Porous cobalt oxide nanoplates enriched with oxygen vacancies are synthesized using a ligand-assisted polyol reduction method. This method enables large-scale synthesis that offers superior uniformity, solution dispersity and controllable concentration of oxygen vacancies on surface. The large surface area of porous cobalt oxide nanoplates together with enriched oxygen vacancies provide more active sites, which promote faster exchange of intermediates and more efficient electron transfer. The as prepared cobalt oxide nanoplates manifest oxygen evolution reaction (OER) overpotential as low as 306 mV at 10 mA/cm² in 1 M KOH, which is superior to the values of most reported Co-based electrocatalysts.

使用配体辅助的多元醇还原法合成了富集了氧空位的多孔氧化钴纳米板。此方法可进行大规模合成，从而提供优异的均匀性，溶液分散性和表面上的氧空位浓度可控。多孔氧化钴纳米板的大表面积以及富集的氧空位提供了更多的活性位点，从而促进了中间体的更快交换和更有效的电子转移。所制备的氧化钴纳米板在1 M KOH中的10 mA / cm ^2下表现出低至306 mV的氧释放反应（OER）超电势，优于大多数报道的Co基电催化剂的值。