Engineering active and robust alloy-based electrocatalyst by rapid Joule-heating toward ampere-level hydrogen evolution

Zhan Zhao, Jianpeng Sun, Xiang Li, Shiyu Qin, Chunhu Li, Zisheng Zhang, Zizhen Li and Xiangchao Meng ()
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Zhan Zhao: Ocean University of China
Jianpeng Sun: Ocean University of China
Xiang Li: Ocean University of China
Shiyu Qin: Ocean University of China
Chunhu Li: Ocean University of China
Zisheng Zhang: University of Ottawa
Zizhen Li: Ocean University of China
Xiangchao Meng: Ocean University of China

Nature Communications, 2024, vol. 15, issue 1, 1-15

Abstract: Abstract Rational design of bimetallic alloy is an effective way to improve the electrocatalytic activity and stability of Mo-based cathode for ampere-level hydrogen evolution. However, it is still critical to realise desirable syntheses due to the wide reduction potentials between different metal elements and uncontrollable nucleation processes. Herein, we propose a rapid Joule heating method to effectively load RuMo alloy onto MoOx matrix. As-prepared catalyst exhibits excellent stability (2000 h @ 1000 mA cm−2) and ultralow overpotential (9 mV, 18 mV and 15 mV in 1 M KOH, 1 M PBS, 0.5 M H2SO4 solution, respectively) at 10 mA cm−2. Based on first-principle simulations and operando measurements, the impressive electrocatalytic stability and activity are investigated. And the role of rapid Joule heating method is highlighted and discussed in details. This study showcases rapid Joule heating as a feasible strategy to construct highly efficient alloy-based electrocatalysts.

Date: 2024
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DOI: 10.1038/s41467-024-51976-5

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