Built-in tandem catalysis in hierarchical pores for efficient vinyl chloride production.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41794890.
- Also identified by DOI 10.1038/s41467-026-70329-y and PMC identifier 13096420.
- Licence recorded as CC BY-NC-ND.
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Abstract
Tandem catalysis over disparate active sites is frequently designed to promote the catalytic efficiency for industrial reactions. Herein, a built-in tandem system in a single hierarchical porous catalyst is constructed for vinyl chloride production from ethylene dichloride and acetylene cascade. Using a pore-selective filling strategy, Ru, CuRu, and AuRu components are sequentially confined in the macro-, meso- and micropores of carbon material. Mechanism study shows that ethylene-dichloride dehydrochlorination occurs on macropore Ru sites, generating vinyl chloride. H and Cl radicals react with acetylene on mesopore CuRu sites, and the residual acetylene is hydrochlorinated over micropore AuRu sites. The stronger acetylene adsorption of CuRu and AuRu in a VCM-rich atmosphere enables acetylene conversion near the thermodynamic limit and stable operation for 1200 h on stream. This built-in tandem catalysis in hierarchical pores provides a general paradigm for cascade reactions in a single porous catalyst.