Synthesis and Demonstration of Subnanometric iridium Oxide as Highly Efficient and Robust Water Oxidation Catalyst

doi:10.1021/acscatal.7b02082

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	Synthesis and Demonstration of Subnanometric iridium Oxide as Highly Efficient and Robust Water Oxidation Catalyst
	Guan, JQ; Li, D; Si, R; Miao, S; Zhang, FX; Li, C
	2017
发表期刊	ACS CATALYSIS
ISSN	2155-5435
卷号	7 期号:9 页码:5983-5986
文章类型	期刊论文
摘要	Development of a highly efficient and robust water oxidation catalyst (WOC) with reduced usage of noble metals is extremely crucial for water splitting and CO, reduction by photocatalysis or electrolysis. Herein, we synthesized subnanometric iridium dioxide clusters supported on multiwalled carbon nanotubes (MWCNTs) by a chemical vapor deposition method (nominated as IrO2/CNT). Benefiting from a mild oxidation process in air at 303 K, the deposited iridium clusters can be controlled to have a narrow size distribution from several atoms to 2 nm, having an average size of ca. 1.1 nm. The subnanometric iridium-containing sample is demonstrated to be highly efficient and robust for water oxidation. The optimal turnover frequency (TOF) of chemical water oxidation on the as-obtained sample can reach 11.2 s(-1), and the overpotential of electrochemical water oxidation is 249, and 293 mV at 10 mA cm(-2) in 1.0 M KOH (pH: 13.6), and 0.5 M H2SO4 (pH: 0), respectively. On the basis of the structural characterizations and theory simulation, the extraordinary performances of the ultrasmall iridium dioxide are proposed to mainly originate from enhanced number of unsaturated surface Ir atoms and change of local coordination environment. Our work highlights the importance of subnanometric size of iridium dioxide in water oxidation.
关键词	Oxygen Evolution Reaction Metal-oxides Thin-films Iro2 Films Deposition Electrocatalysts
DOI	10.1021/acscatal.7b02082
关键词[WOS]	OXYGEN EVOLUTION REACTION ; METAL-OXIDES ; THIN-FILMS ; IRO2 FILMS ; DEPOSITION ; ELECTROCATALYSTS
收录类别	SCI
语种	英语
WOS记录号	WOS:000410005700046
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/28848
专题	中科院上海应用物理研究所2011-2018年
推荐引用方式 GB/T 7714	Guan, JQ,Li, D,Si, R,et al. Synthesis and Demonstration of Subnanometric iridium Oxide as Highly Efficient and Robust Water Oxidation Catalyst[J]. ACS CATALYSIS,2017,7(9):5983-5986.
APA	Guan, JQ,Li, D,Si, R,Miao, S,Zhang, FX,&Li, C.(2017).Synthesis and Demonstration of Subnanometric iridium Oxide as Highly Efficient and Robust Water Oxidation Catalyst.ACS CATALYSIS,7(9),5983-5986.
MLA	Guan, JQ,et al."Synthesis and Demonstration of Subnanometric iridium Oxide as Highly Efficient and Robust Water Oxidation Catalyst".ACS CATALYSIS 7.9(2017):5983-5986.

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