What question did this study set out to answer?

This research aims to investigate the impact of H2O treatment on catalyst performance and selectivity during CO2 hydrogenation.

March 15, 2026

Switching CO 2 Hydrogenation Selectivity from CO to CH 4 via H 2 O-Induced Reconstruction on Ni/MoO 2 Catalysts

Puntos clave

This research aims to investigate the impact of H2O treatment on catalyst performance and selectivity during CO2 hydrogenation.
Examined Strong metal–support interaction on Ni/MoO2 catalysts.
Utilized H2O vapor treatment to induce changes in the support material.
Assessed the selectivity switch between CO and CH4 during the reaction.
Demonstrated a switch in selectivity from ∼100% CO to 98.2% CH4.
Established the formation of encapsulated Ni@MoOx structure during reduction.
Highlighted H2O-induced reconstruction as an effective strategy for catalyst tuning.

Resumen

Strong metal–support interaction (SMSI) can lead to formation of suboxide overlayers, coating metal particles and reducing their accessibility. Here, we report that on Ni/MoO2 an encapsulated Ni@MoOx structure forms owing to the SMSI effect during reduction and CO2 hydrogenation reaction, while H2O vapor treatment dramatically removes the MoOx overlayer by transforming MoO2 and Mo4O11 into MoO3. This reconstruction facilitates monodentate-formate-mediated CO2 methanation. The optimized 15Ni/MoO2 catalyst treated with 50% H2O vapor switches the selectivity from ∼100% of CO to 98.2% of CH4. This work establishes an effective strategy for tuning SMSI by H2O-induced reconstruction to develop CO2 methanation catalysts.

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Cite This Study

Han et al. (Fri,) studied this question.

synapsesocial.com/papers/69b5ff8d83145bc643d1c644 https://doi.org/https://doi.org/10.1021/acscatal.5c09207

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