Rapid and controllable in-situ self-assembly of main-group metal nanofilms for highly efficient CO_(2)electroreduction to liquid fuel in flow cells  

作　　者：Miao Wang Huaizhu Wang Yaoda Wang Junchuan Liang Mengfei Zhu Jiarui Li Zuoxiu Tie Zhong Jin 

机构地区：[1]State Key Laboratory of Coordination Chemistry,MOE Key Laboratory of Mesoscopic Chemistry,MOE Key Laboratory of High Performance Polymer Materials and Technology,Jiangsu Key Laboratory of Advanced Organic Materials,Tianchang New Materials and Energy Technology Researc

出　　处：《Nano Research》2024年第6期5718-5725,共8页纳米研究（英文版）

基　　金：the National Key Research and Development Program of China(No.2017YFA0208200);the National Natural Science Foundation of China(Nos.22022505 and 21872069);the Fundamental Research Funds for the Central Universities of China(Nos.020514380266,020514380272,and 020514380274);the General Project of the Joint Fund of Equipment Pre-research and the Ministry of Education(No.8091B02052407);the Scientific and Technological Achievements Transformation Special Fund of Jiangsu Province(No.BA2023037);the Scientific and Technological Innovation Special Fund for Carbon Peak and Carbon Neutrality of Jiangsu Province(No.BK20220008);the Nanjing International Collaboration Research Program(Nos.202201007 and 2022SX00000955);the Suzhou Gusu Leading Talent Program of Science and Technology Innovation and Entrepreneurship in Wujiang District(No.ZXL2021273).

摘　　要：The electrocatalytic reduction of CO_(2)is a promising pathway to generate renewable fuels and chemicals.However,its advancement is impeded by the absence of electrocatalysts with both high selectivity and stability.Here,we present a scalable in-situ thermal evaporation technique for synthesizing series of Bi,In,and Sn nanofilms on carbon felt(CF)substrates with a high-aspect-ratio structure.The resulting main-group metal nanofilms exhibit a homogeneously distributed and highly exposed catalyst surface with ample active sites,thereby promoting mass transport and ad-/desorption of reaction intermediates.Benefiting from the unique fractal morphology,the Bi nanofilms deposited on CF exhibit optimal catalytic activities for CO_(2)electroreduction among the designed metal nanofilms electrodes,with the highest Faradaic efficiency of 96.9%for formate production at−1.3 V vs.reversible hydrogen electrode(RHE)in H-cell.Under an industrially relevant current density of 221.4 mA·cm−2 in flow cells,the Bi nanofilms retain a high Faradaic efficiency of 81.7%at−1.1 V(vs.RHE)and a good long-term stability for formate production.Furthermore,a techno-economic analysis(TEA)model shows the potential commercial viability of electrocatalytic CO_(2)conversion into formate using the Bi nanofilms catalyst.Our results offer a green and convenient approach for in-situ fabrication of stable and inexpensive thin-film catalysts with a fractal structure applicable to various industrial settings.

关 键 词：CO_(2)electroreduction non-noble metal nanofilms flow cells efficiency and selectivity techno-economic analysis 

分 类 号：O64[理学—物理化学]