Pt nanoparticles incorporated into phosphorus-doped ordered mesoporous carbons: enhanced catalytic activity for methanol electrooxidation
Pt nanoparticles incorporated into phosphorus-doped ordered mesoporous carbons: enhanced catalytic activity for methanol electrooxidation
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DOI：
10.1016/j.electacta.2014.02.068
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发表时间：
2014-05-01
影响因子：
6.6
通讯作者：
Guo, Liping
中科院分区：
文献类型：
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作者：
Song, Pei;Zhu, Liande;Guo, Liping
以SBA-15为硬模板剂，蔗糖为碳源，三苯基膦为磷源，采用硬模板法成功合成了不同磷含量的磷掺杂有序介孔碳（POMC）。Pt纳米粒子的尺寸为3.5 +/- 0.4nm沉积在POMC的框架。P的掺杂促进了Pt纳米粒子的分散，并加速了含氧官能团的形成。采用透射电子显微镜（TEM）、X射线衍射（XRD）、拉曼光谱、氮气吸附-脱附和X射线光电子能谱（XPS）对Pt/POMCs纳米复合材料进行了表征。循环伏安法和计时电流法研究表明，Pt/POMCs，尤其是Pt/P7 OMCs具有比Pt/OMCs、PtRu/XC和商品Pt/C催化剂更大的电化学活性表面积（ECSA）、更高的电催化活性、更负的起始电位和更长的电氧化稳定性。这些性能的提高表明Pt/P7 OMCs催化剂可能是直接甲醇燃料电池（DMFC）的优良阳极催化剂。(c)2014爱思唯尔有限公司版权所有。
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 +/- 0.4nm 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 electro oxidation 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). (c) 2014 Elsevier Ltd. All rights reserved.