化学
催化作用
甲醇
惰性气体
惰性
纳米颗粒
选择性
氧化物
金属
吸附
贵金属
无机化学
化学工程
有机化学
工程类
作者
Xiaofang Yang,Shyam Kattel,Sanjaya D. Senanayake,J. Anibal Boscoboinik,Xiaowa Nie,Jesús Graciani,José A. Rodriguez,Ping Liu,Dario Stacchiola,Jingguang G. Chen
摘要
Capture and recycling of CO2 into valuable chemicals such as alcohols could help mitigate its emissions into the atmosphere. Due to its inert nature, the activation of CO2 is a critical step in improving the overall reaction kinetics during its chemical conversion. Although pure gold is an inert noble metal and cannot catalyze hydrogenation reactions, it can be activated when deposited as nanoparticles on the appropriate oxide support. In this combined experimental and theoretical study, it is shown that an electronic polarization at the metal–oxide interface of Au nanoparticles anchored and stabilized on a CeOx/TiO2 substrate generates active centers for CO2 adsorption and its low pressure hydrogenation, leading to a higher selectivity toward methanol. This study illustrates the importance of localized electronic properties and structure in catalysis for achieving higher alcohol selectivity from CO2 hydrogenation.
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