Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (6): 1024-1029.DOI: 10.1016/S1872-2067(20)63704-4

• Article • Previous Articles     Next Articles

Commercial indium-tin oxide glass: A catalyst electrode for efficient N2 reduction at ambient conditions

Ting Wanga,†, Shaoxiong Lia,†, Bingling Heb, Xiaojuan Zhua, Yonglan Luoa,*(), Qian Liuc, Tingshuai Lic, Siyu Lud, Chen Yee, Abdullah M. Asirif, Xuping Sunc,#()   

  1. aChemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, Sichuan, China
    bCollege of Physics and Electronic Engineering, Xinxiang University, Xinxiang 453003, Henan, China
    cInstitute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China
    dGreen Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, China
    eCollege of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
    fChemistry Department, Faculty of Science & Center of Excellence for Advanced Materials Research, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
  • Received:2020-03-22 Accepted:2020-07-27 Online:2021-06-18 Published:2021-01-30
  • Contact: Yonglan Luo,Xuping Sun
  • About author:# E-mail: xpsun@uestc.edu.cn
    *E-mail: luoylcwnu@hotmail.com;
    First author contact:

    Contributed equally to this work.

Abstract:

The typical Haber technical process for industrial NH3 production involves plenty of energy-consumption and large quantities of greenhouse gas emission. In contrast, electrochemical N2 reduction proffers environment-friendly and energy-efficient avenues to synthesize NH3 at mild conditions but demands efficient electrocatalysts for the N2 reduction reaction (NRR). Herein we report for the first time that commercial indium-tin oxide glass (ITO/G) can be used as a catalyst electrode toward artificial N2 fixation, as it demonstrates excellent selectivity at mild conditions. Such ITO/G delivers excellent NRR performance with a NH3 yield of 1.06 × 10-10 mol s-1 cm-2 and a faradaic efficiency of 6.17% at -0.40 V versus the reversible hydrogen electrode (RHE) in 0.5 M LiClO4. Furthermore, the ITO/G also possesses good electrochemical stability and durability. Finally, the possible reaction mechanism for the NRR on the ITO catalysts was explored using first-principles calculations.

Key words: N2 reduction reaction, NH3, Indium-tin oxide, Electrocatalyst, Ambient conditions, Density functional theory