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- Title
Steering the reaction pathway of syngas-to-light olefins with coordination unsaturated sites of ZnGaO<sub>x</sub> spinel.
- Authors
Li, Na; Zhu, Yifeng; Jiao, Feng; Pan, Xiulian; Jiang, Qike; Cai, Jun; Li, Yifan; Tong, Wei; Xu, Changqi; Qu, Shengcheng; Bai, Bing; Miao, Dengyun; Liu, Zhi; Bao, Xinhe
- Abstract
Significant progress has been demonstrated in the development of bifunctional oxide-zeolite catalyst concept to tackle the selectivity challenge in syngas chemistry. Despite general recognition on the importance of defect sites of metal oxides for CO/H2 activation, the actual structure and catalytic roles are far from being well understood. We demonstrate here that syngas conversion can be steered along a highly active and selective pathway towards light olefins via ketene-acetate (acetyl) intermediates by the surface with coordination unsaturated metal species, oxygen vacancies and zinc vacancies over ZnGaOx spinel−SAPO-34 composites. It gives 75.6% light-olefins selectivity and 49.5% CO conversion. By contrast, spinel−SAPO-34 containing only a small amount of oxygen vacancies and zinc vacancies gives only 14.9% light olefins selectivity at 6.6% CO conversion under the same condition. These findings reveal the importance to tailor the structure of metal oxides with coordination unsaturated metal sites/oxygen vacancies in selectivity control within the oxide-zeolite framework for syngas conversion and being anticipated also for CO2 hydrogenation. Great progress has been made in the development of bifunctional oxide-zeolite catalysts to tackle the selectivity challenge in syngas chemistry. Here the authors show syngas conversion can be steered along a highly active and selective pathway towards light olefins via ketene acetate (acetyl) intermediates.
- Subjects
CATALYST selectivity; ALKENES; SPINEL; SYNTHESIS gas; METAL defects; ACETATES; METALLIC oxides
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-30344-1