ArticleNature chemistry2024
Deprotonated 2-thiolimidazole serves as a metal-free electrocatalyst for selective acetylene hydrogenation.
Article in Nature chemistry, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed.
- Balancing Dimerization and Hydrogenation Kinetics by Stabilizing CuAngewandte Chemie (International ed. in English) · 2026Article
- Time-dependent surface polarization breaks static scaling relationship for selective acetylene hydrogenation.Nature chemistry · 2026Article
- Switching Hydrogen Transfer Pathway Over Paddle-Wheel Dicopper Molecular Catalysts for Efficient Electrocatalytic Acetylene Semihydrogenation.Advanced materials (Deerfield Beach, Fla.) · 2026Article
- Electrosynthesis of 1,3-butadiene from dilute acetylene over coordination-modulated dicopper molecular catalysts.Nature communications · 2026Article
- Industrial-level co-electrosynthesis of alkenol and Mg(OH)Nature communications · 2026Article
- Electrocatalytic semi-hydrogenation of alkynes using water as the hydrogen source.Nature protocols · 2026Review
- Toward Industrial Electrosynthesis of Ethylene: Energy-Efficient and Stable Acetylene Semi-Hydrogenation on a Copper Phosphide/MXene Electrocatalyst.Angewandte Chemie (International ed. in English) · 2026Article
- Concentrating and directing energy flow in plasmonic heterostructures for stable and efficient light-driven methane dry reforming.Nature communications · 2026Article
- Ampere-level electroconversion of acetylene towards polymer grade ethylene via Pd-H mediated non-spillover hydrogenation.Nature communications · 2025Article
- Selective electrosynthesis of 1,3-butadiene by tailoring the coverage of acetylene and water.Nature communications · 2025Article
- Upcycling chlorinated trash into synthetic organic treasure.Nature chemistry · 2024Article
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Authors and funding
8 authors.
Funding
Abstract
Metal-free catalysts offer a desirable alternative to traditional metal-based electrocatalysts. However, metal-free catalysts, featuring defined active sites, rarely show activities as promising as metal-based materials. Here we report 2-thiolimidazole as an efficient metal-free catalyst for selective electrocatalytic hydrogenation of acetylene into ethylene. Under alkaline conditions, the sulfhydryl and imino groups of 2-thiolimidazole are spontaneously deprotonated into dianions. Deprotonation thus enriches the negative charges of pyridinic N sites in 2-thiolimidazole to enhance the adsorption of electrophilic acetylene through the σ-configuration. Ethylene partial current densities show a volcano relationship with the negative charges of the pyridinic N sites in various imidazole derivatives. Consequently, the deprotonated 2-thiolimidazole exhibits an ethylene partial current density and faradaic efficiency competitive with metal-based catalysts like Cu and Pd. This work highlights the tunability and promising potential of metal-free molecules in electrocatalysis.
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Registered trials
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