocatalytic performance due to the unique composition and large electrochemical active surface area. Typically, the MoC/FeO/CoO/CC catalyst needed low overpotentials of 121 and 268 mV to reach 10 mA·cm^-2 toward HER and OER in 1 mol·L^-1 KOH solution, respectively. When used as both cathode and anode, a small potential of 1.69 V was required to achieve 10 mA·cm^-2 for overall water splitting and an impressive stability for 25 h was observed. This facile and rapid Joule heating strategy offers guideline for rational manufacture of bimetal or multi-metal electrocatalysts toward diverse application.

Graphical Abstract

Keywords

hydrogen evolution reaction, oxygen evolution reaction, bifunctional electrocatalyst, water splitting, Joule heating

DOI Link

https://doi.org/10.13208/j.electrochem.2214007

Publication Date

2022-09-28

Online Available Date

2022-08-23

Revised Date

2022-07-21

Received Date

2022-06-28

Recommended Citation

Ao Zhou, Wei-Jian Guo, Yue-Qing Wang, Jin-Tao Zhang. The Rapid Preparation of Efficient MoFeCo-Based Bifunctional Electrocatalysts via Joule Heating for Overall Water Splitting[J]. Journal of Electrochemistry, 2022 , 28(9): 2214007.
DOI: 10.13208/j.electrochem.2214007
Available at: https://jelectrochem.xmu.edu.cn/journal/vol28/iss9/4