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This work was financially supported by the National Natural Science Foundation of China (Grants 52000158, 22076168, 22278374 and 51978654), and the Zhejiang Provincial Natural Science Foundation of China (LZ24B070002). Stefanos Giannakis would like to acknowledge the ARPHILAKE project, "Combating Antibiotic Resistance in Philippine Lakes: One Health upstream interventions to reduce the burden", which received funding from the Agencia Estatal de Investigacion (Spain), Proyectos de Colaboracion Internacional (PCI2022-132918), under the umbrella of the "JPIAMR - Joint Programming Initiative on Antimicrobial Resistance", and the Spanish Ministry of Science, Innovation and Universities (MICIU) for the Ramoon y Cajal Fellowship (RYC2018-024033-I).
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Giannakis, StefanosAuthorTransforming Plain LaMnO3 Perovskite into a Powerful Ozonation Catalyst: Elucidating the Mechanisms of Simultaneous A and B Sites Modulation for Enhanced Toluene Degradation
Publicated to:Environmental Science & Technology. 58 (27): 12167-12178 - 2024-06-26 58(27), DOI: 10.1021/acs.est.4c00809
Authors: Wang D; Luo K; Tian H; Cheng H; Giannakis S; Song Y; He Z; Wang L; Song S; Fang J; Ma J
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Abstract
Herein, we propose preferential dissolution paired with Cu-doping as an effective method for synergistically modulating the A- and B-sites of LaMnO3 perovskite. Through Cu-doping into the B-sites of LaMnO3, specifically modifying the B-sites, the double perovskite La2CuMnO6 was created. Subsequently, partial La from the A-sites of La2CuMnO6 was etched using HNO3, forming novel La2CuMnO6/MnO2 (LCMO/MnO2) catalysts. The optimized catalyst, featuring an ideal Mn:Cu ratio of 4.5:1 (LCMO/MnO2-4.5), exhibited exceptional catalytic ozonation performance. It achieved approximately 90% toluene degradation with 56% selectivity toward CO2, even under ambient temperature (35 degrees C) and a relatively humid environment (45%). Modulation of A-sites induced the elongation of Mn-O bonds and decrease in the coordination number of Mn-O (from 6 to 4.3) in LCMO/MnO2-4.5, resulting in the creation of abundant multivalent Mn and oxygen vacancies. Doping Cu into B-sites led to the preferential chemisorption of toluene on multivalent Cu (Cu(I)/Cu(II)), consistent with theoretical predictions. Effective electronic supplementary interactions enabled the cycling of multiple oxidation states of Mn for ozone decomposition, facilitating the production of reactive oxygen species and the regeneration of oxygen vacancies. This study establishes high-performance perovskites for the synergistic regulation of O-3 and toluene, contributing to cleaner and safer industrial activities.
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Bibliometric impact. Analysis of the contribution and dissemination channel
The work has been published in the journal Environmental Science & Technology due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2024 there are still no calculated indicators, but in 2023, it was in position 7/81, thus managing to position itself as a Q1 (Primer Cuartil), in the category Engineering, Environmental. Notably, the journal is positioned above the 90th percentile.
Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.
Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-07-04:
- WoS: 3
- Scopus: 11
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Leadership analysis of institutional authors
This work has been carried out with international collaboration, specifically with researchers from: China.