Synthesis, morphology and electrochemical properties of spherulite titania nanocrystals

Vadim I. Popkov, Anastasia K. Bachina, Albina A. Valeeva, Artem A. Lobinsky, Evgeny Y. Gerasimov, Andrey A. Rempel

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

A new approach to hydrothermally synthesize nanocrystalline titanium dioxide with a rutile structure and spherulite-like morphology from titanyl citrate is described herein. It was found that titanium dioxide formed as a result of titanyl citrate thermolysis with the following products: rutile nanocrystals, itaconic acid, and carbon dioxide. Rutile nanocrystals were rod-shaped and oriented in the (101) crystallographic direction. The position of the rutile nanocrystals in the spherulites and pores between the nanocrystals lead to high electrocatalytic activity for the oxygen evolution reaction in alkaline aqueous solutions. The process is characterized by a Tafel slope of 49 mV/dec.

Original languageEnglish
Pages (from-to)24483-24487
Number of pages5
JournalCeramics International
Volume46
Issue number15
Early online date23 Jun 2020
DOIs
Publication statusPublished - 15 Oct 2020

Keywords

  • Electrocatalysis
  • Hydrothermal synthesis
  • Rutile
  • Spherulites
  • Titania

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