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Title: Robust bifunctional oxygen electrocatalyst with a “rigid and flexible” structure for air-cathodes
Authors: Fu, Gengtao
Jiang, Xian
Chen, Yifan
Xu, Lin
Sun, Dongmei
Lee, Jong-Min
Tang, Yawen
Keywords: DRNTU::Engineering::Chemical engineering
Oxygen Electrocatalyst
Issue Date: 2018
Source: Fu, G., Jiang, X., Chen, Y., Xu, L., Sun, D., Lee, J.-M., & Tang, Y. (2018). Robust bifunctional oxygen electrocatalyst with a “rigid and flexible” structure for air-cathodes. NPG Asia Materials, 10(7), 618-629. doi:10.1038/s41427-018-0057-y
Series/Report no.: NPG Asia Materials
Abstract: The development of highly active air-cathodes with robust stability and a low price is of crucial significance for rechargeable Zn–air batteries and remains a great challenge. Herein, for the first time, we report a “rigid and flexible” material consisting of three-dimensional (3D) porous nickel-manganese oxide (Ni6MnO8) coupled with 1D ultrathin Au nanowires (Au-NWs) as an efficient bifunctional oxygen electrocatalyst, adopting α-naphthol-Au(III) as a precursor of Au-NWs and pre-formed Ni6MnO8 as a support. Ni6MnO8 acts not only as a robust carbon-free support that is stable in alkaline electrochemical conditions, but also as a highly active component for the oxygen evolution reaction (OER), while flexible Au-NWs contribute to the excellent oxygen reduction reaction (ORR) activity and act as a flexible conductive electronic network. The coupling of Ni6MnO8 and Au-NWs plays a complementary role in the two types of oxygen electrocatalytic reactions. Accordingly, their advantages have been optimally harnessed while overcoming their deficiencies. Moreover, a Zn–air battery assembled with such a rigid and flexible air-cathode has lower charge and discharge overpotentials and a higher cyclic stability than those with a mixed Pt/C+RuO2 catalyst.
ISSN: 1884-4049
DOI: 10.1038/s41427-018-0057-y
Rights: © 2018 The Author(s) (Nature Publishing Group). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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