Catalytic properties of Fe-based amorphous alloys with different Mo content after acid corrosion

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of Non-crystalline Solids Pub Date : 2024-10-04 DOI:10.1016/j.jnoncrysol.2024.123249

Fengchun Chen , Junhu Zhou , Chen Su , Chengquan Zhang , Hongju Zhang , Shengfeng Guo

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Abstract

A series of Fe-based amorphous alloy wires with good formation ability, good flexibility, and a large specific surface area were prepared by the melt quenching method, which can be directly used as a self-supporting electrode for the oxygen evolution reaction (OER) of water electrolysis. By controlling the content of Mo, (Fe_0.8Ni_0.2)₇₁Mo₅P₁₂C₁₀B₂ (Mo5), (Fe_0.8Ni_0.2)₇₁Mo₁₀P₁₂C₅B₂ (Mo10) and (Fe_0.8Ni_0.2)₇₁Mo₁₅P₁₀C₂B₂ (Mo15) alloy wires were prepared. It was found that Mo5 and Mo10 alloys still exhibit a fully amorphous structure, while the main body of Mo15 alloy comprises B₂Fe₃Ni₃ and Mo₆Ni₆C phases. The electrochemical results showed that Mo15 alloy had the best intrinsic catalytic activity. The OER electrocatalytic performance of Mo15 was further improved by 1 h chemical etching after soaking in 0.5 M HNO₃, which showed the overpotential was 239 mV and the Tafel slope was 40.6 mV/dec in 1 M KOH with a current density of 10 mA/cm².

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不同钼含量的铁基非晶合金在酸腐蚀后的催化特性

采用熔体淬火法制备了一系列具有良好形成能力、柔韧性和较大比表面积的铁基非晶合金丝，可直接用作水电解氧进化反应（OER）的自支撑电极。通过控制 Mo 的含量，制备了 (Fe0.8Ni0.2)71Mo5P12C10B2 (Mo5)、(Fe0.8Ni0.2)71Mo10P12C5B2 (Mo10) 和 (Fe0.8Ni0.2)71Mo15P10C2B2 (Mo15) 合金丝。研究发现，Mo5 和 Mo10 合金仍然呈现完全非晶结构，而 Mo15 合金的主体则由 B2Fe3Ni3 和 Mo6Ni6C 相组成。电化学结果表明，Mo15 合金具有最佳的内在催化活性。在 0.5 M HNO3 中浸泡 1 小时后进行化学蚀刻，Mo15 的 OER 电催化性能进一步提高，在 1 M KOH 中的过电位为 239 mV，Tafel 斜坡为 40.6 mV/dec，电流密度为 10 mA/cm2。

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来源期刊

Journal of Non-crystalline Solids 工程技术-材料科学：硅酸盐

CiteScore

6.50

自引率

11.40%

发文量

576

审稿时长

35 days

期刊介绍： The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid. In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.