Thomas P. Sentfle

Rice University

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Xinwen Guo

Dalian University of Technology

Yi Liu

Beijing University of Chemical Technology

Guanghui Zhang

Dalian University of Technology

Fanshu Ding

Dalian University of Technology

Mingrui Wang

Peking University

Peng Wang

National Institute of Clean and Low-Carbon Energy

Kai Bian

Dalian University of Technology

Jianyang Wang

Chinese Academy of Sciences

Rongtan Li

Dalian Institute of Chemical Physics

Jie Zhu

Dalian University of Technology

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Dalian University of Technology

Dalian University

University of Chinese Academy of Sciences

Chinese Academy of Sciences

Pennsylvania State University

Beijing University of Chemical Technology

National Institute of Clean and Low-Carbon Energy

Peking University

Dalian Institute of Chemical Physics

State Key Laboratory of Catalysis

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In Situ Synthesis and Stabilization of Co2c for Co2 Hydrogenation to Valuable Hydrocarbon

SSRN Electronic Journal (2022)

Mingrui Wang Peng Wang Guanghui Zhang Yulong Liu Rongtan Li

Cobalt carbide (Co2C) is a promising catalyst in CO2 hydrogenation to commercial chemicals, whereas its facile synthesis and stabilization under reactions remain challenging, limiting its practical application. Herein, we report the in situ synthesis and stabilization of Co2C with K2CO3 modification during CO2 hydrogenation. Theoretical calculations elucidate that K enhances the accumulation of surface C atoms and the carburization. We demonstrate that carburization of cobalt oxide to Co2C is more facile than that of metallic cobalt and the stabilization of Co2C is dependent on the reaction atmosphere in conjunction with the K promoter. Notably, co-feeding 2 vol.% H2O can dramatically promote the carburization, as confirmed by in situ XRD and XPS analyses. The selectivity to C2+ products in hydrocarbons on Co2C reached 67.3% at 300 °C. This work provides a method to in situ synthesize Co2C and constitutes a fundamental understanding on its formation and stabilization in CO2 hydrogenation.

10.2139/ssrn.4186997

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Theoretical Insight into the No* Coverage-Dependent Selectivity of Pd and Cu Electrocatalysts for Nitrate Reduction Towards Ammonia or Dinitrogen

Yu Chen Thomas P. Sentfle

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10.2139/ssrn.4773766

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