Trace Lattice S Inserted RuO2 Flexible Nanosheets for Efficient and Long-Term 
Acidic Oxygen Evolution Catalysis

Liu, Liangbin; Ji, Yujin; You, Wentao; Liu, Shangheng; Shao, Qi; Kong, Qingyu; Hu, Zhiwei; Tao, Huabing; Bu, Lingzheng; Huang, Xiaoqing

doi:10.1002/smll.202208202

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Trace Lattice S Inserted RuO₂ Flexible Nanosheets for Efficient and Long-Term Acidic Oxygen Evolution Catalysis

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Hu, Zhiwei
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Liu, L., Ji, Y., You, W., Liu, S., Shao, Q., Kong, Q., et al. (2023). Trace Lattice S Inserted RuO₂ Flexible Nanosheets for Efficient and Long-Term Acidic Oxygen Evolution Catalysis. Small, 19(38): 2208202, pp. 1-9. doi:10.1002/smll.202208202.

Cite as: https://hdl.handle.net/21.11116/0000-000D-4016-2

Abstract

Pursuing highly active and long-term stable ruthenium (Ru) based oxygen evolution reaction (OER) catalyst for water electrolysis under acidic conditions is of great significance yet a tremendous challenge to date. To solve the problem of serious Ru corrosion in an acid medium, the trace lattice sulfur (S) inserted RuO2 catalyst is prepared. The optimized catalyst (Ru/S NSs-400) has shown a record stability of 600 h for the solely containing Ru (iridium-free) nanomaterials. In the practical proton exchange membrane device, the Ru/S NSs-400 can even sustain more than 300 h without obvious decay at the high current density of 250 mA cm−2. The detailed investigations reveal that S doping not only changes the electronic structure of Ru via forming Ru-S coordination for high adsorption of reaction intermediates but also stabilizes Ru from over-oxidation. This strategy is also effective for improving the stability of commercial Ru/C and homemade Ru-based nanoparticles. This work offers a highly effective strategy to design high-performance OER catalysts for water splitting and beyond. © 2023 Wiley-VCH GmbH.