Highly ordered Nb2O5 nanochannel film with rich oxygen vacancies for electrocatalytic N-2 reduction: Inactivation and regeneration of electrode

doi:10.1016/j.cclet.2021.01.020

	Highly ordered Nb2O5 nanochannel film with rich oxygen vacancies for electrocatalytic N-2 reduction: Inactivation and regeneration of electrode
	Wang, Jialu 1,2; Kang, Shenghong 2; Zhu, Xiaoguang 2; Wang, Guozhong 2; Zhang, Haimin 2
刊名	CHINESE CHEMICAL LETTERS
	2021-09-01
卷号	32
关键词	Niobium oxide (Nb2O5) Nitrogen (N-2) reduction reaction (NRR) Electrochromism Oxygen vacancies Phase transformation
ISSN号	1001-8417
DOI	10.1016/j.cclet.2021.01.020
通讯作者	Kang, Shenghong(shkang@issp.ac.cn) ; Zhang, Haimin(zhanghm@issp.ac.cn)
英文摘要	We report the fabrication of highly ordered Nb2O5 nanochannel film (Nb2O5-NCF) onto niobium foil by an anodization method. After thermal treatment, the obtained Nb2O5-NCF with rich oxygen vacancies exhibits electrochemical N-2 reduction reaction (NRR) activity with an NH3 yield rate of 2.52 x 10(-10) mol Cm(-2)s(-1) and a faradaic efficiency of 9.81% at -0.4 V (vs. RHE) in 0.1 mol/L Na2SO4 electrolyte (pH 3.2). During electrocatalytic NRR, the Nb2O5-NCF takes place electrochromism (EC), along with a crystalline phase transformation from pseudo hexagonal phase to hexagonal phase owing to H+ insertion. This results in the reduced NRR activity due to the decrease of oxygen vacancies of hexagonal phase Nb2O5, which can be readily regenerated by low-temperature thermal treatment or applying an anodic potential, showing superior recycling reproducibility. (C) 2021 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
资助项目	National Key Research and Development Program of China[2017YFA0207203] ; Natural Science Foundation of China[51872292]
WOS关键词	ATMOSPHERIC-PRESSURE ; AMMONIA ; NITROGEN ; WATER ; CARBON ; NH3 ; ELECTROSYNTHESIS ; TEMPERATURE ; CHEMISTRY ; FIXATION
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000735948800015
资助机构	National Key Research and Development Program of China ; Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127185]
专题	中国科学院合肥物质科学研究院
通讯作者	Kang, Shenghong; Zhang, Haimin
作者单位	1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Key Lab Mat Phys, Ctr Environm & Energy Nanomat, Anhui Key Lab Nanomat & Nanotechnol,Inst Solid St, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jialu,Kang, Shenghong,Zhu, Xiaoguang,et al. Highly ordered Nb2O5 nanochannel film with rich oxygen vacancies for electrocatalytic N-2 reduction: Inactivation and regeneration of electrode[J]. CHINESE CHEMICAL LETTERS,2021,32.
APA	Wang, Jialu,Kang, Shenghong,Zhu, Xiaoguang,Wang, Guozhong,&Zhang, Haimin.(2021).Highly ordered Nb2O5 nanochannel film with rich oxygen vacancies for electrocatalytic N-2 reduction: Inactivation and regeneration of electrode.CHINESE CHEMICAL LETTERS,32.
MLA	Wang, Jialu,et al."Highly ordered Nb2O5 nanochannel film with rich oxygen vacancies for electrocatalytic N-2 reduction: Inactivation and regeneration of electrode".CHINESE CHEMICAL LETTERS 32(2021).