Atomic-level structural engineering of La-doped CoMoP composite for enhanced overall water splitting

IF 3.2 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Journal of Solid State Chemistry Pub Date : 2024-10-29 DOI:10.1016/j.jssc.2024.125083
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Abstract

A series of La-doped CoMoP composites were fabricated through an in-situ phosphorization strategy with La–CoMo layered double hydroxide (LDH) as precursors. The homogenous dispersion of metal ions within the LDH structure facilitated the creation of a uniformly atomic-level La-doped CoMoP composite. Among these, the 5 % La-doped CoMoP exhibited the best performance, requiring only 41 mV overpotential for hydrogen evolution reaction (HER) and 303 mV for oxygen evolution reaction (OER) to reach a current density of 10 mA cm−2. For overall water splitting, it achieved a current density of 10 mA cm−2 at a cell voltage of just 1.61 V and maintained a stable performance over 24 h. The modulation effect of rare-earth elements, combined with the synergistic interactions among transition metal ions, contributes to its excellent bifunctional electrocatalytic performance.

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掺杂 La 的 CoMoP 复合材料的原子级结构工程可提高整体水分离效果
以 La-CoMo 层状双氢氧化物(LDH)为前驱体,通过原位磷化策略制备了一系列掺杂 La 的 CoMoP 复合材料。金属离子在 LDH 结构中的均匀分散促进了原子级 La 掺杂 CoMoP 复合材料的产生。其中,掺杂 5% La 的 CoMoP 表现出最佳性能,氢进化反应(HER)和氧进化反应(OER)分别只需要 41 mV 和 303 mV 的过电位就能达到 10 mA cm-2 的电流密度。稀土元素的调制效应与过渡金属离子之间的协同作用相结合,造就了其卓越的双功能电催化性能。
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来源期刊
Journal of Solid State Chemistry
Journal of Solid State Chemistry 化学-无机化学与核化学
CiteScore
6.00
自引率
9.10%
发文量
848
审稿时长
25 days
期刊介绍: Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.
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