Benchmarking Hydrogen Evolving Reaction and Oxygen Evolving Reaction Electrocatalysts for Solar Water Splitting Devices
Benchmarking Hydrogen Evolving Reaction and Oxygen Evolving Reaction Electrocatalysts for Solar Water Splitting Devices
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DOI：
10.1021/ja510442p
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发表时间：
2015-04-08
影响因子：
15
通讯作者：
Jaramillo, Thomas F.
中科院分区：
文献类型：
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作者：
McCrory, Charles C. L.;Jung, Suho;Jaramillo, Thomas F.
在相同条件下，使用标准方法对电催化剂的活性和稳定性进行客观比较，对于评估现有电催化剂集成到太阳能燃料装置中的可行性以及帮助开发新的催化系统是必要的。在此，我们使用标准方案作为主要筛选，以评估18种析氢反应（HER）电催化剂和26种析氧反应（OER）电催化剂在酸性或碱性水溶液中的活性、短期（2 h）稳定性和电化学活性表面积（ECSA）。我们的主要优点是达到每几何面积10毫安厘米（-2）的电流密度所需的过电位，这是在1个太阳照射下10%效率的太阳能到燃料转换装置所期望的电流密度。还报告了每种材料的ECSA的具体活性。在HER催化剂中，有几种可以在10 mA cm（-2）下工作，并具有过电位
Objective comparisons of electrocatalyst activity and stability using standard methods under identical conditions are necessary to evaluate the viability of existing electrocatalysts for integration into solar-fuel devices as well as to help inform the development of new catalytic systems. Herein, we use a standard protocol as a primary screen for evaluating the activity, short-term (2 h) stability, and electrochemically active surface area (ECSA) of 18 electrocatalysts for the hydrogen evolution reaction (HER) and 26 electrocatalysts for the oxygen evolution reaction (OER) under conditions relevant to an integrated solar water-splitting device in aqueous acidic or alkaline solution. Our primary figure of merit is the overpotential necessary to achieve a magnitude current density of 10 mA cm(-2) per geometric area, the approximate current density expected for a 10% efficient solar-to-fuels conversion device under 1 sun illumination. The specific activity per ECSA of each material is also reported. Among HER catalysts, several could operate at 10 mA cm(-2) with overpotentials