Transition metal (Fe, Co, Ni)-doped cuprous oxide nanowire arrays as self-supporting catalysts for electrocatalytic CO2 reduction reaction to ethylene - Details

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Abstract：

The　transition　metal　(Fe,　Co,　Ni)-doped　cuprous　oxide　(Cu2O)　nanowire　arrays　on　Cu　mesh　(CM)　(M-Cu2O@CM,　M　=　Fe,　Co,　Ni)　are　successfully　synthesized　for　the　electrocatalytic　CO2　reduction　reaction　(CO2RR)　to　ethylene　(C2H4)　through　the　simple　calcination　and　impregnation-exchange　methods.　Systematic　characterizations　have　demonstrated　that　the　Ni/Co　doping　in　Cu2O@CM　is　conducive　to　stabilizing　the　Cu+　sites　due　to　the　electron　transfer　from　Cu2O　to　Ni/Co,　while　the　Fe　doping　has　the　opposite　effect.　Consequently,　they　show　the　different　electrocatalytic　performances　of　Ni-Cu2O@CM　＞　Co-Cu2O@CM　＞　Cu2O@CM　＞　Fe-Cu2O@CM　for　CO2RR　to　C2H4　in　an　H-cell.　Among　them,　Ni-Cu2O@CM　exhibits　the　∼2.0-fold　faradaic　efficiency　for　C2H4　(58.2　%　vs.　28.7　%)　and　the　∼2.5-fold　current　density　(−37.6　vs.　−15.0　mA·cm−2)　at　−1.1　V　vs.　RHE,　as　compared　with　Cu2O@CM.　Further　experiments　reveal　that　during　the　electrocatalytic　CO2RR,　the　Ni-Cu2O@CM　can　generate　more　*CO,　which　promotes　the　C–C　coupling　reaction.　The　activity　of　Co-Cu2O@CM　is　lower　than　Ni-Cu2O@CM　because　of　the　strong　adsorption　of　*COOH,　while　the　Fe-Cu2O@CM　even　exhibits　a　lower　activity　than　Cu2O@CM.　This　work　provides　an　insight　into　the　effect　of　transition　metal-doped　Cu2O　array　on　the　electrocatalytic　CO2RR　to　C2H4　products.　©　2024　Elsevier　B.V.

Keyword：

Array CO2 reduction Cuprous oxide Ethylene Transition metal

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[ 1 ] [Min S.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 2 ] [Min S.]Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 3 ] [Min S.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 4 ] [Min S.]University Chinese Academy of Science, Fujian College, Fuzhou, 350002, China
[ 5 ] [Wang Z.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 6 ] [Wang Z.]Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 7 ] [Wang Z.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 8 ] [Wang Z.]University Chinese Academy of Science, Fujian College, Fuzhou, 350002, China
[ 9 ] [Xu X.]Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 10 ] [Xu X.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 11 ] [Xu X.]University Chinese Academy of Science, Fujian College, Fuzhou, 350002, China
[ 12 ] [He J.]College of Chemistry, Fuzhou University, Fuzhou, 350116, China
[ 13 ] [He J.]Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 14 ] [He J.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 15 ] [He J.]University Chinese Academy of Science, Fujian College, Fuzhou, 350002, China
[ 16 ] [Sun M.]Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 17 ] [Sun M.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 18 ] [Sun M.]University Chinese Academy of Science, Fujian College, Fuzhou, 350002, China
[ 19 ] [Lin W.]Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 20 ] [Lin W.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 21 ] [Lin W.]University Chinese Academy of Science, Fujian College, Fuzhou, 350002, China
[ 22 ] [Kang L.]Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 23 ] [Kang L.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 24 ] [Kang L.]University Chinese Academy of Science, Fujian College, Fuzhou, 350002, China

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