Article
Chemistry, Physical
Alexander Bagger, Oliver Christensen, Vladislav Ivanistsev, Jan Rossmeisl
Summary: This work investigates the theoretical differences and similarities of CO2/CO catalytic reduction reactions in gas, aqueous solution, and aprotic solution. The binding energy serves as a good descriptor for the gaseous and aqueous phases and allows catalysts to be categorized by reduction products. However, descriptors alone are insufficient for mapping in the aprotic phase, requiring the use of a microkinetic model.
Article
Chemistry, Physical
Renjie Liu, Denis Leshchev, Eli Stavitski, Mitchell Juneau, Jane N. Agwara, Marc D. Porosoff
Summary: Research on utilizing CO2 as a C-1 feedstock for the synthesis of chemicals and fuels shows that the selectivity of catalysts is strongly linked to the Si/Al ratio and the method of introducing the K promoter.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Iris C. ten Have, Robin Y. van den Brink, Stephane C. Marie-Rose, Florian Meirer, Bert M. Weckhuysen
Summary: Gasification is a process that converts solid waste into gaseous feedstock. This study investigates the possibility of using waste gasification solid residue as a catalyst for producing light olefins. Experimental results show that the catalyst can convert biomass-derived syngas into methane and olefins.
Article
Chemistry, Physical
Jiaqi Zhao, Zhenhua Li, Pu Wang, Peng Miao, Run Shi, Geoffrey I. N. Waterhouse, Tierui Zhang
Summary: A novel photo-driven Fischer-Tropsch to olefins (FTO) catalyst was synthesized by physically mixing a layered-double-hydroxide-derived cobalt catalyst (LD-Co) with a hydrophobic polydivinylbenzene (PDVB). The obtained LD-Co/PDVB catalyst exhibited outstanding photothermal FTO performance by synergistically harnessing the photothermal and catalytic properties of LD-Co with the hydrophobic properties of PDVB.
Article
Chemistry, Physical
Shupeng Guo, Congcong Niu, Zhongyi Ma, Jungang Wang, Bo Hou, Litao Jia, Debao Li
Summary: Introducing Ba and CN species into Co/Al2O3 catalyst can enhance the electron density on the cobalt surface, which improves the C-5(+) selectivity and C-3 o/p ratio, leading to enhanced catalytic performance in Fischer-Tropsch synthesis reaction.
Article
Chemistry, Physical
Sun-Mi Hwang, Seung Ju Han, Hae-Gu Park, Hojeong Lee, Kwangjin An, Ki-Won Jun, Seok Ki Kim
Summary: A stable and efficient Fe-Co catalyst derived from N-coordinated Co single-atom carbon was reported for CO2 conversion to long-chain hydrocarbons, showing high C5+ selectivity and conversion rate. The Fe-Co atomic alloy structure of the catalyst promotes oxygen removal and chain growth to suppress methane formation during the reaction.
Review
Chemistry, Multidisciplinary
Tesfalem Aregawi Atsbha, Taeksang Yoon, Park Seongho, Chul-Jin Lee
Summary: Replacing fossil fuels with renewable energy sources plays a fundamental role in creating a sustainable and carbon-free economy. Recent attention has been focused on the catalytic hydrogenation of CO2, emphasizing the development of efficient, selective, and stable catalysts. This review summarizes the current developments and improvements in catalytic conversion of CO2 towards the synthesis of CO, methanol, and hydrocarbons.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Chemistry, Multidisciplinary
Maria Batuecas, Richard Y. Kong, Andrew J. P. White, Mark R. Crimmin
Summary: Selective reactions that combine H-2, CO, and organic electrophiles to form hydrogenated C-3 and C-4 carbon chains have been reported. These reactions involve CO homologation mediated by [W(CO)(6)] and an aluminum(I) reductant, followed by functionalization and hydrogenation of the chain ends. Kinetics and DFT calculations provide insight into the hydrogenation of a metal-locarbene intermediate, revealing the controlled production of well-defined products with desired chain length and functionality.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Renjie Liu, John N. El Berch, Stephen House, Samuel W. Meil, Giannis Mpourmpakis, Marc D. Porosoff
Summary: In this work, a Ru-Co single atom alloy (SAA) catalyst has been demonstrated to produce C5+ hydrocarbons at a rate of 11.7 mu mol/s/g-cobalt (hexane basis) in a 50/50 CO/CO2 stream. The reaction operates at a relatively low temperature (200 degrees C) and high gas hourly space velocity (GHSV: 84,000 mL/g/h) that is compatible with the upstream reverse water-gas shift reaction.
Article
Chemistry, Physical
Renjie Liu, John N. El Berch, Stephen House, Samuel W. Meil, Giannis Mpourmpakis, Marc D. Porosoff
Summary: In this work, we demonstrate that a Ru-Co single atom alloy (SAA) catalyst can efficiently produce C5+ hydrocarbons at a relatively low temperature and high gas hourly space velocity using a CO/CO2 mixture. We also investigate the role of Ru dopants in the reduction of Co species and find that they enhance the catalytic activity for CO hydrogenation.
Article
Engineering, Environmental
Ju Young Maeng, Seon Young Hwang, Young Jun Kim, Choong Kyun Rhee, Youngku Sohn
Summary: In this study, Au/Ti electrocatalysts were used for electrochemical CO2 reduction and CO reduction. The main gas products were found to be CO, H2, and CH4, with the CO2 reduction process producing long-chain hydrocarbons. Similarly, the direct CO adsorption for CO reduction also resulted in the production of CH4 and long-chain hydrocarbons. Furthermore, an EC method mimicking Fischer-Tropsch synthesis was demonstrated, providing insights into surface polymerization reactions involving CO and CHx insertion.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Haefa Mansour, Enrique Iglesia
Summary: This study investigates the catalytic routes for upgrading CO2 to CO and hydrocarbons on dispersed Ru nanoparticles, revealing the elementary steps involved in these reactions and shedding light on the mechanism of CO2 activation. The kinetic hurdles in forming CH4 from CO2 are shown to stem not from the inertness of CO2 itself, but from the intermediate formation of CO molecules and the rate inhibition caused by chemisorbed CO. The findings are based on a combination of spectroscopic, isotopic, and kinetic measurements, highlighting the importance of considering the effects of nanoparticle structure and composition on reactivity and selectivity in CO2-H2 reactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Kun Gong, Yao Wei, Yuanyuan Dai, Tiejun Lin, Fei Yu, Yunlei An, Xinxing Wang, Fanfei Sun, Zheng Jiang, Liangshu Zhong
Summary: By designing carbon layers confined cobalt metal core-shell nanocatalyst, this study achieves highly selective Fischer-Tropsch to olefins synthesis with good stability and reduced CH4 and CO2 formation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Tobias F. Kimpel, Jin-Xun Liu, Wei Chen, Robert Pestman, Emiel J. M. Hensen
Summary: Through IR spectroscopy and DFT calculations, it has been discovered that in the Fischer-Tropsch reaction, Mn promotes a silica-supported Co catalyst with a MnO layer covering the Co surface, activating adsorbed CO through reaction with an oxygen vacancy. This results in higher activity, higher CHx coverage, increased C5+ selectivity, and decreased CH4 selectivity. Increasing pressure amplifies the selectivity differences. However, above around 4 bar, the addition of Mn decreases C5+ selectivity, possibly due to its promotion of C-O bond dissociation but not chain growth. Migration of formed monomers for chain growth on the Co surface may be hindered by high CO coverage, especially at high pressure.
JOURNAL OF CATALYSIS
(2023)
Article
Energy & Fuels
Dalia Liuzzi, Francisco J. Perez-Alonso, Sergio Rojas
Summary: Ru-Co/Al2O3 and Ru-Fe/Al2O3 catalysts prepared by reduction-deposition method exhibit high activity in Fischer-Tropsch Synthesis, showing different conversion rates and product selectivity. The interaction between Ru and Co in Ru-Co/Al2O3 enhances the activity, while Ru-Fe/Al2O3 displays superior initial performance but declines over time, with less enriched products compared to Ru/Al2O3.
