通过溶剂热法以及后续热处理得到2.6 nm厚的超薄多孔Co₃O₄纳米片，这种超薄多孔结构可为反应提供更多的活性位点。并且通过简单的浸渍法在纳米片表面负载金颗粒，对纳米片进行金修饰实现对Co²⁺/Co³⁺的价态比例调控，其中Co²⁺更利于提高电催化析氧活性。结果表明，相比于未负载的Co₃O₄纳米片，金负载量为7%的Co₃O₄/Au样品析氧性能提高20%以上，并展示出更好的稳定性。

Ultrathin porous Co₃O₄ nanosheets with a thickness of 2.6 nm are synthesized through solvothermal process and subsequent heat treatment.Such ultrathin porous structure can provide more active sites for the reaction.Gold particles are loaded onto the surface of the nanosheet by a simple impregnation method afterwards.XPS results reveal that noble metal Au deposition can adjust the ratio of Co²⁺/Co³⁺,and Co²⁺ is more conducive to improve the oxygen evolution activity.Compared with the pure Co₃O₄ nanosheets,the oxygen evolution performance of Co₃O₄/Au catalyst with 7wt% gold loadings is more than 20 percent enhanced,in addition with much better stability.

孙得娟(1993-),女,硕士研究生,研究方向为纳米材料电催化,djsun@mail.ustc.edu.cn。