光化学法制备过渡金属-氮共掺杂多孔炭基CO2电还原催化剂

doi:10.19964/j.issn.1006-4990.2021-0231

无机盐工业 ›› 2021, Vol. 53 ›› Issue (6): 8-13.doi: 10.19964/j.issn.1006-4990.2021-0231

• 无机新型材料——能源存储与转换 • 上一篇下一篇

光化学法制备过渡金属-氮共掺杂多孔炭基CO₂电还原催化剂

胡旭(),董灵玉,李文翠,郝广平()

大连理工大学化工学院,精细化工国家重点实验室,辽宁省低碳资源高值化利用重点实验室,辽宁大连 116024

收稿日期:2021-04-19 出版日期:2021-06-10 发布日期:2021-07-08
作者简介:胡旭（1995— ）,女,博士研究生,研究方向为电催化二氧化碳还原;E-mail： huxu@mail.dlut.edu.cn。
基金资助:
国家自然科学基金项目(21975037);辽宁省兴辽英才计划项目资助(XLYC1807205);中央高校基本科研业务费资助[DUT18RC（3）075]

Preparation of transition metal-nitrogen co-doped porous carbon-based CO₂electro-reduction catalyst through photochemical method

Hu Xu(),Dong Lingyu,Li Wencui,Hao Guangping()

State Key Laboratory of Fine Chemicals,Liaoning Key Laboratory for Catalytic Conversion Carbon Resources,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China

Received:2021-04-19 Published:2021-06-10 Online:2021-07-08

摘要/Abstract

摘要：

过渡金属-氮共掺杂炭材料是一类高效的CO₂电还原催化剂。以热解聚合物制备的氮掺杂炭材料为载体,浸渍镍源,经红外灯光照2 h,利用光化学法制备了高分散的镍-氮-碳催化剂（Ni/NC）。采用扫描电镜（SEM）、物理吸附、粉末X射线衍射（XRD）、X射线光电子能谱（XPS）等手段对催化剂的形貌、结构、物相和组成进行了分析,并评价了催化剂的CO₂电还原反应性能。电化学性能测试结果表明,在0.5 mol/L的KHCO₃电解液中,镍的负载量为2 %（质量分数）时催化性能最好,CO分电流密度得到有效提升,塔菲尔斜率为492 mV/dec,起始过电位为286 mV;在-0.6 V（vs.RHE）下,CO的法拉第效率为78%,在-1.0 ~-0.5 V（vs.RHE）内,n（CO）/n（H₂）=0.5~3.6。

关键词: 光化学法, 镍-氮共掺杂炭, 多孔炭, CO₂电还原, 电催化剂, 碳中和

Abstract:

Transition metal-nitrogen co-doped carbon materials are a kind of high efficiency electrocatalysts for CO₂ reduction. The nitrogen-doped carbon material prepared by pyrolysis polymer was used as the support,and the nickel precursor was synthesized by an impregnation method.The highly dispersed Ni-N-C type catalysts（Ni/NC） were obtained through the photochemical method with the assistant of infrared lamp for 2 h.The morphology,structure,phase and composition of catalysts were characterized by scanning electron microscopy（SEM）,gas physisorption,X-ray diffraction（XRD） and X-ray photoelectron spectroscopy（XPS）.The electrocatalytic activity on CO₂ reduction reaction was analyzed.The electrochemical performance test results showed that with the electrolyte（KHCO ₃） of 0.5 mol/L,the sample with Ni loading of 2% delivered the best catalytic performance and CO partial current density was significanted improved.,the Tafel slope was 492 mV/dec,and the initial overpotential was 286 mV.At -0.6 V（vs.RHE）,the Faradaic efficiency of CO was 78%.The ratio of 0.5~3.6 for n（CO）/n（H₂） was achieved in the range of -1.0~ -0.5 V（vs.RHE）.

Key words: photochemical method, nickel-nitrogen co-doped carbon, porous carbon, CO₂ electroreduction, electrocatalysts, carbon neutralization

中图分类号:

TQ138.13

胡旭,董灵玉,李文翠,郝广平. 光化学法制备过渡金属-氮共掺杂多孔炭基CO₂电还原催化剂[J]. 无机盐工业, 2021, 53(6): 8-13.

Hu Xu,Dong Lingyu,Li Wencui,Hao Guangping. Preparation of transition metal-nitrogen co-doped porous carbon-based CO₂electro-reduction catalyst through photochemical method[J]. Inorganic Chemicals Industry, 2021, 53(6): 8-13.

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样品	比表面积/（m²·g^-1）	孔容/（cm³·g^-1）
NC-700	686	0.49
NC-900	658	0.43
Ni/NC-2	640	0.35

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光化学法制备过渡金属-氮共掺杂多孔炭基CO₂电还原催化剂

Preparation of transition metal-nitrogen co-doped porous carbon-based CO₂electro-reduction catalyst through photochemical method

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