In-situ grown CuO_(x)nanowire forest on copper foam:A 3D hierarchical and freestanding electrocatalyst with enhanced carbonaceous product selectivity in CO_(2)reduction  

作　　者：Wenjun Zhang Minghang Jiang Songyuan Yang Yi Hu Bin Mu Zuoxiu Tie Zhong Jin 

机构地区：[1]MOE Key Laboratory of Mesoscopic Chemistry,MOE Key Laboratory of High Performance Polymer Materials and Technology,Jiangsu Key Laboratory of Advanced Organic Materials,School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210023,China [2]Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,International Innovation Center for Forest Chemicals and Materials,College of Chemical Engineering,Nanjing Forestry University,Nanjing 210037,China [3]Nanjing Tieming Energy Technology Co.Ltd.,Nanjing 210093,China [4]Suzhou Tierui New Energy Technology Co.Ltd.,Suzhou 215228,China [5]School for Engineering of Matter,Transport,and Energy,Arizona State University,501 East Tyler Mall,Tempe,AZ 85287,USA

出　　处：《Nano Research Energy》2022年第3期44-51,共8页纳米能源研究（英文）

基　　金：grateful to the supports from the National Key R&D Program of China(No.2017YFA0208200);the National Natural Science Foundation of China(Nos.22022505,21872069);the Fundamental Research Funds for the Central Universities(Nos.020514380266,020514380272,020514380274);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.202201007,2022SX00000955);the Suzhou Gusu Leading Talent Program of Science and Technology Innovation and Entrepreneurship in Wujiang District(No.ZXL2021273).

摘　　要：Electrocatalytic carbon dioxide(CO_(2))reduction is considered as an economical and environmentally friendly approach to neutralizing and recycling greenhouse gas CO_(2).However,the design of preeminent and robust electrocatalysts for CO_(2)electroreduction is still challenging.Herein,we report the in-situ growth of dense CuO_(x)nanowire forest on 3D porous Cu foam(CuO_(x)-NWF@Cu-F),which can be directly applied as a freestanding and binder-free working electrode for highly effective electrocatalytic CO_(2)reduction.By adjusting the surface morphology and chemical composition of CuO_(x)nanowires via surface reconstruction,large electrochemically active surface area and abundant Cu(+1)sites were generated,leading to remarkable activity for CO_(2)electroreduction.The as-prepared hierarchical conductive electrode exhibited an enhanced Faradaic efficiency of 15.0%for ethanol formation(FE_(C_(2)H_(5)OH))and a total Faradaic efficiency of 69.4%for all carbonaceous compounds(FE_(C-total))at a mild applied potential of–0.45 V vs.RHE in 0.1 M KHCO_(3)electrolyte.It achieved a 4-fold increase in FE_(C-total)than that of Cu nanowire forest supported on 3D porous Cu foam(Cu-NWF@Cu-F)obtained by in-situ reduction of the CuO_(x)-NWF@Cu-F via annealing at H_(2)atmosphere,and thereby effectively suppressed the hydrogen evolution side-reaction.

关 键 词：electrocatalytic CO_(2)reduction CuO_(x)nanowire forest 3D hierarchical nanostructure surface reconstruction enhanced carbonaceous product selectivity 

分 类 号：O643.36[理学—物理化学] TB383[理学—化学]