Li Chunjie, Liu Songliang, Xu You, Ren Tianlun, Guo Yanan, Wang Ziqiang, Li Xiaonian, Wang Liang, Wang Hongjing
State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China.
School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, China.
Nanoscale. 2022 Sep 2;14(34):12332-12338. doi: 10.1039/d2nr03767j.
The electrochemical reduction of nitrate to ammonia provides a green and delocalized route for ammonia synthesis under ambient conditions, which requires advanced catalysts with high activity and selectivity. In this work, we propose a two-step conversion strategy to construct hierarchical copper nanosheet-based Cu nanotubes using pre-synthesized Cu nanowires as the starting material for the electrocatalytic nitrate reduction reaction (NORR). The conversion of Cu nanowires into Cu nanotubes could be realized through chemical oxidation followed by electrochemical reduction, enabling the effective engineering of active sites and thus boosting the electrocatalytic nitrate-to-ammonia capability. Such a controllable reconstruction strategy provides a new avenue for constructing high-performance electrocatalysts for sustainable NH synthesis and the elimination of NO contamination.
硝酸盐电化学还原为氨为环境条件下的氨合成提供了一条绿色且分散的途径，这需要具有高活性和选择性的先进催化剂。在这项工作中，我们提出了一种两步转化策略，以预合成的铜纳米线作为电催化硝酸盐还原反应（NORR）的起始材料，构建基于分级铜纳米片的铜纳米管。通过化学氧化然后电化学还原，可以实现铜纳米线向铜纳米管的转化，从而有效地设计活性位点，进而提高电催化硝酸盐制氨的能力。这种可控的重构策略为构建用于可持续氨合成和消除硝酸盐污染的高性能电催化剂提供了一条新途径。
