硫化铁/硫化钴复合材料的合成及催化应用

Synthesis and catalytic application of FeS_(2)/CoS_(2) composite

采用两步法合成了Fe/Co双金属硫化物硫化铁/硫化钴(FeS_(2)/CoS_(2)),并对其相应的电催化析氧性能进行了研究。催化实验结果显示,FeS_(2)/CoS_(2)催化剂具有良好的催化活性和催化稳定性。当电流密度为10mA/cm^(2)时,与FeS_(2)、CoS_(2)和两金属硫化物的混合物FeS_(2)-CoS_(2)等催化剂相比,FeS_(2)/CoS_(2)需要相对较小的过电位(370mV)、具有较小的塔菲尔斜率值(69mV/dec)和更好的催化性能。

The Fe/Co bimetallic sulfide(denoted as FeS_(2)/CoS_(2))was prepared via a two-step method,and investigated the corresponding electrocatalytic properties towards oxygen evolution reaction(OER).The catalytic results revealed that the FeS_(2)/CoS_(2)catalyst displayed efficient activity and good stability.Compared to the catalyst of their mono-metallic sulfides FeS_(2),CoS_(2)and the physical mixture of FeS_(2)and CoS_(2)samples(FeS_(2)-CoS_(2)),the FeS_(2)/CoS_(2)catalyst exhibited relatively smaller overpotential of 370mV at the current density of 10mA/cm^(2),smaller Tafel slope(69mV/dec)and higher catalytic performance.