Expediting in-Situ Electrochemical Activation of Two-Dimensional Metal-Organic Frameworks for Enhanced OER Intrinsic Activity by Iron Incorporation

doi:10.1021/acscatal.9b00072

CORC > 化学研究所 > 中国科学院化学研究所

	Expediting in-Situ Electrochemical Activation of Two-Dimensional Metal-Organic Frameworks for Enhanced OER Intrinsic Activity by Iron Incorporation
	Zou, Zehua; Wang, Tongtong; Zhao, Xiaohua; Jiang, Wen-Jie; Pan, Hairui; Gao, Daqiang; Xu, Cailing
刊名	ACS CATALYSIS
	2019-08-01
卷号	9 期号:8 页码:7356-7364
ISSN号	2155-5435
DOI	10.1021/acscatal.9b00072
英文摘要	Electrochemical activation is an effective and simple method to obtain in-situ surface modification of MOF materials away from thermal decomposition. However, the impact of the rate and related phase transformation on OER intrinsic activity during the electrochemical activation process is often overlooked. Herein, we synthesized a kind of Co-MOF with a unique crystal structure in which the center metals were coordinated with the oxygen and nitrogen atoms from two water molecules and organic linkers. The bond strength between the center metals and the coordinated water molecules can be modulated by introducing Fe into Co-MOF, causing the expedited electrochemical activation. First-principles calculations suggest the electronic state of cobalt in CoFe-MOF can be modified to alter the free energy of adsorbed intermediates. Therefore, the obtained electrocatalyst possesses the optimal OER intrinsic activity, showing a low overpotential of 265 mV at 10 mA cm(-2), a small Tafel slope of 44 mV dec(-1), and a long-term electrochemical durability with a period of 40 h. The findings are expected to help understand the fundamental principles of electrochemical activation.
语种	英语
WOS记录号	WOS:000480503700078
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/82696]
专题	中国科学院化学研究所
作者单位	Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zou, Zehua,Wang, Tongtong,Zhao, Xiaohua,et al. Expediting in-Situ Electrochemical Activation of Two-Dimensional Metal-Organic Frameworks for Enhanced OER Intrinsic Activity by Iron Incorporation[J]. ACS CATALYSIS,2019,9(8):7356-7364.
APA	Zou, Zehua.,Wang, Tongtong.,Zhao, Xiaohua.,Jiang, Wen-Jie.,Pan, Hairui.,...&Xu, Cailing.(2019).Expediting in-Situ Electrochemical Activation of Two-Dimensional Metal-Organic Frameworks for Enhanced OER Intrinsic Activity by Iron Incorporation.ACS CATALYSIS,9(8),7356-7364.
MLA	Zou, Zehua,et al."Expediting in-Situ Electrochemical Activation of Two-Dimensional Metal-Organic Frameworks for Enhanced OER Intrinsic Activity by Iron Incorporation".ACS CATALYSIS 9.8(2019):7356-7364.