The 3d-5d orbital repulsion of transition metals in oxyhydroxide catalysts facilitates water oxidation
文献类型：期刊论文
| 作者 | Wang, L; Wen, YZ; Ji, YJ; Cao, HJ; Li, SY; He, SS; Bai, HP; Liu, GJ; Zhang, LS; Bao, HL |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
 |
| 出版日期 | 2019 |
| 卷号 | 7期号:24页码:14455-14461 |
| ISSN号 | 2050-7488 |
| 关键词 | OXYGEN STATE ELECTROCATALYSTS IDENTIFICATION IRIDIUM NIOOH SITES NI |
| DOI | 10.1039/c9ta03542g |
| 文献子类 | 期刊论文 |
| 英文摘要 | The electrocatalytic oxygen-evolution reaction (OER) is expected to play a vital role in the development of electrochemical energy conversion and storage technologies. 3d transition-metal oxyhydroxides have been reported to outperform noble metal-based catalysts for the OER, but the relatively localized properties of 3d electrons limit the sufficient modulation of their electronic structures by dopants, which may inhibit further improvement of their OER performances. Herein, through density functional theory (DFT) calculation, we found that 5d transition metals such as iridium (Ir) with unique electronic properties can effectively modulate 3d transition-metal oxyhydroxides, thus producing versatile electronic structures to facilitate the OER activity. We therefore synthesized NiFe(3d)Ir(5d) oxyhydroxides and explored their electronic structures via in situ and ex situ X-ray absorption spectroscopy (XAS) and valence band X-ray photoelectron spectroscopy (VB-XPS). The DFT, XAS, VB-XPS and electrochemical studies demonstrated that Ir served as a modulator in the 3d metal oxyhydroxide framework, and created a local environment favoring 3d-5d orbital interaction, and the repelled Ni 3d orbitals facilitated the overall OER process. The Ir-doped catalyst on a glassy carbon electrode delivers 133 mV lower overpotential to achieve a current density of 10 mA cm(-2) in an alkaline electrolyte, a 53-fold improved turnover frequency (TOF) over that of pristine NiFe oxyhyroxides, with negligible activity decay after 500 hours of operation. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32240]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Peoples R China; 2.Fudan Univ, Dept Macromol Sci, Adv Mat Lab, State Key Lab Mol Engn Polymers, Shanghai 200438, Peoples R China; 3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China; 4.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, L,Wen, YZ,Ji, YJ,et al. The 3d-5d orbital repulsion of transition metals in oxyhydroxide catalysts facilitates water oxidation[J]. JOURNAL OF MATERIALS CHEMISTRY A,2019,7(24):14455-14461. |
| APA | Wang, L.,Wen, YZ.,Ji, YJ.,Cao, HJ.,Li, SY.,...&Peng, HS.(2019).The 3d-5d orbital repulsion of transition metals in oxyhydroxide catalysts facilitates water oxidation.JOURNAL OF MATERIALS CHEMISTRY A,7(24),14455-14461. |
| MLA | Wang, L,et al."The 3d-5d orbital repulsion of transition metals in oxyhydroxide catalysts facilitates water oxidation".JOURNAL OF MATERIALS CHEMISTRY A 7.24(2019):14455-14461. |
入库方式： OAI收割
来源：上海应用物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。