Achieving delafossite analog by in situ electrochemical self-reconstruction as an oxygen-evolving catalyst
文献类型：期刊论文
| 作者 | Liu, JZ; Hu, Q; Wang, Y; Yang, Z; Fan, XY; Liu, LM; Guo, L |
| 刊名 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
 |
| 出版日期 | 2020 |
| 卷号 | 117期号:36页码:21906-21913 |
| 关键词 | EVOLUTION ELECTROCATALYSTS OXIDE OXIDATION COOOH CO CONVERSION ENERGY PHASE |
| ISSN号 | 0027-8424 |
| DOI | 10.1073/pnas.2009180117 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Development of novel and robust oxygen evolution reaction (OER) catalysts with well-modulated atomic and electronic structure remains a challenge. Compared to the well-known metal hydroxides or (oxyhydr)oxides with lamellar structure, delafossites (ABO(2)) are characterized by alternating layers of A cations and edge-sharing BO2 octahedra, but are rarely used in OER due to their poor electron conductivity and intrinsic activity. Here, we propose a delafossite analog by mutation of metal oxyhydroxide and delafossite based on first-principles calculations. Modulation on the electronic structure due to distortion of the original crystal field of the BO2 layers is calculated to enhance electron conductivity and catalytic activity. Inspired by the theoretical design, we have experimentally realized the delafossite analog by electrochemical self-reconstruction (ECSR). Operando X-ray absorption spectroscopy and other experimental techniques reveal the formation of delafossite analog with Ag intercalated into bimetallic cobalt-iron (oxyhydr) oxide layers from a metastable precursor through amorphization. Benefirting from the featured local electronic and geometric structures, the delafossite analog shows superior OER activity, affording a current density of 10 mA.cm(-2) at an overpotential of 187 mV and an excellent stability (300 h) in alkaline conditions. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32691]  |
| 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.Beijing Computat Sci Res Ctr, Beijing 100193, Peoples R China 2.Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Key Lab Bioinspired Smart Interfacial Sci & Techn, Sch Chem, Beijing 100191, Peoples R China 3.Beihang Univ, Sch Phys, Beijing 100191, Peoples R China 4.Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, JZ,Hu, Q,Wang, Y,et al. Achieving delafossite analog by in situ electrochemical self-reconstruction as an oxygen-evolving catalyst[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(36):21906-21913. |
| APA | Liu, JZ.,Hu, Q.,Wang, Y.,Yang, Z.,Fan, XY.,...&Guo, L.(2020).Achieving delafossite analog by in situ electrochemical self-reconstruction as an oxygen-evolving catalyst.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(36),21906-21913. |
| MLA | Liu, JZ,et al."Achieving delafossite analog by in situ electrochemical self-reconstruction as an oxygen-evolving catalyst".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.36(2020):21906-21913. |
入库方式： OAI收割
来源：上海应用物理研究所
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