期刊
NEW JOURNAL OF CHEMISTRY
卷 40, 期 10, 页码 8681-8695出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nj00302h
关键词
-
资金
- MHRD, India
A simple approach and surfactant free methodology has been employed to synthesize high surface area core/shell nano engineered electrocatalysts for fuel cell applications. Pt@PdM3/C (M = Mn, Fe, Co, Ni, Cu) core/shell electrocatalysts were synthesized in a two stage process i.e. firstly a high surface area core was synthesised by simple borohydride reduction in ethylene glycol using a specially assembled experimental setup and then Pt was coated on the PdM3 core surface by the polyol reduction method. The PdM3 core was maintained in a 1 : 3 atomic ratio and the Pt shell on PdM3 was fixed at a 1 : 3 weight ratio. XRD results confirm the covering of the PdM3 core with the Pt shell. HR-TEM images show the distribution, shape and size of particles in high surface area carbon. The compositional studies were analyzed by SEM-EDAX and ICP-OES experiments. Electrochemical measurements were done by cyclic voltammetry, RDE and RRDE techniques. CV patterns confirmed the presence of Pt on the surface of the PdM3 core. The Pt@PdM3/C electrocatalyst showed an enhanced ECSA value compared to commercial Pt/C. RDE and RRDE techniques revealed that Pt@PdM3/C core/shell nano structures follow a four electron transfer mechanism. Among all the electrocatalysts, the mass activity of Pt@PdNi3/C is 10 fold higher than Pt/C and the specific activity of Pt@PdNi3/C is around 20 fold higher than Pt/C. Pt@PdNi3/C shows better enhancement in half wave potential (E-1/2) than others. The real time cell performance of the electrocatalysts revealed that Pt@ PdM3/C (M = Mn, Fe, Co, Ni, Cu) core/shell nano engineered electrocatalysts show higher performance than commercial Pt/C.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据