Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (9): 1048-1055.DOI: 10.11944/j.issn.1000-0518.2020.09.200085

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Polyvalent MnOx/C Electrocatalyst for Highly Efficient Nitrogen Reduction Reaction

BI Yipiaoa,b, GONG Xuea, YANG Faa,b, RUAN Mingboa, SONG Pinga, XU Weilina,b*   

  1. aAdvanced Power Laboratory,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;
    bUniversity of Science and Technology of China,Hefei 230026,China
  • Received:2020-03-22 Online:2020-09-01 Published:2020-09-09
  • Contact: XU Weilin, professor; Tel:0431-85262848; E-mail:weilinxu@ciac.ac.cn; Research Interests:electrocatalysis
  • Supported by:
    Supported by the National Science Foundation for Distinguished Young Scholars of China(No.21925205), the Guangdong Joint Fund(No.U1601211), and the National Natural Science Foundation of China(No.21733004,No.21633008,No.2017YFE9127900, No.21721003,No.2018YFB1502302,No.21433003)

Abstract: NH3 plays an important role in human production and life, but the main way to produce NH3 is still the high energy consumption and high pollution Haber-Bosch process. Electrocatalytic N2 reduction reaction (ENRR) is considered to be an effective alternative method, however highly efficient catalyst is still a challenging as a result of high bond energy of NN. Here, we report an electrocatalyst of polyvalent MnOx/C which is designed via simple redox reaction for highly efficient production of ammonia (with yield up to 7.8 μgNH3/(h·mgcat) and Faradic efficiency (FE) up to 9.2%) from nitrogen reduction reaction (NRR). The high NRR performance of polyvalent MnOx/C mainly originates from a synergistic effect among different valence states (Mn2+, Mn3+, Mn4+) of Mn for NRR.

Key words: ammonia synthesis, electrocatalysis, transition metal oxide, synergistic effect