Photocatalytic activity of LiMgPO4 in the hydroquinone decomposition and related surface phenomena

• Published in: Reaction kinetics, mechanisms and catalysis mechanisms and catalysis, 2020-04, Vol.129 (2), p.1061-1076
• Main Authors: Kalinkin, M. O., Yanchenko, M. Yu, Buldakova, L. Yu, Dmitriev, A. V., Zhuravlev, N. A., Kellerman, D. G.
• Format: Article
• Language: English
• Subjects: Catalysis; Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Physical Chemistry
• ISSN: 1878-5190; 1878-5204
• DOI: 10.1007/s11144-020-01754-3

We report a study which exhibits for the first time the catalytic activity of LiMgPO 4 in the reaction of hydroquinone oxidation. The samples were synthesized by solid state reaction, glycerol-nitrate method and ultrasonic spray pyrolysis. It was proved that LiMgPO 4 makes the hydroquinone decomposition possible in the absence of irradiation and accelerates it under the action of light. It was determined that the lager is the specific surface area of the catalyst, the higher is the reaction rate constant. The high catalytic activity of LiMgPO 4 in the oxidation reaction was explained by the existence of defects on the LiMgPO 4 surface able to adsorb ions, radicals, etc. The UV–vis spectra clearly indicated the existence of defects. The results of voltammetric and NMR studies confirmed that the defective surface of LiMgPO 4 easily adsorbs molecular and ionic groups of different nature formed during sorption and electrolysis of water.