金纳米颗粒/二硫化钼复合材料的氢气析出反应电催化性能研究  

The hydrogen evolution reaction on gold nanoparticles modified MoS_2 nanosheets

作　　者：施毅[1] 张倩[1] 周钺[1] 杨冬蕊[1] 王凤彬[1] 夏兴华[1] Yi Shi Qian Zhang Yue Zhou Dong-Rui Yang Feng-Bin Wang Xing-Hua Xia(State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China)

机构地区：[1]生命分析化学国家重点实验室,南京大学化学化工学院,南京210023

出　　处：《中国科学：化学》2017年第5期676-682,共7页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(编号:21635004,21675079)资助项目

摘　　要：氢气是下一代清洁和可再生能源的最佳燃料.电化学技术是现有的高效产氢技术之一.二维层状二硫化钼(MoS_2)材料被誉为潜在的氢气析出反应(HER)催化剂.通过调节MoS_2的电子态密度可以改善其对HER的电催化性能.我们研究了通过直接还原法合成出金纳米粒子/二硫化钼(Au-MoS_2)复合材料.X射线光电子能谱和拉曼谱表征结果表明,Au和MoS_2间存在着强烈的电子相互作用,Au纳米粒子中的部分电子注入MoS_2的导带,增加了MoS_2电荷密度,使其能级与HER能级更加匹配,使HER的电催化活性得到显著改善,Au-MoS_2对HER电催化的过电势降低了50 mV.Hydrogen has been considered as the clean and renewable energy source of the next generation by virtue of its high energy density and environmentally friendly combustion product. Electrochemically evolving hydrogen by splitting water is one of the most efficient strategies for hydrogen generation. Previous studies have revealed that two-dimensional layered molybdenum disulfide （MoSs） based materials would be the promising HER catalysts. Tuning the electronic density ofMoS2 electrocatalyst has emerged as an effective strategy to optimize the electrocatalytic activities. Herein, we utilized in-situ reduction method to synthesize gold nanoparticles modified MoSz nanosheets （Au-MoS2） hybrid. X-ray photoelectron spectroscopy and Raman spectroscopy were used to confirm the strong electronic interaction between Au and MoSz. The Au-MoS2 shows superior electrocatalytic activity towards HER, as evidenced by the onset potential decreased by 50 mV as compared to ce-MoS2. The HER enhancement can be largely attributed to the increase of carrier density in MoSz injected from Au nanoparticles, which results in the modulation of the energy level of MoS2 more comparable to HER.

关 键 词：金纳米粒子 二硫化钼 氢气析出反应 电子相互作用 电荷密度 

分 类 号：O643.36[理学—物理化学] TQ116.2[理学—化学]