Preparation of Ru-doped TiO2 nanotube arrays through anodizing TiRu alloys for bifunctional HER/OER electrocatalysts

Yuejiao Liu; Xixin Wang; Mengyao Yang; Ying Li; Yue Xiao; Jianling Zhao

doi:10.1039/D3NR03831A

Preparation of Ru-doped TiO₂ nanotube arrays through anodizing TiRu alloys for bifunctional HER/OER electrocatalysts†

Yuejiao Liu,^a Xixin Wang,^a Mengyao Yang,^a Ying Li,^a Yue Xiao^a and Jianling Zhao

*^a

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* Corresponding authors

^a School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
E-mail: hebutzhaoj@126.com
Tel: +86-22-60204525

Abstract

In this research, Ru-doped TiO₂ nanotube arrays (Ru-TNTA) were prepared by anodizing TiRu alloys, and the effects of annealing temperature, Ru content and test temperature on their performances for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) were investigated. The results show that the unannealed Ru-TNTA (a-Ru-TNTA) exhibits superior activity for the HER, and the Ru-TNTA annealed at 450 °C (c-Ru-TNTA) shows excellent activity for the OER. The Ru content of TiRu impacts the electrochemically active surface area (ECSA) and the charge transfer resistance (R_ct) significantly. When the Ru content of Ru-TNTA is 6%, its performance is optimal. Moreover, the electrocatalytic activity of Ru-TNTA improves with increasing test temperature, and the overpotentials of a-Ru-TNTA and c-Ru-TNTA at 80 °C are 19 mV and 227 mV (10 mA cm⁻²), respectively. Ru-TNTA exhibits excellent electrocatalytic performance for water splitting and good stability, which provides a new idea for the preparation of advanced bifunctional electrocatalysts for water splitting.

This article is part of the themed collection: 2024 Lunar New Year Collection

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Article information

DOI: https://doi.org/10.1039/D3NR03831A
Article type: Paper
Submitted: 01 Sext 2023
Accepted: 12 Oct 2023
First published: 31 Oct 2023

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Nanoscale, 2023,15, 17936-17945

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Preparation of Ru-doped TiO₂ nanotube arrays through anodizing TiRu alloys for bifunctional HER/OER electrocatalysts

Y. Liu, X. Wang, M. Yang, Y. Li, Y. Xiao and J. Zhao, Nanoscale, 2023, 15, 17936 DOI: 10.1039/D3NR03831A

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