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Issue 20, 2020
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Pt nanoparticle-decorated two-dimensional oxygen-deficient TiO2 nanosheets as an efficient and stable electrocatalyst for the hydrogen evolution reaction

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Abstract

Developing novel hydrogen evolution reaction (HER) catalysts with high activity, high stability and low cost is of great importance for the ever-broader applications of hydrogen energy. Among the conventionally used platinum-based heterogeneous catalysts, the high consumption and low utilization efficiency of precious platinum are the most crucial issues. Herein we present a facile approach to prepare an effective HER catalyst with platinum nanoparticles dispersed on oxygen-deficient TiO2−x nanosheets (NSs). The fabricated Pt–TiO2−x NS electrocatalyst shows an overpotential of 35 mV at 10 mA cm−2 for the HER in 0.5 M H2SO4, which is highly comparable to that of commercial Pt/C (34 mV). More attractively, the Pt–TiO2−x NS electrocatalyst largely enhanced the mass activity (MA) of Pt and electrochemical stability compared to commercial Pt/C. The excellent HER performance of Pt–TiO2−x NSs is attributed to the synergetic effect between highly dispersed Pt species and TiO2−x NSs with oxygen vacancies, which enhances both electrocatalytic activity and durability over a wide pH range. This strategy can provide insights into constructing highly efficient catalysts and their support for different energy-related applications.

Graphical abstract: Pt nanoparticle-decorated two-dimensional oxygen-deficient TiO2 nanosheets as an efficient and stable electrocatalyst for the hydrogen evolution reaction

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Supplementary files

Article information


Submitted
16 Mar 2020
Accepted
20 Apr 2020
First published
21 Apr 2020

Nanoscale, 2020,12, 11055-11062
Article type
Paper

Pt nanoparticle-decorated two-dimensional oxygen-deficient TiO2 nanosheets as an efficient and stable electrocatalyst for the hydrogen evolution reaction

K. M. Naik, E. Higuchi and H. Inoue, Nanoscale, 2020, 12, 11055
DOI: 10.1039/D0NR02092C

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