Cheng Ningyan, Liu Qian, Tian Jingqi, Xue Yurui, Asiri Abdullah M, Jiang Hongfang, He Yuquan, Sun Xuping
State Key Lab of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China.
Chem Commun (Camb). 2015 Jan 31;51(9):1616-9. doi: 10.1039/c4cc07120d.
The efficiency of many energy storage technologies is limited by the sluggish kinetics of the oxygen evolution reaction (OER) and it is thus of great importance to develop highly active OER electrocatalysts made from earth-abundant elements. In this communication, we report a novel metal-free oxygen evolution electrode with high catalytic activity and stability through simple acidic oxidation of commercially available carbon cloth (CC). The resulting acidically oxidized CC exhibits an overpotential of 328 mV and a Tafel slope of 82 mV dec(-1) with 100% Faradaic efficiency. This electrode needs an overpotential of 477 mV to afford a current density of 10 mA cm(-2) and maintains its catalytic activity for at least 24,000 s. It offers us a low-cost flexible electrocatalytic electrode for device integration toward water splitting and rechargeable metal-air battery applications.
许多储能技术的效率受到析氧反应（OER）缓慢动力学的限制，因此开发由储量丰富的元素制成的高活性OER电催化剂具有重要意义。在本通讯中，我们报道了一种通过对市售碳布（CC）进行简单酸性氧化而制备的具有高催化活性和稳定性的新型无金属析氧电极。所得的酸性氧化CC表现出328 mV的过电位和82 mV dec⁻¹的塔菲尔斜率，法拉第效率为100%。该电极需要477 mV的过电位才能提供10 mA cm⁻²的电流密度，并保持其催化活性至少24000秒。它为我们提供了一种低成本的柔性电催化电极，用于集成到水分解和可充电金属空气电池应用的器件中。
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