Lattice-Oxygen Mobility across Inverse Oxide–Perovskite Interfaces for Low-Temperature CO Oxidation

Michael Tsz-Hin Lau; Karen Hoi-Yan Wong; Daniel Ka-Wai Chan

Abstract

Low-temperature CO oxidation over inverse oxide–perovskite catalysts is governed by the mobility of active oxygen species at the interface. In this work, inverse CuOx/perovskite catalysts were prepared by depositing dispersed CuOx domains on La-based perovskite supports and evaluated for CO oxidation between 80 and 180°C. H2-TPR, O2-TPD, in situ Raman spectroscopy, and 18O2 isotopic exchange experiments were used to probe active-oxygen transport. The optimized catalyst achieved 90% CO conversion at 116°C, which was 48°C lower than that of the bare perovskite support. Isotope experiments showed that the lattice-oxygen exchange rate increased from 0.31 to 0.86 μmol g⁻¹ s⁻¹ after CuOx modification. In situ Raman spectra confirmed reversible formation of interfacial Cu–O–M species during CO oxidation. The results indicate that inverse oxide domains accelerate Mars–van Krevelen redox cycling by improving oxygen migration across the oxide–perovskite boundary.

Keywords

CO oxidationinverse catalystCuOxperovskitelattice oxygenoxygen mobilityMars–van Krevelen mechanism

References

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Publication details

Journal: Journal of Artificial Intelligence and Interdisciplinary Research
Volume: 1 (2026)
Article number: aji20260003
License: CC BY 4.0

[1] Gu, X. (2026). Identifying Causal Effects and Analyzing Heterogeneity of User Growth Interventions on Digital Platforms: Evidence from Large-Scale Behavioral Data. Available at SSRN 6809181.

[2] Hassan, A. A., Farrag, M., Gabr, R. M., & Said, M. I. (2025). Enhanced Dehydrogenation of 2-Propanol via Surface Synergism of CuO@ Nanostructured Ceria Derived from Modified Ce-UiO-66. Catalysis Letters, 155(10), 334.

[3] You, S. (2026). Verifiable Audit Mechanisms in AI Compliance Automation: Scalability. Available at SSRN 6547458.

[4] Yang, Z., Alexandrova, A. N., & Sautet, P. (2026). Modeling CO2 Hydrogenation to Methanol on an Ensemble of Inverse ZrO2 on Cu Catalytic Sites: Mechanism, Reactivity, and Deactivation. Angewandte Chemie, e5448247.

[5] Christy, M., Choi, S., Kwon, J., Jeong, J., Paik, U., & Song, T. (2025). The perfect imperfections of perovskite oxide catalysts in the aspect of defect equilibria. Small Science, 5(1), 2400386.

[6] Jiao, Y., Shi, T., Zhao, B., & Wang, A. (2026). The Impact of VR Sketching Simulations on the Assessment of Scale and Site Suitability in Public Art Spaces.

[7] Diaz, D., Arias, D., Díaz de León, J. N., Dongil, A. B., Martínez-Quintana, L., Escalona, N., ... & Sepulveda, C. (2026). Effect of Partial Co and Fe Substitution on LaFeO3@ C, LaCoO3@ C Catalysts in the Oxidation of Furfural. Reactions, 7(2), 28.

[8] Liang, S., Zhang, X., Du, Y., & Chen, W. (2026). Supply Network Restructuring and Capacity Ramp-Up Limits in the Localized Expansion of High-Performance Computing Equipment Production. Available at SSRN 7339738.

[9] Bao, Y., & Wang, H. (2026). Edge-to-Cloud Infrastructure Continuum: A Unified Framework for Optimizing Industrial IoT Systems. Available at SSRN 7185578.

[10] Hussain, A., Hussain, M., Khan, M. T., Park, D., Ud Din, H., Myoung, N., ... & Son, Y. (2026). Electro-Optical Correlation of Charge-Transfer Kinetics in Composition-Tuned Wurtzite Oxide Anodes for Sodium-Ion Storage. Materials, 19(17), 3643.

[11] Chen, F., Liang, H., Li, S., Yue, L., & Xu, P. (2025). Design of Domestic Chip Scheduling Architecture for Smart Grid Based on Edge Collaboration.

[12] Kumar, N., Najimu, M. O., Cho, Y. J., Gilliard-AbdulAziz, K. L., Nikolla, E., Wu, Z., & Wachs, I. E. (2025). Probing surface/bulk structural chemistry of key components of solid oxide electrochemical cells with in situ/operando Raman spectroscopy. Chemical Reviews, 125(18), 8921.

[13] Liang, R., Feifan, F. N. U., Liang, Y., & Ye, Z. (2025). Emotion-Aware Interface Adaptation in Mobile Applications Based on Color Psychology and Multimodal User State Recognition. Frontiers in Artificial Intelligence Research, 2(1), 51-57.

[14] Hadjiivanov, K., Panayotov, D., & Mihaylov, M. (2026). Isotopic labeling in IR spectroscopy of surface species: A powerful approach to advanced surface investigations. Catalysts, 16(1), 57.

[15] Du, Y. (2025). Research on Digital Quality Traceability System for Temperature-Controlled Supply Chain of Foreign Trade Wine Driven by Blockchain and IoT. Business and Social Sciences Proceedings, 4, 57-65.

[16] Nunes, L. J. (2026). Controlling oxygen in biomass-to-energy chemistry: catalytic pathways from lignocellulosic oxygenates to renewable fuels and energy carriers. Biofuels, 1-21.

[17] Jiao, Y., Zhao, B., Wang, A., & Shi, T. (2026). Construction and Empirical Study of a Modularized Teaching System for Art Courses Based on a Unified Training Pathway.

[18] Schichtl, Z. G., Carvalho, O. Q., Tan, J., Saund, S. S., Ghoshal, D., Wilder, L. M., ... & Greenaway, A. L. (2025). Chemistry of materials underpinning photoelectrochemical solar fuel production. Chemical Reviews, 125(10), 4768.

[19] Yang, J. (2026). Stage‐Coupled Computational Framework for Stratiﬁed Accessibility and Equity Analysis in Community‐Based Elderly Care Services.

[20] Feldl, J., Gillen, R., Maultzsch, J., Papadogianni, A., Kler, J., Galazka, Z., ... & Ramsteiner, M. (2025). Unravelling the oxygen influence in cubic bixbyite In2O3 on Raman active phonon modes by isotope studies. Journal of Materials Chemistry C, 13(47), 23545-23553.

[21] Wu, J., Wu, D., Zhang, J., & Peng, Y. (2026). Generative AI Feedback in Junior High School Artistic Creation Evaluation. Available at SSRN 7244838.

[22] Cattelan, M., Yang, J., Cielo, L., Nappini, S., Carlotto, S., Nalesso, M., ... & Agnoli, S. (2025). Operando Exploration of CoAl‐LDH: Transformations Driving Alkaline Oxygen Evolution Reaction. Small, 21(19), 2412351.

[23] Bao, Y., Qiu, Y., & Wang, H. (2026, May). Unified Identity Layer for Hyperscale Ecosystems: A Framework for Cross-Platform User Attribution and Experimentation. In 2026 6th International Conference on Machine Learning and Intelligent Systems Engineering (MLISE) (pp. 540-543). IEEE.

[24] Cano-Blanco, D. C., Fischer, J. W., Buttignol, F., Alxneit, I., Jeschke, G., Krocher, O., & Ferri, D. (2025). Monomeric Fe in six-membered rings at work: operando spectroscopy of nitrous oxide activation and decomposition over Fe-exchanged zeolites. ACS Catalysis, 15(17), 15579-15595.