羟丙基-β-环糊精修饰纳米碳管载钯催化剂的制备及其甲酸氧化性能

A Facile Preparation of Palladium Nanoclusters Supported on Hydroxypropyl-β-Cyclodextrin-modified MWCNTs for Formic Acid Oxidation

以羟丙基-β-环糊精(HP-β-CD)为添加剂修饰碳纳米管为复合载体,常温常压下,成功合成了Pd纳米簇状结构,并用于甲酸的电催化氧化.XRD及TEM结果表明,制备出的Pd纳米簇状结构由粒径均匀,约为3.6nm的纳米颗粒组成,且高度分散沉积在载体表面.循环伏安测试结果表明,催化剂Pd/HP-β-CD-MWCNTs对甲酸氧化表现出了较高的催化活性和电化学比表面积.研究表明,在HP-β-CD存在条件下,将Pd纳米簇沉积在未作处理的碳纳米管上制备的催化剂适合应用于甲酸燃料电池.

Palladium nanoclusters composed of nanoparticles with uniform size and high dispersion have been successfully assembled on hydroxypropyl-β-Cyclodextrin （HP-β-CD） modified MWCNTs via a sodium borohydride reduction process. According to the transmission electron microscopy （TEM） measurements, the average particle size of the as-prepared Pd nanopar- ticles dispersed on HP-β-CD modified MWCNTs is 3. 6 nm. Electrochemical studies reveal that the Pd/HP-β-CD-MWCNTs nanocomposites show excellent electrocatalytic activity towards formic acid oxidation, which can be used as a better potential candidate for application in a direct formic acid fuel cell （DFAFC）.