Design of Amorphous Carbon-Coated Cobalt Nanoparticles on a Hybrid Composite: Tuning the Stable Co-Active Phase for Efficient Production of Liquid Fuels via Fischer–Tropsch Synthesis

作者：Md. Shahajahan Kutubi, Katsutoshi Sato, David S. Rivera Rocabado, Mika Aizawa, Takayoshi Ishimoto, Satoshi Inagaki, Yoshihiro Kubota, Takaaki Toriyama, Tomokazu Yamamoto, Yasukazu Murakami, Katsutoshi Nagaoka · 发表于：ACS Catalysis · 年份：2025 · DOI：10.1021/acscatal.5c02066 · 被引用次数：6 · 研究领域：Catalysts for Methane Reforming、Catalytic Processes in Materials Science、Catalysis and Oxidation Reactions

High Resolution Image Download MS PowerPoint Slide To mitigate the rise of global temperatures caused by anthropogenic CO 2 emissions, great effort has been directed to the design of highly active Co catalysts for the production of liquid fuels (LFs, C 5 –C 19 hydrocarbons) for transport via Fischer–Tropsch Synthesis (FTS). However, challenges such as high CH 4 and CO 2 formation at high CO conversion and rapid catalyst deactivation have led to low LF yields. Here, we report that an amorphous carbon ( a -C) coating around Co nanoparticles (NPs) supported on γ-Al 2 O 3 hybridized with H + –ZSM-5 plays a combined role in producing long-chain hydrocarbons and their cracking to improve the selectivity to LFs. Specifically, inclusion of a -C secured the Co NPs, resulting in 64% yields of LFs with a decrease of CH 4 and CO 2 formation at 1.0 MPa. Further characterization of the catalyst indicated that the a -C coating minimized defects on the surface of the Co NPs that promotes CH 4 formation/chain termination and reduced the number of active sites for the water–gas shift reaction at the interface between the Co and support. In addition, the a -C coating prevented movement of the Co NPs, reducing the level of sintering and coking of the catalyst. Using our a -C-coated catalyst, we were able to obtain a high LF selectivity and high CO conversion at a low pressure (1.0 MPa), and the catalyst showed very high durability up to a total time on stream of 100 h across two 50 h cycles in a...