Synthesis and characterization of novel Ti doped hexagonal mesoporous silica catalyst for nonenzymatic hydrogen peroxide oxidation

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Düzenli D., Sahin Ö., Kazıcı H. Ç., Aktaş N., Kivrak H.

Microporous and Mesoporous Materials, vol.257, pp.92-98, 2018 (SCI-Expanded)

• Publication Type: Article / Article
• Volume: 257
• Publication Date: 2018
• Doi Number: 10.1016/j.micromeso.2017.08.030
• Journal Name: Microporous and Mesoporous Materials
• Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
• Page Numbers: pp.92-98
• Eskisehir Osmangazi University Affiliated: No

Abstract

© 2017 Elsevier Inc.A new electrocatalyst, Ti-HMS was successfully synthesized by sol-gel method employing Ti source tetrabutyl orthotitanate (TBOT) and silica source tetraethyl orthosilicate (TEOS, 99% purity). Ti-HMS catalysts were prepared at varying Ti:Si ratios by employing sol-gel method. Physicochemical properties of these nanoparticles were characterized and confirmed by BET, TG-DTA, XPS, and XRD. Electrochemical properties of Ti-HMS catalysts prepared at varying Ti:Si ratios were examined by cyclic voltammetry (CV) and chronoamperometry (CA) for determination of the oxidation and reduction activity of H2O2. It was observed that the Ti-HMS (Ti:Si = 0.02) electrode exhibits significant oxidation and reduction of H2O2 at applied potentials of 0.65 V and −0.30 V with the addition of H2O2, respectively. The excellent electrocatalytic response to H2O2 is mainly attributed to varying electronic properties with the incorporation of Ti to HMS.