In situ revealing C-C coupling behavior for CO_(2)electroreduction on tensile strain Ptδ+-Cuδ+dual sites  

作　　者：Feng-Ya Ma Pu Huang Jing Zhou Hong-Wei Zeng Jia-Wei Zhang Hui Zhao Yu-Ming Dong Yong-Fa Zhu Yao Wang 

机构地区：[1]School of Chemical and Material Engineering,International Joint Research Center for Photoresponsive Molecules and Materials,Jiangnan University,Wuxi,214122,China [2]International Joint Research Center for Photoresponsive Molecules and Materials,Jiangnan University,Wuxi,214122,China [3]Department of Chemistry,Tsinghua University,Beijing,100084,China

出　　处：《Rare Metals》2024年第12期6436-6446,共11页稀有金属(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(No.22305101);the Natural Science Foundation of Jiangsu Province(No.BK20231032);the Special Fund Project of Jiangsu Province for Scientific and Technological Innovation in Carbon Peaking and Carbon Neutrality(No.BK20220023);the Fundamental Research Funds for the Central Universities(No.JUSRP123020);the Startup Funding at Jiangnan University(No.1045219032220100)。

摘　　要：Engineering the desired dual metal sites to realize C-C coupling of CO_(2)is of great importance for the practical applications of CO_(2)electroreduction reaction(CER).Herein,an efficient strategy for constructing heterogeneous Pt^(δ+)-Cu^(δ+)dual sites to strengthen the generation and coupling of*CO and*CHO(or*COH)during CER process is presented in this work.The radiilarger Pt not only stabilizes the Cu^(δ+)ut also induces a tensile strain in Pt^(δ+)-Cu^(δ+)dual sites.The obtained Pt^(δ+)-Cu^(δ+)dual sites achieve a total Faradaic efficiency and current density of C2products with 70.9%and586.9 mA·cm-2at-1.20 V(vs.RHE),which is higher than that of Cu^(δ+)single site(55.4%,286.9 mA·cm^(-2)).The in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy(ATR-SEIRAS)reveals that the Pt^(δ+)-Cu^(δ+)dual sites can promote the generation of C1intermediates(such as*CO,*COOH,*COH,and*CHO)and C-C coupling.Additional in situ surface-enhanced Raman spectra demonstrate that Pt^(δ+)Cu^(δ+)dual sites can induce the generation of the high-frequency peak for*CO_(atop),thus accelerating the C-C coupling.This work provides a promising avenue for stabilizing and enhancing the performance of Cu^(δ+)sites toward CER.

关 键 词：Pt^(δ+)-Cu^(δ+)dual sites Tensile strain CO_(2)electroreduction C-C coupling In situ ATR-SEIRAS In situ Raman 

分 类 号：X701[环境科学与工程—环境工程] O643.36[理学—物理化学]