催化作用
水煤气变换反应
纳米颗粒
兴奋剂
材料科学
化学工程
无机化学
纳米技术
化学
有机化学
光电子学
工程类
作者
Ergys Pahija,Christopher Panaritis,Brian A. Rutherford,Martin Couillard,Bussaraporn Patarachao,Jalil Shadbahr,Farid Bensebaa,Gregory S. Patience,Daria C. Boffito
标识
DOI:10.1016/j.jcou.2022.102155
摘要
Coal-based electricity generation surged 22% in 2021 versus 2019 in the USA due to high natural gas prices and ease of transportation. This contradicts societies desire to produce clean energy and underscores the urgency to develop technologies to capture atmospheric CO 2 and produce value-added products. The reverse water gas shift (RWGS) converts CO 2 to CO, which is a basic intermediate for the chemical and petrochemical industries. Fe is the prime catalyst metal for this reaction and here we compare the activity of Fe clusters and 5 nm FeO x nanoparticles deposited on Cu/Al 2 O 3 . The catalytic activity towards the RWGS increases as a function of Fe doping. Fe clusters doping are non-uniform in size on Cu/Al 2 O 3 , whereas FeO x nanoparticles synthesized with the polyol method are uniform and well-dispersed on the Cu surface. The interaction between Cu and FeO x establishes a dual catalyst where FeO x and Cu activate CO 2 and H 2 , respectively, an effect that is functionally equivalent to the metal-support interaction phenomenon. Furthermore, FeO x on Cu/Al 2 O 3 (0.009 g g −1 of Fe) converts 2-times more CO 2 than un-doped Cu/Al 2 O 3 with a CO selectivity > 99%. Our method provides a technique to dope synthesized catalysts with nanoparticles to enhance their catalytic activity, selectivity and stability. • Unprecedented CO 2 conversion in the Reverse Water Gas Shift at 300 °C: 5%. • Eight CuFe catalysts supported on Al 2 O 3 were synthesized. • CuFe/Al 2 O 3 was 99%+ selective to CO. • FeO x nanoparticle doping increased the CO 2 conversion by 50%. • We demonstrate the synergistic effect for the dual catalyst FeO x and Cu.
科研通智能强力驱动
Strongly Powered by AbleSci AI