Oxygen vacancies modulated Co3O4 toward highly efficient electrooxidation of 5-hydroxymethylfurfural

Guangjian Song; Liuhua Mu; Panzhe Qiao; Li Yang; Min Zhang; Fangfang Dai; Lixiong Dai; Hao Wu; Zhonggui Gao; Guosheng Shi; Sanzhao Song

Results in Engineering (Dec 2023)

Oxygen vacancies modulated Co3O4 toward highly efficient electrooxidation of 5-hydroxymethylfurfural

Guangjian Song,
Liuhua Mu,
Panzhe Qiao,
Li Yang,
Min Zhang,
Fangfang Dai,
Lixiong Dai,
Hao Wu,
Zhonggui Gao,
Guosheng Shi,
Sanzhao Song

Affiliations

Guangjian Song: College of Physics and Technology, Guangxi Normal University, Guilin, 541004, China; Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China
Liuhua Mu: Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China; School of Physical Science, University of Chinese Academy of Sciences, Beijing 100049, China
Panzhe Qiao: Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204 China
Li Yang: College of Physics and Technology, Guangxi Normal University, Guilin, 541004, China; Corresponding author.
Min Zhang: Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China
Fangfang Dai: Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China
Lixiong Dai: Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China
Hao Wu: Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China
Zhonggui Gao: College of Physics and Technology, Guangxi Normal University, Guilin, 541004, China; Corresponding author.
Guosheng Shi: Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China; Shanghai Applied Radiation Institute, Shanghai University, Shanghai 201800, China
Sanzhao Song: Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China; Corresponding author.

Journal volume & issue: Vol. 20
p. 101606

Abstract

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Electrochemical oxidation of 5-hydroxymethylfurfural (HMF) has emerged as a promising method to produce highly valuable chemicals. Co-based electrocatalysts with oxygen vacancies are one of the most promising candidates. However, the relationship between their electrocatalytic behavior and the vacancy concentration is still ambiguous. In this work, the diverse oxygen vacancy contents of Co3O4 were realized via a simple adsorption-pyrolysis method and confirmed by X-ray diffraction, Raman, transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray absorption spectroscopy, respectively. It was found that the Co3O4 with proper oxygen vacancies prepared at optimized conditions exhibits a superior catalytic activity for HMF oxidation reaction (HMFOR) in 1.0 M KOH with 50 mM HMF electrolyte (with the potential of 1.35 V vs. RHE at 10 mA cm−2). Correlational characterizations and density functional theory calculations demonstrate that appropriate oxygen vacancies can promote HMF electrooxidation performance, whereas excessive oxygen vacancies can hinder electron transport and result in a significant decline in HMF electrooxidation performance. This study reveals the significance of appropriate oxygen vacancies in catalytic oxidation activity and provides important insights into the role of oxygen vacancies in catalytic oxidation reactions for the synthesis of defective material.

Published in Results in Engineering

ISSN: 2590-1230 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology
Website: https://www.journals.elsevier.com/results-in-engineering

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