https://scholars.lib.ntu.edu.tw/handle/123456789/639994
標題: | Crystal Phase Engineering of Ultrathin Alloy Nanostructures for Highly Efficient Electroreduction of Nitrate to Ammonia | 作者: | Wang, Yunhao Hao, Fengkun Sun, Mingzi Liu, Meng-Ting Zhou, Jingwen Xiong, Yuecheng Ye, Chenliang Wang, Xixi Liu, Fu Wang, Juan Lu, Pengyi Ma, Yangbo Yin, Jinwen Chen, Hsiao-Chien Zhang, Qinghua Gu, Lin HAO MING CHEN Huang, Bolong Fan, Zhanxi |
關鍵字: | ammonia; crystal phase engineering; electrocatalysis; nitrate reduction reaction; ultrathin alloy nanostructures | 公開日期: | 26-一月-2024 | 來源出版物: | Advanced materials (Deerfield Beach, Fla.) | 摘要: | Electrocatalytic nitrate reduction reaction (NO3 RR) toward ammonia synthesis is recognized as a sustainable strategy to balance the global nitrogen cycle. However, it still remains a great challenge to achieve highly efficient ammonia production due to the complex proton-coupled electron transfer process in NO3 RR. Here, the controlled synthesis of RuMo alloy nanoflowers (NFs) with unconventional face-centered cubic (fcc) phase and hexagonal close-packed/fcc heterophase for highly efficient NO3 RR is reported. Significantly, fcc RuMo NFs demonstrate high Faradaic efficiency of 95.2% and a large yield rate of 32.7 mg h-1 mgcat -1 toward ammonia production at 0 and -0.1 V (vs reversible hydrogen electrode), respectively. In situ characterizations and theoretical calculations have unraveled that fcc RuMo NFs possess the highest d-band center with superior electroactivity, which originates from the strong Ru─Mo interactions and the high intrinsic activity of the unconventional fcc phase. The optimal electronic structures of fcc RuMo NFs supply strong adsorption of key intermediates with suppression of the competitive hydrogen evolution, which further determines the remarkable NO3 RR performance. The successful demonstration of high-performance zinc-nitrate batteries with fcc RuMo NFs suggests their substantial application potential in electrochemical energy supply systems. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/639994 | ISSN: | 09359648 | DOI: | 10.1002/adma.202313548 |
顯示於: | 化學系 |
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