铜
法拉第效率
电催化剂
纳米颗粒
选择性
电化学
密度泛函理论
电解质
材料科学
催化作用
纳米技术
石墨烯
产量(工程)
无机化学
化学工程
化学
电极
冶金
有机化学
计算化学
工程类
物理化学
作者
Yuying Zhao,Qixin Yuan,Ruting Xu,Chenhao Zhang,Kang Sun,Ao Wang,Anqi Zhang,Ziyun Wang,Jianchun Jiang,Mengmeng Fan
标识
DOI:10.1016/j.apcatb.2024.124168
摘要
Developing efficient electrocatalysts for CO2 reduction has gained significant attention in the field of sustainable energy, especially the Cu-based catalysts for CO2 conversion to valuable alcohols. In this study, we developed Cu nanoparticles supported on pyridinic N-B doped graphene nanoribbons/amorphous carbon (Cu/BNC-1) as an electrocatalyst for CO2 reduction, exhibiting substantially improved ethanol (EtOH) conversion rate in terms of activity, selectivity, and stability. The Cu/BNC-1 achieved a remarkable 58.64% Faradaic efficiency (FE) for producing EtOH at -1.0 V vs. RHE with a current density of 20.4 mA cm-2 in 0.5 M KHCO3 electrolyte. In-situ Raman, FT-IR, and density functional theory (DFT) calculations demonstrated that the high C2+ product selectivity of Cu/BNC-1 attributed to the pyridinic N-B modulation, lowering the CO dimerization barrier. Moreover, the synergistic confinement effect of Cu and BNC can stabilize the C-O bond of the ⁎HOCCH intermediate, thereby increasing the yield of EtOH.
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