Issue 20, 2023

Charge-enriched RuO2 nanoparticles decorating TiO2 with Ti defects to promote oxygen evolution reaction in acidic media

Abstract

Dispersing precious metal oxide nanoparticles on a support is a promising catalyst modification strategy for the oxygen evolution reaction in acidic media, but the rational design of the heterointerface remains challenging. Herein, electron-rich ruthenium dioxide dispersed on the metal-deficient TiO2 is constructed as an efficient electrocatalyst for oxygen evolution. The combination with defective support triggers the charge transfer from the support to RuO2, which optimizes the adsorption/desorption of oxo-intermediates and thus improves the kinetics of the OER reaction. Moreover, the large electron filling in the support, as an auxiliary, accelerates the deprotonation of oxo-intermediates during the acidic OER. As a result, the improved d-TiO2/RuO2 showed excellent OER activity, with an overpotential of 226 mV @10 mA cm−2 in 0.5 M H2SO4, which was superior to that of commercial RuO2. This study provides an ideal defective support for unique heterojunction catalysts and highlights the development of noble metal catalysts with low cost.

Graphical abstract: Charge-enriched RuO2 nanoparticles decorating TiO2 with Ti defects to promote oxygen evolution reaction in acidic media

Supplementary files

Article information

Article type
Research Article
Submitted
28 Jun 2023
Accepted
14 Aug 2023
First published
23 Aug 2023

Inorg. Chem. Front., 2023,10, 6015-6022

Charge-enriched RuO2 nanoparticles decorating TiO2 with Ti defects to promote oxygen evolution reaction in acidic media

Y. Wang, Y. Hao, L. Wang, C. Li, J. Ren, Y. Sun, F. Hu, L. Li and S. Peng, Inorg. Chem. Front., 2023, 10, 6015 DOI: 10.1039/D3QI01203D

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