佩多:嘘
计时安培法
循环伏安法
电催化剂
材料科学
化学工程
催化作用
甲醇
甲醇燃料
直接甲醇燃料电池
阳极
纳米颗粒
X射线光电子能谱
纳米复合材料
电化学
纳米技术
化学
电极
有机化学
物理化学
图层(电子)
工程类
作者
Mariyam Niyaz,Nurbiye Sawut,Ruxangul Jamal,Tursun Abdiryim,Zulpikar Helil,Haile Liu,Shuyue Xie,Yanyan Song
标识
DOI:10.1016/j.ijhydene.2021.07.069
摘要
In this paper, Pt nanoparticles (Pt NPs) deposited hybrid carbon support is prepared by modifying double-layered hollow carbon spheres(DLHCs)with poly(3,4-ethylenedioxythiophene) (PEDOT) and used as anode catalyst of methanol oxidation. The structure of nanocomposites is characterized by SEM, TEM, FT-IR, XRD and XPS, confirming the greatly enhanced synergistic effect between the PEDOT and DLHCs, and illustrating the uniform distribution of Pt NPs on the PEDOT/DLHCs composite surface with a small particle size (~2.63 nm). Cyclic voltammetry, chronoamperometry and impedance spectroscopy applied to determine the electrocatalytic activity of catalysts, it is found that the synthesized PEDOT/DLHCs/Pt possesses excellent characteristics such as large electrochemically active surface area and high mass activity of 59.45 m2 g−1 and 807 mA mg−1 in 0.5 M H2SO4 containing 1 M methanol solution, which is almost 1.24 and 2.8 times greater than those of commercial Pt/C, and the catalyst exhibits superior stability after 500 durability cycles. The enhanced electrocatalytic behavior can be ascribed to the excellent electronic conductivity of PEDOT-modified DLHCs and the strong binding of PEDOT/DLHCs to Pt NPs, suggesting that the PEDOT/DLHCs/Pt is a promising electrocatalyst for direct methanol fuel cell.
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