Microneedle like NiCo2O4 decorated on carbonized wood for efficiently and stably acidic oxygen evolution reaction

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-09-12 DOI:10.1016/j.mseb.2025.118794

Guiqing Lei, Hewei Hou, Ze Xue, Huashuang Huo, Yuanyuan Yu, Wenyao Feng, Douyong Min

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引用次数: 0

Abstract

Oxygen evolution reaction (OER) catalyzed by abundant non-noble metal catalysts remains a key challenge for sustainable energy technologies, particularly considering the susceptibility of cobalt-based oxides to degradation in acidic media. Herein, microneedle-like NiCo₂O₄ were in situ decorated on hierarchically conductive carbonized wood (CW) scaffolds. NiCo₂O₄/CW demonstrates exceptional acidic OER performance in 0.5 M H₂SO₄, achieving 10 mA cm⁻² at a remarkably low overpotential of 270 mV and exhibiting fast kinetics (Tafel slope: 84 mV dec^-1). Furthermore, NiCo₂O₄/CW maintains its activity for 45 h under harsh acidic conditions. This superior performance is attributed to the synergistic effect of microneedle-like NiCo₂O₄ and hierarchical carbonized wood support. Ni doping enhanced the intrinsic activity of NiCo₂O₄ by modulating its electronic properties, while the hierarchical CW scaffold facilitated mass transport and gas release. This biomass-driven strategy offers a sustainable and cost-effective solution for developing durable catalysts for acidic water electrolysis.

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微针状NiCo2O4修饰在炭化木材上，进行高效稳定的酸性析氧反应

由丰富的非贵金属催化剂催化的析氧反应（OER）仍然是可持续能源技术的关键挑战，特别是考虑到钴基氧化物在酸性介质中的降解敏感性。本研究将微针状NiCo2O4原位装饰在分层导电碳化木（CW）支架上。NiCo2O4/CW在0.5 M H2SO4中表现出优异的酸性OER性能，在270 mV的过电位下达到10 mA cm - 2，并且表现出快速的动力学（Tafel斜率：84 mV dec1）。此外，NiCo2O4/CW在恶劣的酸性条件下可保持45小时的活性。这种优异的性能是由于微针状NiCo2O4和分层碳化木材支架的协同作用。Ni掺杂通过调节NiCo2O4的电子性质来增强其固有活性，而层叠的CW支架则促进了质量的传递和气体的释放。这种生物质驱动的策略为开发耐用的酸性电解水催化剂提供了可持续和经济的解决方案。

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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.