铜 、钴 、铁掺杂对二硫化钼电催化析氢 性能的影响
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摘要：
二硫化钼(MoS2)作为有望替代贵金属铂,进行电催化析氢反应(HER)的良好催化剂,其性能受到自身活性位点密度的限制.采用一步水热法合成不同过渡金属铜(Cu)、钴(Co)、和铁(Fe)掺杂的花形MoS2,并利用场发射扫描电子显微镜(FESEM)、X-射线衍射仪(XRD)及X-射线光电子能谱分析仪(XPS)对所合成样品进行结构表征,电化学测试考察不同过渡金属掺杂的MoS2电催化产氢性能.结果显示,摩尔分数为0.50%的3种过渡金属掺杂对MoS2的形貌和晶体结构均没有明显影响,但Cu和Co掺杂可以显著提高MoS2的电催化析氢效果,表现为MoS2析氢过电位及Tafel斜率的降低,原因可能在于Cu和Co掺杂能减小MoS2电化学析氢过程的电荷转移阻力.进一步对Cu和Co的掺杂量进行优化,结果表明摩尔分数为0.75%的Cu和1.00%的Co分别为最佳量,且制备所得材料0.75%Cu@MoS2和1%Co@MoS2在电催化析氢反应中具有一定的稳定性 .
As a potential candidate to replace noble metal Pt for electrocatalytic hydrogen evolution reaction( HER) , MoS2 shows the performance limit in its active site density. In this work, one step hydrothermal synthesis was employed to prepare differenttransition metal(Cu, Co, Fe) doped flower-like MoS2 . Meanwhile, FESEM , XRD, XPS technologies were used to characterize the as-prepared materials, and electrochemicalmeasurementwas conducted to examine their HER proper- ties. Theresultsshow thatdoping of0. 50%(molarfraction) transition metalin MoS2 had no obviousinfluenceon itsmorpholo- gy and phasestructure. However, Cu and Co doping could significantly enhancethe HER activitiesofMoS2 , exhibiting there- duced overpotentialand Tafel slope. The possible reason could be the decreased charge transfer resistance during the HER process, as a resultoftheCu and Co doping. The furtheroptimization ofthe doping amountsofCu and Co showed that0. 75% Cu and 1. 00% Co(molarfraction) were theirindividualbestconcentrations forimproving the HER performance ofMoS2 , and thereby obtaining materials(0. 75%Cu@MoS2 and 1%Co@MoS2 ) displayed good stability in HER reaction.
作者：
胡陈艳, 陈联国
Hu Chenyan, Chen Lianguo
机构地区：
武汉工程大学化学与环境工程学院;中国科学院水生生物研究所
引用本文：
胡陈艳, 陈联国.铜、钴、铁掺杂对二硫化钼电催化析氢性能的影响[J].betway官方app 学报(自然科学版) ,2024, 52(5):67-73.
Hu Chenyan,Chen Lianguo. EffectofCu,Co,and Fedoping on electrocatalytichydrogen evolution of MoS2 [J] .JournalofHenan NormalUniversity(NaturalScienceEdition) ,2024,52(5) :67-73. DOI:10. 16366/j. cnki.1000-2367. 2023. 11. 13. 0001.
基金：
国家自然科学基金 ;武汉工程大学科学研究基金
关键词：
过渡金属掺杂 ; 电催化析氢;二硫化钼
transition metaldoping; electrocatalytic hydrogen evolution; MoS2
分类号：
O643. 36
