Abstract: It was found that addition of vanadium had a catalytic effect on the interaction of nanocrystalline MgO aerogels with halocarbons, accelerating the formation of the active sites on the surface of the nanoparticles. The electron-acceptor sites on the surface of initial samples of MgO and VOx/MgO were not observed. Their concentration gradually increased during the induction period, reaching a clearly defined maximum in the active state when the rapid topochemical destructive sorption reaction occurred. A good correlation was observed between the rate of the halocarbon destructive sorption and the concentration of weak electron-acceptor sites characterized using anthracene or perylene as spin probes. The concentration of electron-donor sites decreased during reaction with CF2Cl2 and did not correlate with reactivity. These results clearly demonstrate that weak electron-acceptor sites are accumulated on the MgO surface during the induction period of its reaction with CF2Cl2.

Cite: Shuvarakova E.I. , Bedilo A.F. , Mishakov I.V. , Vedyagin A.A.
Role of Electron-Acceptor Sites during Destructive Sorption of CF2Cl2 over MgO and VOx/MgO Aerogels
In compilation EuropaCat XII. Catalysis: Balancing the use of fossil and renewable resources. XII European Congress on Catalysis, Kazan (Russia), 30 August - 4 September, 2015 : Book of Abstracts. – BIC SB RAS., 2015. – C.1921-1922. – ISBN 978-5-906376-10-7.

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