Co₃O₄纳米片是一种性能优异的电催化剂材料，其多孔结构影响电催化析氧（OER）的性能。通过溶剂热法结合热处理调控Co₃O₄纳米片的多孔结构，并利用XRD、SEM、TEM和N₂吸附-脱附（BET）等方法表征了不同煅烧温度（300、400、500℃）下的物相与多孔结构。电催化性能表征结果表明，Co₃O₄纳米片具有最大的比表面积（93.02 m²/g）、最优的介孔孔容（0.196 cm³/g）的多孔结构（300℃煅烧样品），表现出最优的OER性能：起始电位为1.539 V，过电势为0.37 V，Tafel斜率为49 mV/dec。

Co₃O₄ nanosheet is a kind of excellent electrocatalyst material,with its porous structure affecting the performance of electrocatalytic oxygen evolution reaction (OER).Unfortunately,its OER performance is still too poor to be applied commercially.Co₃O₄ meso-porous nanosheet is synthesized by calcinating the precursors obtained through solvothermal method.Its crystal and pore structure are characterized by XRD,SEM,TEM and N₂ adsorption-desorption measurement.Influences of calcinating temperatures (300℃,400℃ and 500℃) on the specific surface area,porous structure and OER performance of Co₃O₄ are studied.The results show that the Co₃O₄ nanosheet treated at 300℃ has the optimal mesoporous pore volume (0.196 cm³·g^-1),the largest specific surface area (93.02 m²·g^-1) and the largest electrochemical activity area.It leads to the best OER performance,of which the onset potential is 1.539 V,the overpotential is 0.37 V and Tafel slope is 49 mV·dec^-1.

刘柳(1993-),女,硕士研究生,研究方向为过渡金属氧化物的电催化,ll317@mail.ustc.edu.cn