Volume 18, Issue 2 2104323
Research Article

Oxygen Vacancy Engineering Synergistic with Surface Hydrophilicity Modification of Hollow Ru Doped CoNi-LDH Nanotube Arrays for Boosting Hydrogen Evolution

Qianqian Li

Qianqian Li

School of Materials Science and Engineering, Anhui University, Hefei, 230601 P. R. China

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Fangzhi Huang

Fangzhi Huang

School of Chemistry and Chemical Engineering, Anhui University, Hefei, 230601 P. R. China

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Shikuo Li

Shikuo Li

School of Materials Science and Engineering, Anhui University, Hefei, 230601 P. R. China

Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei, 230601 P. R. China

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Hui Zhang

Corresponding Author

Hui Zhang

School of Materials Science and Engineering, Anhui University, Hefei, 230601 P. R. China

Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei, 230601 P. R. China

E-mail: [email protected]; [email protected]

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Xin-Yao Yu

Corresponding Author

Xin-Yao Yu

Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei, 230601 P. R. China

Insititute of Physical Science and Information Technology, Anhui University, Hefei, 230601 P. R. China

E-mail: [email protected]; [email protected]

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First published: 05 November 2021
Citations: 58

Abstract

With the development of clean hydrogen energy, the cost effective and high-performance hydrogen evolution reaction (HER) electrocatalysts are urgently required. Herein, a green, facile, and time-efficient Ru doping synergistic with air-plasma treatment strategy is reported to boost the HER performance of CoNi-layered double hydroxide (LDH) nanotube arrays (NTAs) derived from zeolitic imidazolate framework nanorods. The Ru doping and air-plasma treatment not only regulate the oxygen vacancy to optimize the electron structure but also increase the surface roughness to improve the hydrophilicity and hydrogen spillover efficiency. Therefore, the air plasma treated Ru doped CoNi-LDH (P-Ru-CoNi-LDH) nanotube arrays display superior HER performance with an overpotential of 29 mV at a current density of 10 mA cm−2. Furthermore, by assembling P-Ru-CoNi-LDH as both cathode and anode for two-electrode urea-assisted water electrolysis, a small cell voltage of 1.36 V is needed at 10 mA cm−2 and can last for 100 h without any obvious activity attenuation that showing outstanding durability. In general, the P-Ru-CoNi-LDH can improve the HER performance from intrinsic electronic structure regulation cooperated with extrinsic surface wettability modification. These findings provide an effective intrinsic and extrinsic synergistic effect avenue to develop high performance HER electrocatalysts, which is potential to be applied to other research fields.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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