Phase transition of SiC support induces dispersed Na <sub>2</sub> WO <sub>4</sub> catalysts for CH <sub>3</sub> Cl-to-C <sub>2</sub> H <sub>3</sub> Cl conversion
The development of efficient CH<sub>3</sub>Cl-to-C<sub>2</sub>H<sub>3</sub>Cl catalysts remains challenging due to the poor dispersion of Na<sub>2</sub>WO<sub>4</sub> at high loadings, which limits catalytic performance. This study addresses this issue by employing silicon carbide (SiC) as a support, which undergoes an <i>in situ</i> phase transformation to α-cristobalite during calcination, effectively enhancing Na<sub>2</sub>WO<sub>4</sub> dispersion even at 35 wt% loading. The resulting catalyst achieved a vinyl chloride selectivity of 35.1% and a yield of 31.4% at 700 °C, significantly outperforming conventional Na<sub>2</sub>WO<sub>4</sub>/SiO<sub>2</sub> catalysts synthesized with α-cristobalite. These findings highlight the importance of support-mediated phase transformations in designing high-performance MCTV catalysts, offering a sustainable pathway for VCM production.
Authors
- Yongzhong Bao (ORCID: https://orcid.org/0000-0002-8144-015X)
- Jie Fan (ORCID: https://orcid.org/0000-0002-8380-6338)
- Jianyong Ouyang (ORCID: https://orcid.org/0000-0001-9901-0177)
- Yue Wang (ORCID: https://orcid.org/0000-0002-0053-610X)
- Shihui Zou (ORCID: https://orcid.org/0000-0001-5564-4151)
- Yang Pan (ORCID: https://orcid.org/0000-0002-9360-3809)
- Chengyuan Liu (ORCID: https://orcid.org/0000-0001-5837-8063)
- Xutao Chen (ORCID: https://orcid.org/0009-0006-8435-8166)
- K. Wei
Institutions
- University of Science and Technology of China (CN)
- National Synchrotron Radiation Laboratory (CN)
- Zhejiang University of Technology (CN)
- Zhejiang University (CN)
Publication Details
- Journal
- Nanoscale
- Published
- 2025-12-09
- DOI
- https://doi.org/10.1039/d5nr03574k
- Primary Topic
- Zeolite Catalysis and Synthesis
- Type
- article
- Field-Weighted Citation Impact
- 0.00