Constructing self-supported anode and cathode by monolithic Fe2B for highly efficient water splitting

IF 2.8 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER

Physica B-condensed Matter Pub Date : 2025-09-15 DOI:10.1016/j.physb.2025.417812

Shuai Wan , Lihong Bao , Jiayu Xiao , Jiaru He , Xinyu Gao , Hao Wang , Yongjun Cao , Ruguang Ma

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引用次数: 0

Abstract

High efficient bifunctional hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) electrocatalysts have been synthesized through the ultralow Pt cluster and amorphous CoS constructing with self-supported Fe₂B thin film (Fe₂B-TF), respectively. As a result, the Pt/Fe₂B exhibit a low overpotential of 78 mV for HER and CoS/Fe₂B show a low overpotential of 243 mV for OER at 10 mA cm⁻² in alkaline media. Moreover, a two-electrode electrolyzer of CoS/Fe₂B||Pt/Fe₂B-06 requires the cell voltage of 2.0 V to reach the high current density of 414 mA cm⁻², which is about 2.3 times larger than that of commercial RuO₂||Pt/C. Meanwhile, it keeps a remarkable durability, maintaining a high current density of 100 mA cm⁻² for more than 30 h. Therefore, the favorable coupling of Fe₂B-TF with Pt cluster and amorphous CoS effectively improve the electrochemical water splitting activity, making it has potential application in industrial alkaline water electrolysis.

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用单片Fe2B构建自支撑阳极和阴极，实现高效水分解

采用超低铂簇和以自支撑Fe2B薄膜（Fe2B- tf）构建无定形co，分别合成了高效的析氢反应（HER）和析氧反应（OER）电催化剂。结果表明，在碱性介质中，在10 mA cm−2条件下，Pt/Fe2B的HER过电位为78 mV， CoS/Fe2B的OER过电位为243 mV。此外，CoS/Fe2B||Pt/Fe2B-06双电极电解槽需要2.0 V的电池电压才能达到414 mA cm−2的高电流密度，约为商用RuO2||Pt/C的2.3倍。同时，它保持了显著的耐久性，维持100 mA cm−2的高电流密度超过30 h。因此，fe2o - tf与Pt簇和无定形CoS的良好耦合有效地提高了电化学水分解活性，使其在工业碱性水电解中具有潜在的应用前景。

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来源期刊

Physica B-condensed Matter 物理-物理：凝聚态物理

CiteScore

4.90

自引率

7.10%

发文量

703

审稿时长

44 days

期刊介绍： Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work. Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas: -Magnetism -Materials physics -Nanostructures and nanomaterials -Optics and optical materials -Quantum materials -Semiconductors -Strongly correlated systems -Superconductivity -Surfaces and interfaces