Interstitial carbon induces enriched Cu^(δ+) sites in Cu_(2)O nanoparticles to facilitate CO_(2) electroreduction to C_(2+) products

作     者：Haoran Wang Rongbo Sun Peigen Liu Haohui Hu Chen Ling Xiao Han Yi Shi Xusheng Zheng Geng Wu Xun Hong 

作者机构：Center of Advanced Nanocatalysis(CAN)Department of Applied ChemistryHefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Sinochem Holdings Co LtdXiongan New AreaHebei 071700China National Synchrotron Radiation Laboratory(NSRL)University of Science and Technology of ChinaHefei 230029China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2024年第17卷第8期

页      面：7013-7019页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Key R&D Program of China(No.2018YFA0702001) the National Natural Science Foundation of China(Nos.22371268 and 22301287) Fundamental Research Funds for the Central Universities(No.WK2060000016) Anhui Provincial Natural Science Foundation(Nos.2208085J09 and 2208085QB33) Collaborative Innovation Program of Hefei Science Center,CAS(No.2022HSC-CIP020) Youth Innovation Promotion Association of the Chinese Academy of Science(No.2018494) USTC Tang Scholar 

主　　题：CO_(2) electroreduction C-C coupling interstitial carbon *CO coverage industrial-level current density 

摘      要：The electrochemical CO_(2) reduction reaction(CO_(2)RR)holds significant promise in advancing carbon *** catalysts for the electrochemical CO_(2)RR to multi-carbon(C_(2+))products(e.g.,C_(2)H_(4))under industrial-level current density is urgently needed and ***,we report the Cu_(2)O nanoparticles doped with interstitial carbon atoms(denoted as C-Cu_(2)O NPs)for the conversion of CO_(2) to C_(2+)*** interstitial carbon promotes the C-Cu_(2)O NPs to possess abundant unsaturated Cu–O bonds,leading to a high-density Cu^(δ+)(0δ1)*** obtained C-Cu_(2)O NPs exhibited significant Faradic efficiency(FE)of C_(2+) products approaching 76.9%and a partial current density reaching 615.2 mA·cm^(–2)under an industrial-level current density of 800 mA·cm^(–2).Furthermore,the efficient electrosynthesis of C_(2)H_(4) achieved an FE of 57.4%with a partial current density of 459.2 mA·cm^(–2).In situ electrochemical attenuated total reflection Fourier transform infrared spectroscopy and in situ Raman spectroscopy analyses revealed that C-Cu_(2)O NPs stabilized the intermediate*CO and facilitated C–C coupling,leading to increased selectivity towards C_(2+) products.