Boosting Ru atomic efficiency of LaFe<sub>0.97</sub>Ru<sub>0.03</sub>O<sub>3</sub><i>via</i> knowledge-driven synthesis design
The exsolution of ruthenium from a 3 at% ruthenium-substituted LaFeO<sub>3</sub> (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 H<sub>2</sub> 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 <sub><i>x</i></sub> . 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 CO<sub>2</sub> 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 CO<sub>2</sub>, the high selectivity profile undergoes a transition from CO for LFR3_500R to methane for LFR3_Redox_500R.
Authors
- Lorena Glatthaar
- Min Ding (ORCID: https://orcid.org/0000-0002-6373-7929)
- Lukas Pielsticker (ORCID: https://orcid.org/0000-0001-9361-8333)
- Paul Paciok (ORCID: https://orcid.org/0000-0002-3432-3321)
- Walid Hetaba (ORCID: https://orcid.org/0000-0003-4728-0786)
- Zimo He (ORCID: https://orcid.org/0000-0001-5890-8554)
- Alexander Spriewald Luciano (ORCID: https://orcid.org/0000-0002-6375-4809)
- Herbert Over (ORCID: https://orcid.org/0000-0001-7689-7385)
- Jaime Gallego (ORCID: https://orcid.org/0000-0003-0349-2170)
- Yanglong Guo (ORCID: https://orcid.org/0000-0003-0021-9128)
- Bernd M. Smarsly (ORCID: https://orcid.org/0000-0001-8452-2663)
- Yu Wang (ORCID: https://orcid.org/0000-0002-3639-3147)
- Aijie Xu
Institutions
- East China University of Science and Technology (CN)
- Justus-Liebig-Universität Gießen (DE)
- Ernst Ruska Centre (DE)
- Max Planck Institute for Chemical Energy Conversion (DE)
Publication Details
- Journal
- Chemical Science
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5sc00778j
- Citations
- 5
- Primary Topic
- Catalytic Processes in Materials Science
- Type
- article
- Field-Weighted Citation Impact
- 2.59
Funders
- Deutsche Forschungsgemeinschaft
- National Natural Science Foundation of China
- Max-Planck-Gesellschaft
- Bundesministerium für Wirtschaft und Energie
- Higher Education Discipline Innovation Project
- National Key Research and Development Program of China
- Division of Materials Research