Facile synthesis of poly(amidoamine)-modified carbon nanospheres supported Pt nanoparticles for direct methanol fuel cells
Facile synthesis of poly(amidoamine)-modified carbon nanospheres supported Pt nanoparticles for direct methanol fuel cells
复制标题
DOI：
10.1016/j.jpowsour.2011.10.112
复制
发表时间：
2012-03
影响因子：
9.2
通讯作者：
Yingqiang Huang;Haoliang Huang;Yingju Liu;Yan Xie;Zhurong Liang;Chuanhe Liu
中科院分区：
文献类型：
--
作者：
Yingqiang Huang;Haoliang Huang;Yingju Liu;Yan Xie;Zhurong Liang;Chuanhe Liu
本文研究了由铂、聚胺胺（PAMAM）和碳纳米球组成的催化剂材料的合成和表征。首先，水热合成碳纳米球，然后进行高温煅烧，以获得大量的含氧基团。然后用多功能PAMAM树状大分子修饰碳纳米球，与H2PtCl6形成配位配合物，再用硼氢化钠还原得到金属Pt。利用透射电镜（TEM）、x射线光电子能谱（XPS）和红外光谱（IR）对复合材料进行表征。采用循环伏安法、时安培法和co溶出分析法对这种新型纳米材料的电化学特性进行了详细研究。本研究结果表明，通过多功能枝状大分子修饰，可以制备复杂的碳纳米球基材料，其中Pt纳米颗粒更小、更丰富、分布更均匀，从而在直接甲醇燃料电池中提供更高的电催化能力，并在生物传感器和生物医学诊断方面的各种应用具有许多可能性。
In this work, the synthesis and characterization of a catalyst material consisted of Pt, poly(amidoamine) (PAMAM) and carbon nanospheres are investigated. Firstly, carbon nanospheres are hydrothermally synthesized, followed by a high temperature of calcination to achieve a high amount of oxygen-containing groups. Subsequently, these carbon nanospheres are modified with multifunctional PAMAM dendrimers to form coordinate complex with H2PtCl6, followed by the reduction with sodium borohydride to obtain metallic Pt. The resulting composites are characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy (IR). This new nanomaterial is used as catalysts for methanol electro-oxidation and their electrochemical features are investigated in detail by cyclic voltammetry, chronoamperometry and CO-stripping analysis. The results of this study suggest that, through modification with multifunctional dendrimers, complex carbon nanospheres-based materials can be fabricated, where Pt nanoparticles are smaller, more abundant and more uniformly distributed, thereby providing higher electrocatalytic ability in direct methanol fuel cell and many possibilities for various applications in biosensors and biomedical diagnosis.