利用表面活性剂十二烷基磺酸钠（SDSN）的调控合成不同粒径的硒模板和铂纳米空球（Pthollow），并将其修饰于玻碳（GC）基底即可制得Pthollow/GC电极；采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、高分辨透射电子显微镜（HR-TEM）和X射线光电子能谱等观察表征了Pthollow样品的形貌与组成；以甲醇为探针分子，研究Pthollow/GC和电沉积铂电极（Ptnano/GC）对甲醇氧化的电催化活性. 结果表明，由铂原子簇团构筑的多孔铂纳米空球粒径均匀，分散性好；用4 μmol·L-1 SDSN控制合成的直径为130 nm的Pthollow制备的Pthollow/GC电极对甲醇氧化的电催化活性最佳.
林旋
,
程美琴
,
商中瑾
,
熊婷
,
张贤土
,
田伟
,
林剑云
,
钟起玲
,
任斌
. Pt纳米空球粒径的可控制备及其甲醇电催化氧化[J]. 电化学, 2014
, 20(6)
: 571
-575
.
DOI: 10.13208/j.electrochem.140318
The selenium (Se) templates and hollow platinum (Pthollow) nanospheres with different sizes were controllably synthesized by adjusting the concentration of sodium dodecyl sulphonate (SDSN) (CSDSN, μmol·L-1) which was used as a surfactant. Accordingly, the Pthollow nanospheres modified glassy carbon (GC) electrode (Pthollow/GC) was prepared. The morphology and composition of Pthollow nanospheres were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), energy dispersive X-ray spectroscopy (EDX), high resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED) and X-ray diffraction (XRD) techniques. The electrocatalytic activities of Pthollow/GC and electrodeposited Pt nanoparticles modified glassy carbon electrode (Ptnano/GC) toward methanol oxidation were studied. The results showed that the uniform diameter sizes with well distributions were obtained with the synthesized porous Pthollow nanospheres constructed by Pt atom clusters were . The best electrocatalytic activity toward methanol oxidation was achieved with the Pthollow/GC having a diameter of 130 nm synthesized with CSDSN = 4 μmol·L-1
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