CoSe2 nanowire array enabled highly efficient electrocatalytic reduction of nitrate for ammonia synthesis

Ting Xie ¹Xun He ²Lang He ²Kai Dong ³Yongchao Yao ²Zhengwei Cai ³Xuwei Liu ²Xiaoya Fan ²Tengyue Li ²Dongdong Zheng ²Shengjun Sun ³Luming Li ⁴Wei Chu ⁴Asmaa Farouk ⁵Mohamed S.Hamdy ⁵Chenggang Xu ¹Qingquan Kong ⁴Xuping Sun⁶

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作者信息

1. College of Chemistry and Materials Science,Sichuan Normal University,Chengdu 610068,China
2. Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 610054,China
3. College of Chemistry,Chemical Engineering and Materials Science,Shandong Normal University,Ji'nan 250014,China
4. Institute for Advanced Study,Chengdu University,Chengdu 610106,China
5. Department of Chemistry,College of Science,King Khalid University,P.O.Box 9004,61413 Abha,Saudi Arabia
6. Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 610054,China;College of Chemistry,Chemical Engineering and Materials Science,Shandong Normal University,Ji'nan 250014,China
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Abstract

The electrocatalytic reduction of nitrate(NO3-)not only facilitates the environmentally sustainable pro-duction of ammonia(NH3)but also purifies water by removing NO3-,thereby transforming waste into valuable resources.The process of converting NO3-to NH3 is complex,involving eight electron transfers and multiple intermediates,making the choice of electrocatalyst critical.In this study,we report a cobalt selenide(CoSe2)nanowire array on carbon cloth(CoSe2/CC)as an effective electrocatalyst for the NO3-to NH3 conversion.In an alkaline medium with 0.1 mol/L NO3-,CoSe2/CC demonstrates exceptional NH3 Faradaic efficiency of 97.6％and a high NH3 yield of 517.7 μmol h-1 cm-2 at-0.6 V versus the reversible hydrogen electrode.Furthermore,insights into the reaction mechanism of CoSe2 in the electrocatalytic NO3-reduction are elucidated through density functional theory calculations.

Key words

CoSe2/Electrocatalytic nitrate reduction/NH3 synthesis/Electrocatalysis/Density functional theory calculation

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出版年

2024

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCDCSCD

影响因子：0.771

ISSN：1001-8417

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