Switching CO <sub>2</sub> Hydrogenation Selectivity from CO to CH <sub>4</sub> via H <sub>2</sub> O-Induced Reconstruction on Ni/MoO <sub>2</sub> Catalysts
Strong metal–support interaction (SMSI) can lead to formation of suboxide overlayers, coating metal particles and reducing their accessibility. Here, we report that on Ni/MoO2 an encapsulated Ni@MoOx structure forms owing to the SMSI effect during reduction and CO2 hydrogenation reaction, while H2O vapor treatment dramatically removes the MoOx overlayer by transforming MoO2 and Mo4O11 into MoO3. This reconstruction facilitates monodentate-formate-mediated CO2 methanation. The optimized 15Ni/MoO2 catalyst treated with 50% H2O vapor switches the selectivity from ∼100% of CO to 98.2% of CH4. This work establishes an effective strategy for tuning SMSI by H2O-induced reconstruction to develop CO2 methanation catalysts.
Authors
- Jie Ding (ORCID: https://orcid.org/0009-0008-3104-3034)
- J G Wang
- Mengdi Wang (ORCID: https://orcid.org/0000-0002-2101-9507)
- Xiaoying Han
- Xiaofeng Yang
- Chaoyue Zhang
- Miao Ling
- Yanqiang Huang
- Hongying Zhuo
- Tianyu Zhang
- Bin Liu
- Zheng Shen
Institutions
- City University of Hong Kong (HK)
- Dalian Institute of Chemical Physics (CN)
- Chinese Academy of Sciences (CN)
- Beijing Forestry University (CN)
- Center for Advancing Health (US)
- University of Chinese Academy of Sciences (CN)
- Technische Universität Dresden (DE)
Publication Details
- Journal
- ACS Catalysis
- Published
- 2026-03-13
- DOI
- https://doi.org/10.1021/acscatal.5c09207
- Primary Topic
- Catalysts for Methane Reforming
- Type
- article
- Field-Weighted Citation Impact
- 0.00