Chemical Research in Chinese Universities ›› 2020, Vol. 36 ›› Issue (4): 709-714.doi: 10.1007/s40242-020-0167-2

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Bioinspired Construction of Ruthenium-decorated Nitrogen-doped Graphene Aerogel as an Efficient Electrocatalyst for Hydrogen Evolution Reaction

SHI Yi1,2, DAI Wenrui1,3, WANG Meng1,3,4, XING Yongfang2, XIA Xinghua2, CHEN Wei1,3,4,5   

  1. 1. Department of Chemistry, National University of Singapore,;
    3 Science Drive 3, 117543, Singapore;
    2. State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China;
    3. National University of Singapore(Suzhou) Research Institute, Suzhou 215123, P. R. China;
    4. Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, P. R. China;
    5. Department of Physics, National University of Singapore, 117542, Singapore
  • Received:2020-06-04 Revised:2020-07-07 Online:2020-08-01 Published:2020-07-30
  • Contact: XIA Xinghua, CHEN Wei E-mail:xhxia@nju.edu.cn;phycw@nus.edu.sg
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21902076), the Natural Science Foundation of Jiangsu Province, China(No.BK20190289), the Singapore National Research Foundation(No.NRF2017NRF-NSFC001-007), the Singapore MOE Tier II Grant(No.R143-000-A29-112), and the NUS Flagship Green Energy Programme.

Abstract: Rational construction of low-cost, efficient, and durable electrocatalysts for the hydrogen evolution reaction(HER) is essential to further develop water electrolysis industry. Inspired by the natural enzyme catalysis with coordination environments of catalytic sites and three-dimensional structures, we construct an efficient Ru-based catalyst anchored on the nitrogen dopant on graphene aerogel(Ru-NGA). The Ru-NGA catalyst exhibits dramatically improved electroactivity and stability towards HER with a near-zero onset overpotential, a low Tafel slope of 32 mV/dec, and a high turnover frequency of 5.5 s-1 at -100 mV. The results show that the electronic modulation of metallic Ru nanoparticles by nitrogen coordination weakens the affinity of Ru towards H and hence facilitates the desorption of hydrogen. This research provides in-depth insights into the fundamental relationship between metallic nanostructure and HER activity, and also guides the rational design of high-performance electrocatalysts in energy conversion.

Key words: Ruthenium, Graphene aerogel, Hydrogen evolution reaction, Electronic modulation, Electrocatalysis