A nanoflower-on-nanowire heterogeneous electrocatalyst for enhanced interfacial water activation in nitrate reduction reaction

文献类型： 外文期刊

第一作者： Yu, Jingwen

作者： Yu, Jingwen;Liu, Yunliang;Fan, Cunhao;Liu, Naiyun;Li, Yaxi;Cheng, Yuanyuan;Yuan, Xinya;Zhang, Xinyue;Liu, Yixian;Li, Haitao;Yin, Jingya;Fan, Sanjun;Xu, Lei;Xu, Lei

作者机构：

关键词： active hydrogen; electron transfer; nitrate; ammonia

期刊名称：NANO RESEARCH （ 影响因子：9.0； 五年影响因子：8.7 ）

ISSN： 1998-0124

年卷期： 2025 年 18 卷 2 期

页码：

收录情况： SCI

摘要： Electrocatalytic nitrate reduction reaction (NitRR) is an efficient route for simultaneous wastewater treatment and ammonia production, but the conversion of NO3- to NH3 involves multiple electron and proton transfer processes and diverse by-products. Therefore, developing ammonia catalysts with superior catalytic activity and selectivity is an urgent task. The distinctive electronic structure of Cu enhances the adsorption of nitrogen-containing intermediates, but the insufficient activation capability of Cu for interfacial water restricts the generation of reactive hydrogen and inhibits the hydrogenation process. In this work, a Ce-doped CuO catalyst (Ce10/CuO) was synthesized by in situ oxidative etching and annealing. The redox of Ce3+/Ce4+enables the optimization of the electronic structure of the catalyst, and the presence of Ce3+ as a defect indicator introduces more oxygen vacancies. The results demonstrate that Ce10/CuO provides an impressive ammonia yield of 3.88 +/- 0.14 mmolcm-2h-1 at 0.4 V vs. reversible hydrogen electrode (RHE) with an increase of 1.04 mmolcm-2h-1 compared to that of pure CuO, and the Faradaic efficiencies (FE) reaches 93.2% +/- 3.4%. In situ characterization confirms the doping of Ce facilitates the activation and dissociation of interfacial water, which promotes the production of active hydrogen and thus enhances the ammonia production efficiency.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序