Cobalt hydroxide has been emerging as a promising catalyst for the electrocatalytic oxidation reactions, including the oxygen evolution reaction (OER) and glucose oxidation reaction (GOR). Herein, we prepared cobalt hydroxide nanoparticles (CoHP) and cobalt hydroxide nanosheets (CoHS) on nickel foam. In the electrocatalytic OER, CoHS shows an overpotential of 306 mV at a current density of 10 mA·cm⁻². This is enhanced as compared with that of CoHP (367 mV at 10 mA·cm⁻²). In addition, CoHS also exhibits an improved performance in the electrocatalytic GOR. The improved electrocatalytic performance of CoHS could be due to the higher ability of the two-dimensional nanosheets on CoHS in electron transfer. These results are useful for fabricating efficient catalysts for electrocatalytic oxidation reactions.

氢氧化钴已成为电催化氧化反应的有希望的催化剂，包括氧释放反应（OER）和葡萄糖氧化反应（GOR）。本文中，我们在镍泡沫上制备了氢氧化钴纳米颗粒（CoHP）和氢氧化钴纳米片（CoHS）。在电催化OER中，CoHS在电流密度为10 mA·cm ^-2时显示出306 mV的过电势。与CoHP相比（10 mA·cm ^-2时为367 mV）。此外，CoHS在电催化GOR中也表现出改进的性能。CoHS的改善的电催化性能可能是由于二维纳米片材在CoHS上具有更高的电子转移能力。这些结果对于制造用于电催化氧化反应的有效催化剂是有用的。