https://scholars.lib.ntu.edu.tw/handle/123456789/390428
標題: | Reversible adapting layer produces robust single-crystal electrocatalyst for oxygen evolution | 作者: | Tung, Ching-Wei et al. Hsu, Ying-Ya Shen, Yen-Ping Zheng, Yixin Chan, Ting-Shan Sheu, Hwo-Shuenn Cheng, Yuan-Chung HAO MING CHEN |
公開日期: | 2015 | 卷: | 6 | 來源出版物: | Nature Communications | 摘要: | Electrochemically converting water into oxygen/hydrogen gas is ideal for high-density renewable energy storage in which robust electrocatalysts for efficient oxygen evolution play crucial roles. To date, however, electrocatalysts with long-term stability have remained elusive. Here we report that single-crystal Co3O4 nanocube underlay with a thin CoO layer results in a high-performance and high-stability electrocatalyst in oxygen evolution reaction. An in situ X-ray diffraction method is developed to observe a strong correlation between the initialization of the oxygen evolution and the formation of active metal oxyhydroxide phase. The lattice of skin layer adapts to the structure of the active phase, which enables a reversible facile structural change that facilitates the chemical reactions without breaking the scaffold of the electrocatalysts. The single-crystal nanocube electrode exhibits stable, continuous oxygen evolution for >1,000 h. This robust stability is attributed to the complementary nature of defect-free single-crystal electrocatalyst and the reversible adapting layer. © 2015 Macmillan Publishers Limited. All rights reserved. |
URI: | http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000360355200001&KeyUID=WOS:000360355200001 http://scholars.lib.ntu.edu.tw/handle/123456789/390428 |
DOI: | 10.1038/ncomms9106 | SDG/關鍵字: | oxygen; water; correlation; crystal; electrokinesis; hydrogen; oxygen; renewable resource; X-ray diffraction; Article; catalyst; chemical reaction; crystal structure; current density; density; electron diffraction; electron energy loss spectroscopy; electron microscope; oxidation; oxygen evolution; renewable energy; roentgen spectroscopy; X ray; X ray diffraction |
顯示於: | 化學系 |
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