Stabilizing Co 2 C with H 2 O and K promoter for CO 2 hydrogenation to C 2+ hydrocarbons

• DOI: 10.1126/sciadv.adg0167
• Publication Date: 2023-06-16T17:58:40Z
• Authors: Mingrui Wang; Peng Wang; Guanghui Zhang; Zening Cheng; Mengmeng Zhang; Yulong Liu; Rongtan Li; Jie Zhu; Jianyang Wang; Kai Bian; Yi Liu; Fanshu Ding; Thomas P. Senftle; Xiaowa Nie; Qiang Fu; Chunshan Song; Xinwen Guo
• Keywords: Atmosphere; Physical and Materials Sciences; Hydrogenation; Adsorption; Carbon Dioxide; 01 natural sciences; Hydrocarbons; 0104 chemical sciences

The decomposition of cobalt carbide (Co 2 C) to metallic in CO hydrogenation results a notable drop the selectivity valued C 2+ products, and stabilization Co remains grand challenge. Here, we report an situ synthesized K-Co catalyst, hydrocarbons achieves 67.3% at 300°C, 3.0 MPa. Experimental theoretical elucidate that CoO transforms reaction, while is dependent on reaction atmosphere K promoter. During carburization, promoter H O jointly assist formation surface * species via carboxylate intermediate, adsorption enhanced by lifetime further prolonged from 35 hours over 200 co-feeding O. This work provides fundamental understanding toward role chemistry, as well potential extending its application other reactions.