二维NiFe-N<sub><em>x</em></sub>-C催化剂的制备及电催化二氧化碳还原性能研究

摘要为降低碳基催化剂Ni-N位点上CO₂的活化能垒,并解决Fe-N位点上的CO中毒问题,以NaCl为模板,采用限制溶剂生长和热解法合成了具有NiFe-N_x双活性位点的超薄二维碳基催化剂(ZNF-900)。结果显示:ZNF-900具有超高的电催化CO₂还原生成CO的选择性(FE_CO＞97%)和电流密度(j_CO=37.3 mA·cm^-2)。通过XPS、Raman等表征和EIS、Tafel斜率等电化学分析方法,证明Ni和Fe之间存在协同促进作用,从而促进了催化剂表面CO₂分子的吸附和CO产物的脱附。

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	李京
	李阳
	范晓彬
	张凤宝
	张国亮
	夏清
	彭文朝

关键词：二维碳基催化剂协同催化 CO₂还原电催化

Abstract： In order to reduce the energy barrier of CO₂ activation at Ni-N sites and solve the problem of CO poisoning at Fe-N sites, an ultra-thin two-dimensional carbon-based catalyst (ZNF-900) with NiFe-N_x active sites was synthesized by limited solvent growth and pyrolysis methods. The ZNF-900 has ultra-high selectivity (FE_CO>97%) and CO partial current density (j_CO=37.3 mA·cm^-2) for electrocatalytic CO₂ reduction to CO. By XPS, Raman, EIS, Tafel slope and other analytic methods, it is proved that there is a synergistic promoting effect between Ni and Fe, which promotes the adsorption of CO₂ molecules and the desorption of CO products on the surface of catalysts.

Keywords： two-dimensional carbon-based catalyst synergistic catalysis CO₂ reduction electrocatalysis

Received 2022-05-19;

Fund:国家自然科学基金(U20A20153);天津市科技支撑计划重点项目(20YFZCSN00610);河北省社会科学基金(HB16SH010);物质绿色创造与制造海河实验室资助(CYZC202107)。

Corresponding Authors: 彭文朝,副教授,E-mail:wenchao.peng@tju.edu.cn。 Email: wenchao.peng@tju.edu.cn

About author: 李京(1996-),男,硕士研究生,现从事电催化二氧化碳还原方面的研究。

引用本文:

李京, 李阳, 范晓彬, 张凤宝, 张国亮, 夏清, 彭文朝.二维NiFe-N_x-C催化剂的制备及电催化二氧化碳还原性能研究[J]. 化学工业与工程, 2024,41(2): 12-23

LI Jing, LI Yang, FAN Xiaobin, ZHANG Fengbao, ZHANG Guoliang, XIA Qing, PENG Wenchao.Synthesis of 2D NiFe-N_x-C materials for electrocatalytic CO₂ reduction[J]. Chemcial Industry and Engineering, 2024,41(2): 12-23

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