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Updated: Sep 23, 2025

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Published on: December 6, 2021
Collateral hydrogenation over proton-conducting Ni/BaZr0.85Y0.15O3- catalysts for promoting CO2 methanation
Sungjun Choi1,2, Sung Min Choi1, Kyung Joong Yoon1
1High-Temperature Energy Materials Research Center, Korea Institute of Science and Technology 5 Hwarang-ro 14-gil, Seongbuk-gu Seoul 02792 Republic of Korea hyoungchul@kist.re.kr.
Abstract:
Despite the importance of CO2 methanation for eco-friendly carbon-neutral fuel recycling, the current technologies, relying on catalytic hydrogenation over metal-based catalysts, face technological and economical limitations. Herein, we employ the steam hydrogenation capability of proton conductors to achieve collateral CO2 methanation over the Ni/BaZr0.85Y0.15O3- catalyst, which is shown to outperform its conventional Ni/Al2O3 counterpart in terms of CH4 yield (8% higher) and long-term stability (3% higher for 150 h) at 400 °C while exhibiting a CH4 selectivity above 98%. Moreover, infrared and X-ray photoelectron spectroscopy analyses reveal the appearance of distinct mobile proton-related OH bands during the methanation reaction.
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