棒状FeS2/NiS2和FeP/Ni2P材料的合成与催化性能比较

以Fe(NO3)3?9H2O、Ni(NO3)2?6H2O、硫粉或NaH2PO2?H2O为原料，通过两步法合成了FeS2/NiS2、FeP/Ni2P复合材料，通过XRD、SEM和TEM对材料的结构和形貌进行了表征，研究了其析氧催化性能。结果表明，上述催化剂均具有很好的催化性能。在电流密度为10 mA/cm2时，FeP/Ni2P需要较小的过电位（300 mV），表现出比FeS2/NiS2（300 mV）更好的催化活性。FeP/Ni2P催化剂相应的塔菲尔斜率值（48 mV/dec）也比FeS2/NiS2 (71 mV/dec)的小，表示在析氧反应中FeP/Ni2P催化剂具有更好的催化动力学性能。

Synthesis and catalytic performance comparison of rod-shaped FeS2/NiS2 and FeP/Ni2P

The FeS2/NiS2 and FeP/Ni2P composites have beeen synthesized through a two-step method using Fe(NO3)3?9H2O, Ni(NO3)2?6H2O, sulfur powder or NaH2PO2?H2O as raw materials. The structure and morphology are characterized by using XRD, SEM and TEM, the catalytic performances of the two catalysts for oxygen evolution reaction have been investigated. The results show that the catalysts described above exhibit excellent catalytic performances. The FeP/Ni2P composite show higher catalytic activity with small overpotentials of 300 mV at the current density of 10 mA/cm2 for the OER than FeS2/NiS2 (370 mV). The corresponding Tafel slope of the FeP/Ni2P catalyst (48 mV/dec) are also smaller than FeS2/NiS2 (71 mV/dec), revealing more favorable electrocatalytic kinetics on the FeP/Ni2P catalyst for the OER.