Selective Transformation of Inactive Ru Lateral Surfaces toward Highly Active TiO <sub> <i>x</i> </sub> /Ru <sup>δ+</sup> Interfaces for CO <sub>2</sub> Methanation
Ru-based catalysts are recognized as highly promising candidates for CO2 methanation, but the precise construction of the active center remains a significant challenge. We developed a strategy using atomic layer deposition (ALD) to selectively transform typically inactive Ru (101) lateral surfaces into TiOx/Ruδ+ interfaces. A volcano-type relationship between catalytic activity and ALD cycle numbers was established, with the optimized 30-TiOx/Ru catalyst achieving CO2 conversion and CH4 yield 3–9 times higher than those of the unmodified Ru catalyst at 498–573 K. Mechanistic investigations reveal that the TiOx/Ruδ+ interfaces enhance CO2 adsorption, while the residual Ru (001) terraces are responsible for H2 dissociation. Kinetic matching between CO2 and H2 activation facilitates CH4 generation via the CO*-mediated route. This study offers a robust strategy for atomic-scale synthesis of catalysts and provides a comprehensive framework for decoding interfacial catalysis.
Authors
- Zheng Shen (ORCID: https://orcid.org/0009-0002-0373-7262)
- Xiaofeng Yang (ORCID: https://orcid.org/0000-0001-5012-5651)
- M. Z. Wang (ORCID: https://orcid.org/0009-0008-3961-505X)
- Yanqiang Huang (ORCID: https://orcid.org/0000-0002-7556-317X)
- Hongying Zhuo (ORCID: https://orcid.org/0000-0001-5049-0851)
- Chaoyue Zhang (ORCID: https://orcid.org/0009-0005-2599-953X)
- Tianyu Zhang (ORCID: https://orcid.org/0000-0002-4488-5096)
- Chongya Yang
- Weijue Wang
Institutions
- Dalian Institute of Chemical Physics (CN)
- Chinese Academy of Sciences (CN)
- Beijing Forestry University (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- ACS Materials Letters
- Published
- 2025-12-02
- DOI
- https://doi.org/10.1021/acsmaterialslett.5c01243
- Primary Topic
- Catalysts for Methane Reforming
- Type
- article
- Field-Weighted Citation Impact
- 0.00