Synthesis and Demonstration of Subnanometric iridium Oxide as Highly Efficient and Robust Water Oxidation Catalyst
文献类型：期刊论文
| 作者 | Guan, Jingqi1; Li, Deng1; Si, Rui2; Miao, Shu1; Zhang, Fuxiang1; Li, Can1 |
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2017-09-01 |
| 卷号 | 7期号:9页码:5983-5986 |
| 关键词 | Water Oxidation Electrocatalysis Density Functional Calculations Iridium Oxide Subnanometer |
| ISSN号 | 2155-5435 |
| DOI | 10.1021/acscatal.7b02082 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| WOS关键词 | OXYGEN EVOLUTION REACTION ; METAL-OXIDES ; THIN-FILMS ; IRO2 FILMS ; DEPOSITION ; ELECTROCATALYSTS |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000410005700046 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/168316]  |
| 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 | Zhang, Fuxiang; Li, Can |
| 作者单位 | 1.Chinese Acad Sci, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, iChEM,Dalian Inst Chem Phys, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guan, Jingqi,Li, Deng,Si, Rui,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, Jingqi,Li, Deng,Si, Rui,Miao, Shu,Zhang, Fuxiang,&Li, Can.(2017).Synthesis and Demonstration of Subnanometric iridium Oxide as Highly Efficient and Robust Water Oxidation Catalyst.ACS CATALYSIS,7(9),5983-5986. |
| MLA | Guan, Jingqi,et al."Synthesis and Demonstration of Subnanometric iridium Oxide as Highly Efficient and Robust Water Oxidation Catalyst".ACS CATALYSIS 7.9(2017):5983-5986. |
入库方式： OAI收割
来源：大连化学物理研究所
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