无定形MoO_(x)/C复合材料的制备与电催化析氢性能  

Synthesis of Amorphous MoO_(x)/C Composites as Electrocatalyst for Hydrogen Evolution Reaction

作　　者：古思勇 张厚安 麻季冬 秦明礼 GU Si-yong;ZHANG Hou-an;Ma Ji-dong;QIN Ming-li(School of Materials Science and Engineering,Xiamen University of Technology,Xiamen 361024,Fujian,China;Xiamen Key Laboratory for Powder Metallurgy Technology and Advanced Materials,Xiamen 361024,Fujian,China;Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China;Beijing Advanced Innovation Center for Materials Genome Engineering,Beijing 100083,China)

机构地区：[1]厦门理工学院材料科学与工程学院,福建厦门361024 [2]厦门市粉末冶金技术与新材料重点实验室,福建厦门361024 [3]北京科技大学新材料技术研究院,北京100083 [4]北京市材料基因工程高精尖创新中心,北京100083

出　　处：《中国钼业》2022年第1期33-40,共8页China Molybdenum Industry

基　　金：福建省自然科学基金项目(2020J01288,2019J01870)。

摘　　要：钼基氧化物是典型的过渡金属氧化物,具有特殊的能带结构,是一种极具潜力的非贵金属电解水析氢催化材料。本研究利用溶液燃烧合成技术,以四水钼酸铵为钼源,葡萄糖为碳源,合成了无定形结构的MoO_(x)/C复合材料,研究了葡萄糖添加量对产物相态和显微结构的影响,评价了MoO_(x)/C的电催化析氢性能。研究表明,随葡萄糖添加量的增加,MoO_(x)的相态与形貌从粗大颗粒→细小颗粒和部分无定形态→完全无定形结构进行演变。当葡萄糖与钼源的摩尔比值为2.5时,可合成无定形结构的MoO_(x)/C复合材料,将其作为析氢催化剂,在0.5 mol/L H 2 SO 4条件下的起始电位为132 mV,过电位(η10)为212 mV,塔菲尔斜率为84.9 mV/dec,具有良好的析氢催化性能和优异的循环使用稳定性,这归因于无定形结构提供了丰富的催化活性位点以及碳的引入提高了导电性和结构稳定性。Molybdenum-based oxide is a typical transition metal oxide with a special energy band structure.It is a potential non-noble metal catalytic material for electrolysis of water for hydrogen production.In this study,MoO_(x)/C composites with amorphous structure were synthesized by using solution combustion synthesis technology that uses ammonium molybdate tetrahydrate as molybdenum source and glucose as carbon source.The effects of glucose addition on the phase and microstructure of the products were studied,and the electrocatalytic hydrogen evolution performance of MoO_(x)/C was evaluated.The results have shown that the phase and morphology of MoO_(x) change from coarse particles to fine particles and partially amorphous to completely amorphous structure with the increase of glucose addition.When the molar percentage of glucose to molybdenum was 2.5,the amorphous MoO_(x)/C composite can be synthesized,which has excellent catalytic performance and recycling stability as the hydrogen evolution catalyst.In 0.5 mol/L H 2 SO 4 electrolyte,the initial potential was 132 mV,the overpotential(η10)was 212 mV,and the tafel slope was 84.9 mV/dec,which was attributed to the rich catalytic active sites of amorphous structure and the improvement of conductivity and structural stability of the introduction of carbon.

关 键 词：氧化钼 析氢 溶液燃烧合成 无定形 电催化 

分 类 号：O646[理学—物理化学]