Partial sulfurization enabled SO42- decorated NiFe2O4 for enhanced electrocatalytic urea oxidation

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-03-18 DOI:10.1016/j.mseb.2025.118228

Jiang Liu, Xiulin Wu, Yinqiang Shu, Xinliang Yan, Xiujuan Sun

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Abstract

Urea-assisted water splitting for hydrogen production is an emerging technology, but developing efficient urea oxidation reaction (UOR) electrocatalysts remains challenging. Hence, the nonmetallic anionic group SO₄^2- decorated NiFe₂O₄ (S_x-NiFe₂O₄) catalyst is cleverly designed via a facile one-pot co-precipitation process followed by a sulfurization strategy. The decoration with SO₄^2- not only increased the high-valent Ni content and active sites in the catalyst but also significantly improved its hydrophilicity and stability. With the optimal sulfurization amount, S_0.5-NiFe₂O₄ only 1.48 V is sufficient to achieve 100 mA cm⁻² and staggering mass activity of 5.6 A cm⁻² mg⁻¹ at 1.6 V. Strikingly, the overall urea electrolyzer with S_0.5-NiFe₂O₄ anode only requires 1.59 V to drive a current density of 50 mA cm⁻² and maintains stably for 100h at a current density of 10 mA cm⁻². Besides, this urea overall splitting system can be powered by a 1.5 V voltaic battery. This study provides a strategy for designing UOR catalysts with high catalytic performance from the aspect of taking advantage of nonmetallic anionic groups.

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.