Volume 21, Issue 24 2409331
Research Article

In Situ Unravelling NiOOH Species on Flower-Like NiFeCo LDH/Nb2CTx for Ameliorated Solar-Powered Bifunctional Electrocatalytic Benzyl Alcohol Oxidation Coupled with Hydrogen Evolution

Jian Yiing Loh

Jian Yiing Loh

School of Energy and Chemical Engineering, Xiamen University Malaysia, Selangor Darul Ehsan, Sepang, 43900 Malaysia

Center of Excellence for NaNo Energy & Catalysis Technology (CONNECT), Xiamen University Malaysia, Selangor Darul Ehsan, Sepang, 43900 Malaysia

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Feng Ming Yap

Feng Ming Yap

School of Energy and Chemical Engineering, Xiamen University Malaysia, Selangor Darul Ehsan, Sepang, 43900 Malaysia

Center of Excellence for NaNo Energy & Catalysis Technology (CONNECT), Xiamen University Malaysia, Selangor Darul Ehsan, Sepang, 43900 Malaysia

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Tan Ji Siang

Tan Ji Siang

School of Energy and Chemical Engineering, Xiamen University Malaysia, Selangor Darul Ehsan, Sepang, 43900 Malaysia

Center of Excellence for NaNo Energy & Catalysis Technology (CONNECT), Xiamen University Malaysia, Selangor Darul Ehsan, Sepang, 43900 Malaysia

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Xianhai Zeng

Xianhai Zeng

College of Energy, State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen, 361102 China

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Wee-Jun Ong

Corresponding Author

Wee-Jun Ong

School of Energy and Chemical Engineering, Xiamen University Malaysia, Selangor Darul Ehsan, Sepang, 43900 Malaysia

Center of Excellence for NaNo Energy & Catalysis Technology (CONNECT), Xiamen University Malaysia, Selangor Darul Ehsan, Sepang, 43900 Malaysia

State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 China

Gulei Innovation Institute, Xiamen University, Zhangzhou, 363200 China

Shenzhen Research Institute of Xiamen University, Shenzhen, 518057 China

Department of Chemical and Biological Engineering, College of Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841 Republic of Korea

E-mail: [email protected]

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First published: 11 December 2024
Citations: 3

Abstract

Developing bifunctional electrocatalysts from earth-abundant first-row transition metals for large-scale hydrogen production through water electrolysis is both promising and challenging. This study presents a ternary layered double hydroxide (LDH) as a bifunctional electrocatalyst for the hydrogen evolution reaction (HER) and benzyl alcohol oxidation (BAOR). The synergy between 2D NiFeCo LDH and non-Ti-based Nb2CTx MXene enhances electrochemical performance. The electrocatalyst achieves excellent results with a low potential of 1.5 V versus RHE at 100 mA cm⁻2 for BAOR, an overpotential of 320 mV at 50 mA cm⁻2 for HER, and stability over 100 h. A solar cell-powered HER||BAOR system shows faradaic efficiency of ≈73.92% for benzaldehyde production and solar-to-hydrogen (STH) efficiency of ≈39.67%. In situ Raman analysis identifies the oxyhydroxide group as the real catalytic active site during BAOR. These findings offer valuable insights for linking fundamental research with technological innovation to address global challenges.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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