Selective CO Evolution from CO2 over Ag-Ni-Based Cocatalyst-Modified Perovskite under Simulated Solar Light
Baratov A. Daulbayev C. Kuspanov Z.
26 December 2025Institute of Combustion Problems, al-Farabi Kazakh State National University
Eurasian Chemico-Technological Journal
2025#27Issue 4281 - 287 pp.
Photocatalytic CO2 reduction offers a dual benefit of mitigating greenhouse gas emissions while generating renewable fuels. In this study, a composite photocatalyst based on aluminum-doped strontium titanate (Al-STO) was synthesized via a flux method and modified with dual cocatalysts: metallic Ag (reductive site) and a Ni-based species (oxidative site). Sequential photodeposition enabled precise loading, yielding a catalyst with enhanced charge separation and suppressed recombination. Structural and spectroscopic analyses confirmed the uniform dispersion of cocatalysts and broadened light absorption into the visible range. Photocatalytic evaluation under simulated solar light revealed a more than twofold increase in CO production (24.2 μmol·g-1·h-1) and high selectivity (up to 99%), compared to pristine Al-STO. The observed performance enhancement is attributed to the synergistic interaction between Ag and the Ni-based cocatalyst, enabling spatially resolved charge carrier pathways. These results highlight the promise of cocatalyst engineering on perovskite surfaces for selective CO2-to-fuel conversion under solar irradiation.
Al-STO photocatalyst , Charge carrier separation , CO selectivity , CO2 photoreduction , Dual cocatalyst photodeposition
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Satbayev University, 22 Satbayev str., Almaty, 050013, Kazakhstan
Institute of Nuclear Physics, 1 Ibragimov str., Almaty, 050032, Kazakhstan
Satbayev University
Institute of Nuclear Physics
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