Increased SO2 electrooxidation activity on a copper-nitrogen doped catalyst and its active sites analysis

doi:10.1016/j.ijhydene.2017.12.153

	Increased SO2 electrooxidation activity on a copper-nitrogen doped catalyst and its active sites analysis
	Zhao, Qing 1,2; Hou, Ming 1; Jiang, Shangfeng 1,2; Ai, Jun 1; Zheng, Limin 1; Shao, Zhigang 1
刊名	INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
	2018-02-01
卷号	43 期号:5 页码:2794-2802
关键词	So2 Electrooxidation Cu-n Doped Doping(i)-cu@n-c Active Site Prereduction Chitosan
ISSN号	0360-3199
DOI	10.1016/j.ijhydene.2017.12.153
文献子类	Article
英文摘要	It's a meaningful work to develop a highly active nonprecious SO2 electrooxidation catalyst, replacing the Pt-based ones. Here, a novel Cu-N doped carbon-based catalyst is synthesized by pyrolyzing the imidazole chelated copper ions on the chitosan modified carbon BP2000. During the preparation, metallic Cu is developed and encapsulated in the carbon lattices, and transformed into the CuNx structures on the catalyst surface, simultaneously. Metallic Cu plays significant role in the doping and developing of active sites, which have vital effects on the catalysis activity. The prereduction of Cu2+ by NaBH4 during the preparation of Doping(I)-Cu@N-C makes great contribution to the development of metallic Cu, which highly dispersive anchor in the carbon lattices. This as-synthesized Doping(I)-Cu@N-C catalyst exhibits excellent SO2 electrooxidation activity. Its SO2 oxidation currents are remarkably increased with the elevation of applied potentials, and the oxidation performances prominently surpass the commercial Pt/C, when the potential is above 0.822 V. The peak SO2 oxidation current (i(p)) of Doping(I)-Cu@N-C is 7.17 mA cm(-2) @ 0.684 V, much higher than the 3.03 mA cm(-2)@ 0.584 V of Pt/C with the same mass loading. In the chronoamperometry tests under 1.2 V, the terminal oxidation current of Doping(I)-Cu@N-C was 1.74 times as high as that of Pt/C, indicating that this prepared catalyst also displays much better SO2 electrooxidation activity than Pt/C under constant applied potentials. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
WOS关键词	OXYGEN REDUCTION REACTION ; POLYCRYSTALLINE GOLD ELECTRODES ; SULFUR-DIOXIDE ; AQUEOUS SO2 ; ELECTROCHEMICAL-BEHAVIOR ; ACIDIC MEDIA ; SO2-DEPOLARIZED ELECTROLYSIS ; CARBON NANOFIBERS ; C CATALYST ; OXIDATION
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000425563200023
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/168748]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Hou, Ming; Shao, Zhigang
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell Syst & Engn Lab, 457 Zhongshan Rd, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Qing,Hou, Ming,Jiang, Shangfeng,et al. Increased SO2 electrooxidation activity on a copper-nitrogen doped catalyst and its active sites analysis[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2018,43(5):2794-2802.
APA	Zhao, Qing,Hou, Ming,Jiang, Shangfeng,Ai, Jun,Zheng, Limin,&Shao, Zhigang.(2018).Increased SO2 electrooxidation activity on a copper-nitrogen doped catalyst and its active sites analysis.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,43(5),2794-2802.
MLA	Zhao, Qing,et al."Increased SO2 electrooxidation activity on a copper-nitrogen doped catalyst and its active sites analysis".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 43.5(2018):2794-2802.