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首页> 外文期刊>ACS applied materials & interfaces >General Strategy for the Synthesis of Transition Metal Phosphide Films for Electrocatalytic Hydrogen and Oxygen Evolution
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General Strategy for the Synthesis of Transition Metal Phosphide Films for Electrocatalytic Hydrogen and Oxygen Evolution

机译：合成用于电催化氢和氧逸出的过渡金属磷化物膜的一般策略

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摘要

Transition metal phosphides recently have been identified as promising Earth-abundant electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). Here, we present a general and scalable strategy for the synthesis of transition metal phosphide electrodes based on the reaction of commercially available metal foils (Fe, Co, Ni, Cu, and NiFe) with various organophosphine reagents. The resulting phosphide electrodes were found to exhibit excellent electrocatalytic HER and OER performance. The most active electrodes required over potentials of only 128 mV for the HER in acid (Ni2P), 183 mV for the HER in base (Ni2P), and 277 mV for the OER in base (NiFeP) to produce operationally relevant current densities of 10 mA cm(-2). Such HER and OER performance compares favorably with samples prepared using significantly more elaborate and costly procedures. Furthermore, we demonstrate that the approach can also be utilized to obtain highly active and conformal metal phosphide coatings on photocathode materials, such as highly doped Si, that are relevant to solar fuels production.
机译：过渡金属磷化物最近已被确定为氢释放反应（HER）和氧释放反应（OER）的有前途的地球上丰富的电催化剂。在这里，我们提出了一种通用的，可扩展的策略，用于基于市售金属箔（Fe，Co，Ni，Cu和NiFe）与各种有机膦试剂的反应合成过渡金属磷化物电极。发现所得的磷化物电极表现出优异的电催化HER和OER性能。活性最高的电极在酸（Ni2P）中的HER的电势仅需128 mV，在碱（Ni2P）中的HER的电势在183 mV和在碱金属（NiFeP）的OER的电势需要277 mV以上mA cm（-2）。这样的HER和OER性能与使用明显更复杂和昂贵的程序制备的样品相比具有优势。此外，我们证明了该方法还可用于在光阴极材料（例如高掺杂Si）上获得与太阳能燃料生产相关的高活性和共形的金属磷化物涂层。

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