甲醇
催化作用
选择性
吸附
三元运算
离解(化学)
金属
化学
氢
无机化学
制氢
产量(工程)
材料科学
物理化学
有机化学
冶金
计算机科学
程序设计语言
作者
Abdullah J. Al Abdulghani,Edgar E. Turizo-Pinilla,Maria J. Fabregas-Angulo,Ryan Hagmann,Faysal Ibrahim,Jacob H. Jansen,Theodore O. Agbi,Samiha Bhat,Miguel Sepúlveda-Pagán,Morgan O. Kraimer,Collin M. Queen,Zhuoran Sun,Eranda Nikolla,Yomaira J. Pagán‐Torres,Ive Hermans
标识
DOI:10.1016/j.apcatb.2024.124198
摘要
Hydrogenating CO2 to methanol with high yields and selectivity remains a kinetic challenge. We report ternary Cu-Ga-Zr catalysts with promising performances. Methanol productivity and selectivity were highest on coprecipitated samples containing approximately 20 wt% of each metal. At 7% isoconversion, this ternary system was more selective to methanol (60 ± 1%) than CuZrOx (51 ± 1%) and CuGaOx (53 ± 3%) at the same Cu loading. We uncover the importance of the Cu/Zr interface for CO2 adsorption, Cu/Ga interface for H adsorption, and metallic Cu for H–H dissociation. Methanol formation on these catalysts was found to be first order in H2, implying the reaction was likely to be rate-limited by hydrogen activation. In fact, the methanol space-time yield correlated linearly with the H2/D2 exchange rate. We propose a catalytic pathway wherein the production of the byproduct CO is hindered by the presence of adsorbed H.
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