影像科学与光化学 ›› 2019, Vol. 37 ›› Issue (2): 107-117.DOI: 10.7517/issn.1674-0475.181208

• 综述与论文 • 上一篇    下一篇

氮化铌电催化还原CO2

李文廷1,3, 侯朋飞1,3, 康鹏1,2,3   

  1. 1. 中国科学院 理化技术研究所 光化学转换与功能材料重点实验室, 北京 100190;
    2. 天津大学 化学院, 天津 300350;
    3. 中国科学院大学, 北京 100049
  • 收稿日期:2018-12-26 修回日期:2019-01-08 出版日期:2019-03-15 发布日期:2019-03-15
  • 通讯作者: 康鹏
  • 基金资助:
    国家基础研究开发重点项目(2016YFB0600901)

Niobium Nitride Catalyst for Electrocatalytic Reduction of CO2

LI Wenting1,3, HOU Pengfei1,3, KANG Peng1,2,3   

  1. 1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
    2. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China;
    3. University of Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2018-12-26 Revised:2019-01-08 Online:2019-03-15 Published:2019-03-15
  • Supported by:
    National Key R&D Projects of China (2016YFB0600901)

摘要: 通过电化学的方法将CO2转化为CO是解决资源和环境问题的经济友好的策略。在本次工作中,利用湿化学方法制备了铌/碳的前驱体,在NH3和Ar氛围下煅烧后分别转化为Nb4N5/C和Nb2O5/C。当氮化温度达到700℃时,制备的Nb4N5/C表现出优异的催化活性,在CO2饱和的0.5 mol·L-1的NaCl溶液中,电解电位为-0.83V(RHE)时,CO的法拉第效率最高,达到57%。实验结果表明,Nb4N5/C的催化活性与Nb4N5中的N掺杂有关。

关键词: 氮化铌, 电催化, CO2还原, CO

Abstract: Converting CO2 to CO by electrochemical method is considered as an economic and friendly strategy to solve problems of resource and environment. In this work, precursor of niobium/carbon was prepared by wet chemical method and converted into Nb4N5/C and Nb2O5/C after calcination under NH3 and Ar respectively. When the nitriding temperature reaches to 700℃, prepared Nb4N5/C exhibits excellent catalytic activity with CO Faradaic efficiency of 57% at -0.83 V vs RHE in CO2 saturated 0.5 mol·L-1 NaCl solution. The results show that the catalytic activity of Nb4N5/C is related to the N doping in Nb4N5.

Key words: niobium nitride, electrocatalysis, CO2 reduction, CO