Stabilization of Metal Single Atoms on Carbon and TiO2 Supports for CO2 Hydrogenation: The Importance of Regulating Charge Transfer

• DOI: 10.1002/admi.202001777
• Publication Date: 2020-11-16T09:53:11Z
• Authors: Camila Rivera‐Cár...; Canio Scarfiello; Ana B. García; Yann Tison; Hervé Martinez; Walid Baaziz; Ovidiu Ersen; Carole Le Berre; Philippe Serp
• Keywords: Carbon fibers

Abstract Supported single atoms constitute excellent models for understanding heterogenous catalysis and have achieved breakthroughs during the past years. How to prevent aggregation modulate activity of these species via metal‐support interaction should be considered practical applications. This work presents simple methods involving creation carbon‐ (on carbon nanotube (CNT)) or oxygen‐vacancies TiO 2 ) stabilize nickel ruthenium atoms. The defective supports resulting catalysts are characterized by a large variety techniques. These analyses show that this strategy is efficient preparation ultra‐dispersed catalysts. Comparison catalytic performances CO hydrogenation reaction also reported. Catalysts supported on more active sometimes stable than those deposited CNT. Nickel very selective production CO, methane. Most importantly, it shown that, in case Ru, direct correlation exists between electronic density metal selectivity; electron‐rich produce selectively methane, while electron‐deficient orientate selectivity toward CO. may figure new way synthesis various