Dynamic oxygen adsorption on single-atomic Ruthenium catalyst with high performance for acidic oxygen evolution reaction

Linlin Cao, Qiquan Luo, Jiajia Chen, Lan Wang, Yue Lin, Huijuan Wang, Xiaokang Liu, Xinyi Shen, Wei Zhang, Wei Liu, Zeming Qi, Zheng Jiang, Jinlong Yang and Tao Yao ()
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Linlin Cao: University of Science and Technology of China
Qiquan Luo: University of Science and Technology of China
Jiajia Chen: University of Science and Technology of China
Lan Wang: Southwest University of Science and Technology
Yue Lin: University of Science and Technology of China
Huijuan Wang: University of Science and Technology of China
Xiaokang Liu: University of Science and Technology of China
Xinyi Shen: University of Science and Technology of China
Wei Zhang: University of Science and Technology of China
Wei Liu: University of Science and Technology of China
Zeming Qi: University of Science and Technology of China
Zheng Jiang: Shanghai Advanced Research Institute
Jinlong Yang: University of Science and Technology of China
Tao Yao: University of Science and Technology of China

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Achieving active and stable oxygen evolution reaction (OER) in acid media based on single-atom catalysts is highly promising for cost-effective and sustainable energy supply in proton electrolyte membrane electrolyzers. Here, we report an atomically dispersed Ru1-N4 site anchored on nitrogen-carbon support (Ru-N-C) as an efficient and durable electrocatalyst for acidic OER. The single-atom Ru-N-C catalyst delivers an exceptionally intrinsic activity, reaching a mass activity as high as 3571 A gmetal−1 and turnover frequency of 3348 O2 h−1 with a low overpotential of 267 mV at a current density of 10 mA cm−2. The catalyst shows no evident deactivation or decomposition after 30-hour operation in acidic environment. Operando synchrotron radiation X-ray absorption spectroscopy and infrared spectroscopy identify the dynamic adsorption of single oxygen atom on Ru site under working potentials, and theoretical calculations demonstrate that the O-Ru1-N4 site is responsible for the high OER activity and stability.

Date: 2019
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DOI: 10.1038/s41467-019-12886-z

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