Overturning CO2 Hydrogenation Selectivity with High Activity via Reaction-Induced Strong Metal–Support Interactions

• DOI: 10.1021/jacs.1c12603
• Publication Date: 2022-03-08T18:41:58Z
• Authors: Hui Xin; Le Lin; Rongtan Li; Dan Li; Tongyuan Song; Rentao Mu; Qiang Fu; Xinhe Bao
• Keywords: Methanation; Nanomaterial-based catalyst

Encapsulation of metal nanoparticles by support-derived materials known as the classical strong metal-support interaction (SMSI) often happens upon thermal treatment supported catalysts at high temperatures (≥500 °C) and consequently lowers catalytic performance due to blockage active sites. Here, we show that this SMSI state can be constructed in a Ru-MoO3 catalyst using CO2 hydrogenation reaction gas low temperature 250 °C, which favors selective CO. During reaction, Ru facilitate reduction MoO3 generate MoO3-x overlayers with oxygen vacancies, migrate onto nanoparticles' surface form encapsulated structure, is, Ru@MoO3-x. The formed changes 100% CH4 selectivity on fresh particle surfaces above 99.0% CO excellent activity long-term stability. encapsulating oxide layers removed via O2 treatment, switching back completely methanation. This work suggests encapsulation nanocatalysts dynamically generated real reactions, helps gain target products activity.