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    題名: Revealing the Active Phase of Copper during the Electroreduction of CO2 in Aqueous Electrolyte by Correlating In Situ X‑ray Spectroscopy and In Situ Electron Microscopy
    作者: Juan-Jesus, Velasco-Velez;Mom, Rik V.;Luis-Ernesto, Sandoval-Diaz;Falling, Lorenz J.;Chuang, Cheng-Hao;Gao, Dunfeng;Jones, Travis E.;Zhu, Qingjun;Arrigo, Rosa;Cuenya, Beatriz Roldan;Axel, Knop-Gericke;Lunkenbein, Thomas;Schlögl, Robert
    日期: 2020-05-27
    上傳時間: 2020-07-27 12:10:23 (UTC+8)
    出版者: American Chemical Society
    摘要: The variation in the morphology and electronic structure of copper during the electroreduction of CO2 into valuable hydrocarbons and alcohols was revealed by combining in situ surface- and bulk-sensitive X-ray spectroscopies with electrochemical scanning electron microscopy. These experiments proved that the electrified interface surface and near-surface are dominated by reduced copper. The selectivity to the formation of the key C–C bond is enhanced at higher cathodic potentials as a consequence of increased copper metallicity. In addition, the reduction of the copper oxide electrode and oxygen loss in the lattice reconstructs the electrode to yield a rougher surface with more uncoordinated sites, which controls the dissociation barrier of water and CO2. Thus, according to these results, copper oxide species can only be stabilized kinetically under CO2 reduction reaction conditions.
    關聯: ACS Energy Letters 5, p.2106–2111
    DOI: 10.1021/acsenergylett.0c00802
    顯示於類別:[物理學系暨研究所] 期刊論文

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