以C04(CO)12和Se为原料,采用低温回流方法在乙二醇介质中合成了CoSeO3化合物.利用扫描电镜(SEM)、X射线衍射仪(XRD)和旋转圆盘电极(RDE)技术表征合成的化合物微观形貌、结构特征和电化学性能.这种化合物主要由单斜结构的CoSeO3·H2O晶粒组成,粒径大小约为26.7 nm,具有规则的晶体外形.在25℃,0.5 mol/L H2SO4电解液中,CoSeO3化合物对氧还原反应(ORR)表现出明显的电催化活性,开路电位为0.80 V(vs NHE).根据Koutecky-Levich方程计算出每个氧分子还原过程转移的电子数约为3.8.在0.64～0.76 V(vs NHE)电位范围内,测得催化剂的传递系数、Tafel斜率和交换电流密度分别为0.50、119 mV和1.98×10-6 mA/cm2.CoSeO3化合物的催化活性和电化学稳定性也与商品Pt催化剂进行了比较.
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