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<p>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.</p>

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Built-in tandem catalysis in hierarchical pores for efficient vinyl chloride production

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月7日

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  • Bolin Wang,
  • Xingyun Li,
  • Yuxue Yue,
  • Shuheng Tian,
  • Ruoting Liu,
  • Haifeng Zhang,
  • Ding Ma

摘要

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.