Operando Spectroscopic Identification of Active Sites in NiFe Prussian Blue Analogues as Electrocatalysts: Activation of Oxygen Atoms for Oxygen Evolution Reaction
文献类型：期刊论文
| 作者 | Su, XZ; Wang, Y; Zhou, J; Gu, SQ; Li, J; Zhang, S |
| 刊名 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| 出版日期 | 2018 |
| 卷号 | 140期号:36页码:11286-11292 |
| 关键词 | WATER OXIDATION PEROVSKITE OXIDE NANOSHEETS CATALYSTS GENERATION HYDROXIDE HYBRID FUTURE ARRAYS |
| ISSN号 | 0002-7863 |
| DOI | 10.1021/jacs.8b05294 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Developing highly efficient oxygen evolution reaction (OER) catalysts and understanding their activity are pivotal for electrochemical conversion technologies. Here, we report NiFe Prussian blue analogue (PBA) as a promising electrocatalyst for OER in alkaline conditions. This material has an impressively low overpotential of 258 mV that reaches a current density of 10 mA cm(-2). Post-mortem characterization showed that the as-prepared catalyst is entirely transformed into amorphous nickel hydroxide after the electrochemical treatment, and Ni(OH)(2) acts as the active species. Operando X-ray spectroscopic studies further found that this in situ generated Ni(OH)(2) displays an unique feature that allows deprotonation under applied potential creating NiOOH2-x that contains Ni4+ ions. The deprotonation reaction is reversible and potential-dependent, i.e., the amount of Ni4+ increases with increasing applied potential. Theoretical calculations were used to show that the role of Ni4+ is to trigger oxidized oxygen ions as electrophilic centers with the subsequent activation of anion redox reactions for OER. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31050]  |
| 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.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, XZ,Wang, Y,Zhou, J,et al. Operando Spectroscopic Identification of Active Sites in NiFe Prussian Blue Analogues as Electrocatalysts: Activation of Oxygen Atoms for Oxygen Evolution Reaction[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2018,140(36):11286-11292. |
| APA | Su, XZ,Wang, Y,Zhou, J,Gu, SQ,Li, J,&Zhang, S.(2018).Operando Spectroscopic Identification of Active Sites in NiFe Prussian Blue Analogues as Electrocatalysts: Activation of Oxygen Atoms for Oxygen Evolution Reaction.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,140(36),11286-11292. |
| MLA | Su, XZ,et al."Operando Spectroscopic Identification of Active Sites in NiFe Prussian Blue Analogues as Electrocatalysts: Activation of Oxygen Atoms for Oxygen Evolution Reaction".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 140.36(2018):11286-11292. |
入库方式： OAI收割
来源：上海应用物理研究所
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