Boosting Ru atomic efficiency of LaFe0.97Ru0.03O3via knowledge-driven synthesis design

Yu Wang; Paul Paciok; Lukas Pielsticker; Alexander Spriewald Luciano; Lorena Glatthaar; Aijie Xu; Zimo He; Min Ding; Walid Hetaba; Jaime Gallego; Yanglong Guo; Bernd M. Smarsly; Herbert Over

doi:10.1039/D5SC00778J

Boosting Ru atomic efficiency of LaFe_0.97Ru_0.03O₃via knowledge-driven synthesis design†

Yu Wang,^ab Paul Paciok,^c Lukas Pielsticker,

^d Alexander Spriewald Luciano,

^b Lorena Glatthaar,^b Aijie Xu,^a Zimo He,^a Min Ding,^a Walid Hetaba,

^d Jaime Gallego,^be Yanglong Guo,

*^a Bernd M. Smarsly

*^be and Herbert Over

*^be

Author affiliations

* Corresponding authors

^a State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, PR China
E-mail: ylguo@ecust.edu.cn

^b Institute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany
E-mail: Herbert.Over@phys.Chemie.uni-giessen.de, Bernd.Smarsly@phys.Chemie.uni-giessen.de

^c Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich GmbH, Jülich, Germany

^d Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany

^e Center for Materials Research, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany

Abstract

The exsolution of ruthenium from a 3 at% ruthenium-substituted LaFeO₃ (LFR3) perovskite oxide is meticulously designed to produce a high-performance ruthenium-supported catalyst with high atomic efficiency. A high-temperature redox pretreatment at 800 °C enriches the Ru concentration in the near-surface region of LFR3, while a subsequent mild reduction step with H₂ at 500 °C leads to the Ru exsolution from the Ru-enriched near-surface region (LFR3_Redox_500R), resulting in a high density of small particles that are not passivated by LaO_x. The performance of this catalyst is evaluated through its application in two prototypical catalytic reactions: the combustion of propane (oxidation reaction) and the reduction of CO₂ by hydrogenation (reduction reaction). For both reactions, the activity of the redox-pretreated sample LFR3_Redox_500R exhibits a significant increase compared to the activity of the untreated sample (LFR3_500R). In the catalytic hydrogenation of CO₂, the high selectivity profile undergoes a transition from CO for LFR3_500R to methane for LFR3_Redox_500R.

This article is part of the themed collection: 2025 Chemical Science HOT Article Collection

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Boosting Ru atomic efficiency of LaFe_0.97Ru_0.03O₃via knowledge-driven synthesis design†

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