Laser Synthesis of PtMo Single-Atom Alloy Electrode for Ultralow Voltage Hydrogen Generation,Advanced Materials

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Laser Synthesis of PtMo Single-Atom Alloy Electrode for Ultralow Voltage Hydrogen Generation
Advanced Materials ( IF 27.4 ) Pub Date : 2023-11-06 , DOI: 10.1002/adma.202305375
Haifeng Yuan ₁ , Di Jiang ₁ , Zhimeng Li ₁ , Xiaoyu Liu _{1,

2} , Zhenfei Tang ₁ , Xuzihan Zhang _{1,

3} , Lili Zhao ₁ , Man Huang ₁ , Hong Liu _{1,

2} , Kepeng Song ₄ , Weijia Zhou ₁

Affiliation

Maximizing atom-utilization efficiency and high current stability are crucial for the platinum (Pt)-based electrocatalysts for hydrogen evolution reaction (HER). Herein, the Pt single-atom anchored molybdenum (Mo) foil (Pt-SA/Mo-L) as a single-atom alloy electrode is synthesized by the laser ablation strategy. The local thermal effect with fast rising–cooling rate of laser can achieve the single-atom distribution of the precious metals (e.g., Pt, Rh, Ir, and Ru) onto the Mo foil. The synthesized self-standing Pt-SA/Mo-L electrode exhibits splendid catalytic activity (31 mV at 10 mA cm⁻²) and high-current-density stability (≈850 mA cm⁻² for 50 h) for HER in acidic media. The strong coordination of Pt-Mo bonding in Pt-SA/Mo-L is critical for the efficient and stable HER. In addition, the ultralow electrolytic voltage of 0.598 V to afford the current density of 50 mA cm⁻² is realized by utilization of the anodic molybdenum oxidation instead of the oxygen evolution reaction (OER). Here a universal synthetic strategy of single-atom alloys (PtMo, RhMo, IrMo, and RuMo) as self-standing electrodes is provided for ultralow voltage and membrane-free hydrogen production.

中文翻译：

激光合成PtMo单原子合金电极用于超低压制氢

最大化原子利用效率和高电流稳定性对于析氢反应（HER）的铂（Pt）基电催化剂至关重要。在此，通过激光烧蚀策略合成了作为单原子合金电极的Pt单原子锚定钼（Mo）箔（Pt-SA/Mo-L）。激光快速上升冷却速率的局部热效应可以实现贵金属（例如Pt、Rh、Ir和Ru）在Mo箔上的单原子分布。合成的自立式 Pt-SA/Mo-L 电极在酸性介质中对 HER 表现出出色的催化活性（10 mA cm ^-2时为 31 mV）和高电流密度稳定性（约 850 mA cm ^-2 50 h）。 Pt-SA/Mo-L 中 Pt-Mo 键合的强配位对于高效稳定的 HER 至关重要。此外，通过利用阳极钼氧化而不是析氧反应（OER）实现了0.598 V的超低电解电压以提供50 mA cm ^-2的电流密度。这里提供了单原子合金（PtMo、RhMo、IrMo 和 RuMo）作为自支撑电极的通用合成策略，用于超低电压和无膜制氢。

更新日期：2023-11-06

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