Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (12): 2306-2312.DOI: 10.1016/S1872-2067(21)63903-7

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Surface regulated Ni nanoparticles on N-doped mesoporous carbon as an efficient electrocatalyst for CO2 reduction

Min Wang, Qi Xie, Huimin Chen, Guangbo Liu, Xuejing Cui, Luhua Jiang*()   

  1. Nanomaterials and Electrocatalysis Laboratory, College of Materials and Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China
  • Received:2020-12-12 Accepted:2020-12-12 Online:2021-12-18 Published:2021-09-10
  • Contact: Luhua Jiang
  • About author:* Tel/Fax: +86-532-84022907; E-mail: luhuajiang@qust.edu.cn
    First author contact:

    These authors contributed equally to this work.

  • Supported by:
    This work was supported by Taishan Scholar Program of Shandong Province(ts201712046);Key Research and Development Programme of Shandong Province(2019JZZY010905);Natural Science Foundation of Shandong Province(ZR2020MB025)

Abstract:

Low cost, highly selective and efficient electrocatalysts for CO2 reduction reaction (CO2RR) is crucial for lowering the global carbon footprint and mitigating energy shortages. Here, we first report a highly selective and efficient electrocatalyst for CO2RR to CO using a surface-regulated Ni nanoparticles supported on N-doped CMK-3 (N,O-Ni/CMK3). Compared with most Ni metal catalysts previously reported with severe competitive hydrogen evolution during the CO2RR, the N,O-Ni/CMK3 catalyst presents a superior CO faradaic efficiency of about 97%, a high CO partial current density (13.01 mA cm-1) and turnover frequency (4.25 s-1). The comprehensive characterization provides evidence that the N,O co-regulated Ni acts as the active center. Taking advantage of the N, O co-regulated chemical environment, N,O-Ni/CMK3 also displays a decent stability at negative potentials. Our work paves a novel approach for developing transition metal catalysts for CO2RR with enhanced activity and selectivity via regulating surface chemical environment.

Key words: CO2 electro-reduction reaction, Ni nanoparticle, N-doped mesoporous carbon, Surface regulation, High selectivity