您好，欢迎访问江苏省农业科学院 机构知识库！
江苏省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Mechanochemical route to fabricate an efficient nitrate reduction electrocatalyst

文献类型： 外文期刊

作者： Liu, Yunliang 1 ; Zheng, Zhiyu 2 ; Jabeen, Sobia 1 ; Liu, Naiyun 1 ; Liu, Yixian 1 ; Cheng, Yuanyuan 1 ; Li, Yaxi 1 ; Yu, Jingwen 1 ; Wu, Xin 1 ; Yan, Nina 2 ; Xu, Lei 2 ; Li, Haitao 1 ;

作者机构： 1.Jiangsu Univ, Inst Energy Res, Sch Energy & Power Engn, Zhenjiang 212013, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Jiangsu Engn Technol Res Ctr Biomass Composites &, Nanjing 210014, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Protected Agr Engn Middle & Lower Reaches, Nanjing 210014, Peoples R China

关键词： mechanochemical route; magnetic biochar; electron transfer; nitrate; ammonia

期刊名称：NANO RESEARCH （ 影响因子：9.9； 五年影响因子：9.2 ）

ISSN： 1998-0124

年卷期： 2024 年

页码：

收录情况： SCI

摘要： The electrochemical nitrate reduction reaction (NO3RR) to ammonia under ambient conditions is a promising approach for addressing elevated nitrate levels in water bodies, but the progress of this reaction is impeded by the complex series of chemical reactions involving electron and proton transfer and competing hydrogen evolution reaction. Therefore, it becomes imperative to develop an electro-catalyst that exhibits exceptional efficiency and remarkable selectivity for ammonia synthesis while maintaining long-term stability. Herein the magnetic biochar (Fe-C) has been synthesized by a two-step mechanochemical route after a pyrolysis treatment (450, 700, and 1000 degrees C), which not only significantly decreases the particle size, but also exposes more oxygen-rich functional groups on the surface, promoting the adsorption of nitrate and water and accelerating electron transfer to convert it into ammonia. Results showed that the catalyst (Fe-C-700) has an impressive NH3 production rate of 3.5 mol center dot h-1 center dot gcat-1, high Faradaic efficiency of 88%, and current density of 0.37 A center dot cm-2 at 0.8 V vs. reversible hydrogen electrode (RHE). In-situ Fourier transform infrared spectroscopy (FTIR) is used to investigate the reaction intermediate and to monitor the reaction. The oxygen functionalities on the catalyst surface activate nitrate ions to form various intermediates (NO2, NO, NH2OH, and NH2) and reduce the rate determining step energy barrier (*NO3 -> *NO2). This study presents a novel approach for the use of magnetic biochar as an electro-catalyst in NO3RR and opens the road for solving environmental and energy challenges.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：江苏省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台