Authors
Han Wang, Sheng Fan, Bo Zhou, Zhikai Li, Sen Wang, Mei Dong, Zhangfeng Qin, Jianguo Wang, Unni Olsbye, Weibin Fan
Published in
Angewandte Chemie (International ed. in English). Pages e2887110. Aug 23, 2026. Epub Aug 23, 2026.
Abstract
Preparation of a heterogeneous catalyst with ultra-high catalytic stability and target product selectivity of > 99% at near thermodynamic equilibrium conversion is the ultimate goal to pursue in the catalysis field. Here, a CoAlOx catalyst is constructed for CO2 methanation by precisely engineering metal-metal oxide interfaces. It shows CO2 conversion of > 87% and CH4 selectivity of > 99% within 3000 h at 350°C, 1 MPa and GHSV of 12 000 mL g-1 h-1. Further prolonging of reaction time to 5000 h just slightly decreases CO2 conversion to 77.5% without seriously affecting CH4 selectivity. The CH4 productivity approaches to 2463.6 mmol g-1 h-1 at GHSV of 375 000 mL g-1 h-1, being superior to reported noble metal- and transition metal-based catalysts. Such a catalytic performance stems from formation of Co0-CoO-Al2O3 microstructures with metallic Co0 nanoparticles stably trapped in atomically intimate CoO-Al2O3 material. The CoO-Al2O3 interfaces enhance CO2 adsorption and transformation into carbonates and/or bicarbonates, whereas metallic Co0 promote H2 dissociation and CO2 hydrogenation. Technical and economic analyses show that CO2 methanation could be profitable in places with abundant wind, photovoltaic, and other off-grid powers, or when the green hydrogen price is < 1103.40 US$/t, which could help build sustainable energy system in the future.
PMID:
42633669
Bibliographic data and abstract were imported from PubMed on 24 Aug 2026.
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