电化学改性Ag纳米颗粒用于CO_(2)电催化还原  

Electrochemically Modified Ag Nanoparticles for CO_(2)Electrocatalytic Reduction

作　　者：贺凡 伍人先 程子业 杨艳 李佳欣 张威 俞峰苹 祁志福 He Fan;Wu Renxian;Cheng Ziye;Yang Yan;Li Jiaxin;Zhang Wei;Yu Fengping;Qi Zhifu(Zhejiang Baima Lake Laboratory Co.,Ltd,Hangzhou,310051;Zhejiang Zheneng Technology Environmental Protection Group Co.,Ltd,Hangzhou,310012)

机构地区：[1]浙江省白马湖实验室有限公司,杭州310051 [2]浙江浙能科技环保集团股份有限公司,杭州310012

出　　处：《化学通报(中英文)》2025年第2期219-226,共8页Chemistry

基　　金：浙江省重点研发计划项目(2022C03040);浙江省能源集团有限公司项目(ZNKJ-2021-111);浙江浙能科技环保集团股份有限公司项目(TD-KJ-21-008)资助。

摘　　要：发展CO_(2)电催化还原技术有利于加速净零碳排放社会的构建,在减少CO_(2)排放对环境影响的同时,结合可再生能源将电能转化为化学能,可以减少弃风弃电现象的发生。CO_(2)电催化反应性能依赖于催化剂、反应器及电解工艺的开发和优化,其中,一些具有进一步放大潜力的材料和结构将推动CO_(2)电催化技术从实验室层面走向工业化应用阶段。在催化剂方面,人们已经探索和合成了大量用于还原CO_(2)制CO的材料。其中,Ag具有催化性能高、价格低廉且化学稳定性好等优势,是短期内最有希望用于CO_(2)规模化制备CO的电催化剂。本工作采用商业Ag纳米颗粒作为原材料,开发了一种简便的电化学改性方法,经电化学氧化-还原后,Ag纳米颗粒的催化性能显著提高,在H型电解池内,当电位为-0.88V(vs.RHE)时,CO的法拉第效率提升至97%;随后,将改性后的Ag纳米颗粒应用于零间隙膜电极反应器(zero-gap MEA)内,CO_(2)电催化制CO的选择性和电解电压在大电流密度(≥100mA·cm^(-2))均得到了提升。The development of CO_(2)electrocatalytic reduction technology is conducive to accelerating the construction of a net-zero carbon emission society.While reducing the impact of CO_(2)emissions on the environment,it can combine renewable energy to convert electricity into chemical energy,reducing wind and electricity abandonment.The performance of CO_(2)electrocatalytic reactions depends on developing and optimizing catalysts,reactors,and electrolysis processes.Among them,some materials and structures with further amplification potential will promote CO_(2)electrocatalytic technology from the laboratory level to the industrial application stage.In terms of catalysts,people have explored and synthesized a large number of materials for reducing CO_(2)to produce CO.Among them,Ag has the advantages of high catalytic performance,low price,and good chemical stability.It is the most promising electrocatalyst for large-scale production of CO from CO_(2)in the short term.In this work,we used commercial Ag nanoparticles as raw materials and developed a simple electrochemical modification method.After electrochemical oxidation-reduction,the catalytic performance of Ag nanoparticles was significantly improved.In an H-type electrolytic cell,When the potential is set at-0.88 V vs.RHE,the Faraday efficiency of CO increases to 97%.Subsequently,we apply the modified Ag nanoparticles to the zero-gap membrane electrode reactor(zero-gap MEA)for CO_(2)electrocatalysis.The selectivity and electrolysis voltage of CO production have been improved at large current densities(≥100 mA·cm^(-2)).

关 键 词：CO_(2) 电催化 银基电极 膜电极电解池 电化学改性 

分 类 号：O646[理学—物理化学]