Cu2O-Cu界面上的Cu+和Cu0协同促进电催化CO2还原高效和高选择性地生成C2+产物(英文)

被引：4
|
作者：
王胜楠 [1 ,2 ]
王丹 [1 ]
田本强 [2 ]
高响响 [2 ]
韩璐 [2 ]
钟洋 [3 ]
宋舒畅 [2 ]
王智立 [2 ]
李亚平 [2 ]
归家宁 [1 ]
Marshet G.Sendeku [4 ]
张颖 [1 ]
邝允 [2 ]
孙晓明 [2 ]
机构：
[1] Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,Jiangnan University
[2] State Key Laboratory of Chemical Resource Engineering,Beijing Advanced Innovation Center for Soft Matter Science and Engineering,College of Chemistry,Beijing University of Chemical Technology
[3] Weichai Power Co.,Ltd.
[4] Ocean Hydrogen Energy R&D Center,Research Institute of Tsinghua University in Shenzhen
来源：
Science China Materials | 2023年 / 05期
基金：
中央高校基本科研业务费专项资金资助;
关键词：
D O I：
暂无
中图分类号：
TQ426 [催化剂（触媒）]; X701 [废气的处理与利用];
学科分类号：
080502 ; 081705 ; 083002 ;
摘要：
电催化CO2还原技术有望同时缓解化石燃料濒临枯竭及大气中CO2浓度不断攀升等问题.然而,对于高附加值的电催化CO2还原多碳产物的选择性提升,仍然面临巨大挑战.密度泛函理论(DFT)计算表明,Cu2O-Cu界面上Cu+和Cu0的协同耦合效应使其表面上*COCO中间体的生成能降低,同时H2O的解离自由能也降低,从而有利于电催化CO2还原高选择性生成多碳产物特别是C2H4.受DFT计算结果的启发,本文设计了一种氧化物衍生铜电极的活化策略,构建Cu2O-Cu界面,以Cu+和Cu0协同促进电催化CO2还原高效高选择性生成C2+产物.其中,Cu2O立方体被用作初始催化剂,经方波电位处理后,在Cu2O-Cu界面上形成了具有Cu+和Cu0协同作用的S W-Cu2O/Cu立方体.在H型电解池中,SW-Cu20/Cu电催化CO2还原生成C2H4和C2+产物的法拉第效率分别为60%和75%,约为前驱体Cu2O立方体的1.5倍,证明CuG和Cu+在Cu2O-Cu界面上的协同作用的确可提高电催化CO2还原过程中特定高附加值多碳产物的选择性.
引用
收藏
页码：1801 / 1809
页数：9
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