副教授
硕士生导师
教师拼音名称:yujianhua
学历:博士研究生
学位:工学博士
职称:副教授
毕业院校:中科院上海硅酸盐研究所
邮箱:
2020-06-08 青岛科技大学毕业生最喜爱的老师
2019-12-31 青岛科技大学先进工作者
2016-12-31 青岛科技大学先进工作者
最后更新时间:..
摘要:In this work, Pt and Pt-Ru nanoparticles were synthesized on both graphene and nitrogen (N)-doped graphene sheets, and their effects on electrocatalytic activity for methanol oxidation were investigated using cyclic voltammetry and electrochemical impedance spectroscopy. Experimental results show that, in comparison to pure graphene as catalyst support, N-doped graphene-supported Pt and Pt-Ru nanoparticles demonstrate enhanced characteristics for methanol electro-oxidations with regard to oxidation potential, forward peak oxidation current density, and charge transfer resistance. For instance, the forward peak current densities of graphene-supported Pt and Pt-Ru nanoparticles were 9.5 mA/cm(2) and 7.3 mA/cm(2), respectively; however, the current densities of N-doped graphene-supported Pt and Pt-Ru nanoparticles were 19.9 mA/cm(2) and 16.2 mA/cm(2), respectively. The doping of nitrogen into graphene can effectively improve the currently density by twice. Our findings suggest the use of N-doped graphene sheets as promising catalyst supports for direct methanol fuel cells. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4798433]
卷号:5
期号:2
是否译文:否