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RuO2 clusters derived from bulk SrRuO3: Robust catalyst for oxygen evolution reaction in acid


Developing highly efficient oxygen evolution reaction (OER) catalyst for the acidic corrosive operating conditions is a challenging task. Herein, we report the synthesis of uniform RuO2 clusters with ∼ 2 nm in size via electrochemical leaching of Sr from SrRuO3 ceramic in acid. The RuO2 clusters exhibit ultrahigh OER activity with overpotential of ∼ 160 mV at 10 mA·cmgeo−2 in 1.0 M HClO4 solution for 30-h testing. The extended X-ray absorption fine structure measurement reveals enlarged Jahn-Teller distortion of RuO octahedra in the RuO2 clusters compared to its bulk counterpart. Density function theory calculations show that the enhanced Jahn-Teller distortion can improve the intrinsic OER activity of RuO2.

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This work was supported by the National Natural Science Foundation of China (Nos. 22022508, 51602143 and 11874036), Guangdong Natural Science Foundation for Distinguished Young Scholars (No. 2016A030306020), and the National Key Research and Development Program of China (No. 2017YFB0701600). We also thank the staffs from BL14W1 beamline of National Facility for Protein Science in Shanghai (NFPS) at Shanghai Synchrotron Radiation Facility, for assistance during data collection. Tianjin and Guangzhou Supercomputing Center is also acknowledged for allowing the use of computational resources including TIANHE-1 and TIANHE-2.

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Correspondence to Jin Wang, Jia Li or Yadong Li.

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Ji, M., Yang, X., Chang, S. et al. RuO2 clusters derived from bulk SrRuO3: Robust catalyst for oxygen evolution reaction in acid. Nano Res. (2021).

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  • oxygen evolution reaction
  • RuO2 cluster
  • electrochemical leaching
  • acid solution