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

Autor: Zhang Y; CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.; University of Chinese Academy of Sciences, 19A Yuquan Rd, Shijingshan District, Beijing, 100049, China., Arpino KE; Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187, Dresden, Germany., Yang Q; Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187, Dresden, Germany., Kikugawa N; National Institute for Materials Science (NIMS), Tsukuba, 305-0003, Japan., Sokolov DA; Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187, Dresden, Germany., Hicks CW; Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187, Dresden, Germany., Liu J; University of Chinese Academy of Sciences, 19A Yuquan Rd, Shijingshan District, Beijing, 100049, China. liujian@shu.edu.cn.; Center for Advanced Solidification Technology, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China. liujian@shu.edu.cn., Felser C; Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187, Dresden, Germany. claudia.felser@cpfs.mpg.de., Li G; CAS Key Laboratory of Magnetic Materials and Devices, and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China. liguowei@nimte.ac.cn.; University of Chinese Academy of Sciences, 19A Yuquan Rd, Shijingshan District, Beijing, 100049, China. liguowei@nimte.ac.cn.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2022 Dec 16; Vol. 13 (1), pp. 7784. Date of Electronic Publication: 2022 Dec 16.
DOI: 10.1038/s41467-022-35464-2
Abstrakt: 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 Sr 2 RuO 4 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 H 2 SO 4 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.
(© 2022. The Author(s).)
Databáze: MEDLINE
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