通过与氧化石墨烯复合增强金属有机框架材料MOF(Ni)-74的电催化析氢性能

Improved Electrocatalytic Hydrogen-evolution Performance of Metal-Organic Framework MOF(Ni)-74 by Using Graphene Oxide Decorations

采用溶剂热法制备了金属有机框架材料MOF(Ni)-74及其与氧化石墨烯(GO)的复合材料MOF(Ni)-GO,并利用线性伏安扫描(LSV)等电化学方法在N_2饱和的0.5mol/L H_2SO_4溶液中对材料的电催化性能进行了检测。实验结果表明,GO的掺杂能显著提升金属有机框架材料MOF(Ni)-74的电催化活性。其中GO含量为8%时,所得复合材料表现出最好的电催化析氢活性,起始电势仅为-0.462V,塔菲尔斜率为110mV/dec,同时该材料也表现出很好的电化学稳定性。

Using a solvothermal method,the metal-organic framework MOF（Ni）-74 and a series of its derivatives MOF（Ni）-GO（w%）differing in graphene oxide（GO）content（w%）were synthesized,and subsequently the linear sweep voltammetry（LSV）test was conducted in a N2-saturated 0.5 mol/L H2SO4 solution in order to determine the electrocatalytic performance of the products to hydrogen evolution reaction（HER）.Our experiment confirmed the significantly improved electrocatalytic activity of the GO-decorated MOF（Ni）-74 catalysts,among which the MOF（Ni）-GO（8%）exhibited the best electrochemical catalytic performance towards HER with the lowest onset potential（-0.462 V）,the smallest Tafel slope（110 mV/dec）,as well as an excellent electrochemical stability.