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Nanostructured manganese oxides as highly active catalysts for enhanced hydrolysis of bis(4-nitrophenyl)phosphate and catalytic decomposition of methanol
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SYSNO ASEP 0541518 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Nanostructured manganese oxides as highly active catalysts for enhanced hydrolysis of bis(4-nitrophenyl)phosphate and catalytic decomposition of methanol Author(s) Šťastný, Martin (UACH-T) SAI, RID
Issa, G. (BG)
Popelková, Daniela (UACH-T) SAI
Ederer, J. (CZ)
Kormunda, M. (CZ)
Kříženecká, S. (CZ)
Henych, Jiří (UACH-T) SAI, RID, ORCIDNumber of authors 7 Source Title Catalysis Science &Technology. - : Royal Society of Chemistry - ISSN 2044-4753
Roč. 11, č. 5 (2021), s. 1766-1779Number of pages 14 s. Language eng - English Country GB - United Kingdom Keywords Ammonia ; Carbon monoxide ; Redox reactions ; X ray photoelectron spectroscopy Subject RIV CA - Inorganic Chemistry OECD category Inorganic and nuclear chemistry R&D Projects LM2018124 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UACH-T - RVO:61388980 UT WOS 000629000400010 EID SCOPUS 85103068105 DOI 10.1039/d0cy02112a Annotation Manganese oxide-based (MnO ) catalysts have received increasing attention due to their low cost, low toxicity, and the ability to degrade organic molecules under mild conditions. In this work, several nanostructured MnObased catalysts were preparedviaredox reactions of manganese compounds in an aqueous solution and alkaline precipitation with aqueous ammonia. A wide arsenal of analytical techniques, including nitrogen physisorption (BJH and BET), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), temperature-programmed reduction (H2-TPR), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), and Raman spectroscopy were applied for their characterization. The nanostructured MnO exhibited high catalytic activity in hydrolysis of phosphate diester-based substrate bis(4-nitrophenyl)phosphate (BNPP) at 328 K. Furthermore, MnO specimens were also studied in decomposition of methanol to carbon monoxide and hydrogen as a potential alternative fuel. The results show high dependency of the materials catalytic properties on the synthesis method. It was found that the varying fractions of redox-active Mn /Mn /Mn surface sites and the high proportion of oxygen species (such as O or O ) together with the particle dispersion and morphology are important for high catalytic activity of MnO in both investigated catalytic reactions. Based on the experimental data, possible mechanisms of BNPP hydrolysis and methanol decomposition were proposed and discussed in detail. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2022 Electronic address https://doi.org/10.1039/D0CY02112A
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