Issue 23, 2022

An interconnected-graphene enveloped titanium dioxide flower as a robust support for proton exchange membrane fuel cells

Abstract

Support corrosion is a traditional intractable problem for oxygen electrodes of fuel cells, so developing anti-corrosion supports is highly desirable. Herein, we fabricate a three-dimensional (3D) interconnected-graphene enveloped titanium dioxide flower (TiO2@RGO) as a robust support for the oxygen reduction reaction (ORR). Benefiting from the unique 3D architecture, the TiO2@RGO composite possesses both a large surface area of 174 m2 g−1 and a superior electrical conductivity of 0.19 S cm−1, enabling an electron highway for efficient simultaneous mass transfer of reactants. After loading Pt nanoparticles, the Pt–TiO2@RGO catalyst exhibits a similar catalytic activity to the commercial Pt/C catalyst, while superior stability under the accelerated degradation protocols for both catalysts (0.6–1.0VRHE) and supports (1.0–1.5VRHE), due to the strong metal–support interaction (SMSI) of Pt nanoparticles and the TiO2@RGO composite support. The PEMFC with the Pt–TiO2@RGO cathode delivers a peak power density of 901 mW cm−2, which is comparable to that with a Pt/C cathode. This work proposes a new strategy for designing robust catalyst supports for PEMFCs.

Graphical abstract: An interconnected-graphene enveloped titanium dioxide flower as a robust support for proton exchange membrane fuel cells

Supplementary files

Article information

Article type
Paper
Submitted
19 Apr 2022
Accepted
21 May 2022
First published
23 May 2022

Dalton Trans., 2022,51, 9167-9174

An interconnected-graphene enveloped titanium dioxide flower as a robust support for proton exchange membrane fuel cells

J. Gao, Z. Sun, J. Wang, C. Fan, X. Cui, J. Liu and L. Jiang, Dalton Trans., 2022, 51, 9167 DOI: 10.1039/D2DT01219G

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