On the effect of Li or Na doping on Ru/TiO2 catalyst for CO2 methanation

IF 5.2 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today Pub Date : 2025-02-20 DOI:10.1016/j.cattod.2025.115245

Stefano Cimino, Elisabetta Maria Cepollaro, Luciana Lisi

引用次数: 0

Abstract

Metal-support interactions can widely affect or even dominate the catalytic activity, selectivity, and stability of supported Ru nanoparticles during the CO₂ methanation. In this work, we report on the effects of doping a Ru/TiO₂ catalyst with either Li or Na (3 % wt.) with the general aim to provide a large pool of surface basic sites of weak/medium strength capable to promote CO₂ adsorption and methanation at low temperature. However, catalytic kinetic measurements show that both alkali metals hinder the activity of the parent catalyst by different mechanisms. Detailed catalysts characterization (by XRD, porosimetric analysis, CO-DRIFTS, CO₂-TPD and H₂-TPSR) and operando DRIFTS experiments are used to evaluate the specific impact on the type of CO₂-derived adsorbed and intermediate species and on possible reaction pathways by also comparing the results with analogue Ru-catalysts supported on γ-Al₂O₃

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Catalysis Today 化学-工程：化工

CiteScore

11.50

自引率

3.80%

发文量

573

审稿时长

2.9 months

期刊介绍： Catalysis Today focuses on the rapid publication of original invited papers devoted to currently important topics in catalysis and related subjects. The journal only publishes special issues (Proposing a Catalysis Today Special Issue), each of which is supervised by Guest Editors who recruit individual papers and oversee the peer review process. Catalysis Today offers researchers in the field of catalysis in-depth overviews of topical issues. Both fundamental and applied aspects of catalysis are covered. Subjects such as catalysis of immobilized organometallic and biocatalytic systems are welcome. Subjects related to catalysis such as experimental techniques, adsorption, process technology, synthesis, in situ characterization, computational, theoretical modeling, imaging and others are included if there is a clear relationship to catalysis.