Pt nanoparticles incorporated into phosphorus-doped ordered mesoporous carbons: enhanced catalytic activity for methanol electrooxidation

详细信息    查看全文

• 作者：Pei Song ; Liande Zhu ; Xiangjie Bo ^{baoxj133@nenu.edu.cn" class="auth_mail} ; Aixia Wang ; Guang Wang ; Liping Guo ; ^{guolp078@nenu.edu.cn" class="auth_mail}
• 关键词：Methanol Electrooxidation ; Pt nanoparticles ; Phosphorus-doped ordered mesoporous carbons ; Electrocatalyst ; Direct methanol fuel cell
• 刊名：Electrochimica Acta
• 出版年：1 May, 2014
• 年：2014
• 卷：127
• 期：Complete
• 页码：307-314
• 全文大小：3031 K

文摘

Phosphorus-doped ordered mesoporous carbons (POMCs) with different P content are successfully synthesized by hard template method using SBA-15 as hard template, sucrose as carbon precursor and triphenylphosphane as phosphorus precursor. Pt nanoparticles with size of 3.5 卤 0.4 nm are deposited on the framework of POMCs. The doping of P into OMCs facilitates the dispersion of Pt nanoparticles and accelerates the formation of oxygen-containing functional groups. Pt/POMCs nanocomposites were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, nitrogen adsorption-desorption and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry and chronoamperometry studies exhibit that the Pt/POMCs, especially Pt/P₇OMCs, have larger electrochemical active surface area (ECSA), higher electrocatalytic activity, more negative onset potential and long-time stability for the electrooxidation toward methanol than that of Pt/OMCs, PtRu/XC and commercial Pt/C catalysts. These enhanced performances indicate that Pt/P₇OMCs catalyst may be an excellent anode catalyst for direct methanol fuel cell (DMFC).