Observation of a robust and active catalyst for hydrogen evolution under high current densities

Yudi Zhang, Kathryn E. Arpino, Qun Yang, Naoki Kikugawa, Dmitry A. Sokolov, Clifford W. Hicks, Jian Liu (), Claudia Felser () and Guowei Li ()
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Yudi Zhang: Chinese Academy of Sciences
Kathryn E. Arpino: Max Planck Institute for Chemical Physics of Solids
Qun Yang: Max Planck Institute for Chemical Physics of Solids
Naoki Kikugawa: National Institute for Materials Science (NIMS)
Dmitry A. Sokolov: Max Planck Institute for Chemical Physics of Solids
Clifford W. Hicks: Max Planck Institute for Chemical Physics of Solids
Jian Liu: University of Chinese Academy of Sciences
Claudia Felser: Max Planck Institute for Chemical Physics of Solids
Guowei Li: Chinese Academy of Sciences

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract Despite the fruitful achievements in the development of hydrogen production catalysts with record-breaking performances, there is still a lack of durable catalysts that could work under large current densities (>1000 mA cm−2). Here, we investigated the catalytic behaviors of Sr2RuO4 bulk single crystals. This crystal has demonstrated remarkable activities under the current density of 1000 mA cm−2, which require overpotentials of 182 and 278 mV in 0.5 M H2SO4 and 1 M KOH electrolytes, respectively. These materials are stable for 56 days of continuous testing at a high current density of above 1000 mA cm−2 and then under operating temperatures of 70 °C. The in-situ formation of ferromagnetic Ru clusters at the crystal surface is observed, endowing the single-crystal catalyst with low charge transfer resistance and high wettability for rapid gas bubble removal. These experiments exemplify the potential of designing HER catalysts that work under industrial-scale current density.

Date: 2022
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DOI: 10.1038/s41467-022-35464-2

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