Phase-dependent electrocatalytic activities of Pt-anchored rutile, anatase and mixed anatase-rutile TiO2 nano-composites for methanol oxidation in alkali

Malay Chakraborty, Kamal Kanti Bera, Manas Mandal, Apurba Ray, Sachindranath Das, Trilochan Bhunia, Arup Gayen, Atanu Panda, Hyung Ho Park, Swapan Kumar Bhattacharya

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7 Citations (Scopus)

Abstract

Anatase, rutile and mixed anatase-rutile TiO2 are synthesized using a single pot sol-gel technique followed by variation of calcination temperature. The Pt decorated synthesized catalysts have been characterized by diffraction, spectroscopic and microscopic analyses. The cyclic voltammetry (CV) study reveals the increase of forward peak current density of methanol oxidation in alkali on Pt-anchored mixed-phase TiO2 (Pt/ARTiO2) (324.8 A g−1) by 4 and 2.5 times than that on Pt-containing rutile and anatase phases. The charge transfer conductance of the former electrode (1/184 Ω−1) is 5.7 and 8.7 times greater compare to that of the laters. The phase-dependent electrocatalytic activity of the electrodes and large retention (95%) of maximum peak current density at 500th CV cycle for the best electrode, are analyzed by different product selectivity of the electrodes. Pt/ARTiO2 is found to be the best current provider and reliable as it accelerates the formation of formate instead of carbonate.

Original languageEnglish
Article number106903
JournalSolid State Sciences
Volume129
DOIs
Publication statusPublished - 2022 Jul

Bibliographical note

Publisher Copyright:
© 2022 Elsevier Masson SAS

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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