CAJ | 학술논문

以硝酸银为前驱体，聚乙烯吡咯烷酮( PVP)为表面活性剂，抗坏血酸( AA)为还原剂，在18℃下通过调节氢氧化钠的加入量合成了2种不同粒径的银溶胶；以银溶胶为模板，在室温下合成了不同粒径的铂包银( Ag@Pt)实心纳米粒子；用浓氨水除去Ag核得到球壳上含残留银的铂纳米空球[( Pt-Ag) hol ow ]及其修饰玻碳( GC)电极[( Pt-Ag) hol ow/GC]；再用电化学法除去( Pt-Ag) hol ow/GC电极上的残留银后，制得铂纳米空球(Ptholow)修饰的GC电极(Ptholow/GC)。采用扫描电子显微镜(SEM)、高分辨透射电子显微镜(HRTEM)、能量色散谱仪( EDS)和X射线衍射仪( XRD)等表征了Pthol ow的形貌、组成和结构；以甲醇为探针分子，研究比较了Pthol ow/GC和实心铂纳米粒子( Ptnano )修饰GC电极( Ptnano/GC)对甲醇氧化的电催化活性。结果表明， Pthol ow分散性好，粒径比较均匀；球壳多孔，具有粗糙的内外表面，比表面积大，是由铂原子和多维多级的铂原子团簇构建的结晶度不高的多晶铂； Pthol ow/GC对甲醇的电催化氧化活性明显优于Ptnano/GC电极，且大大降低了贵金属Pt的用量。
이초산은위전구체，취을희필각완동( PVP)위표면활성제，항배혈산( AA)위환원제，재18℃하통과조절경양화납적가입량합성료2충불동립경적은용효；이은용효위모판，재실온하합성료불동립경적박포은( Ag@Pt)실심납미입자；용농안수제거Ag핵득도구각상함잔류은적박납미공구[( Pt-Ag) hol ow ]급기수식파탄( GC)전겁[( Pt-Ag) hol ow/GC]；재용전화학법제거( Pt-Ag) hol ow/GC전겁상적잔류은후，제득박납미공구(Ptholow)수식적GC전겁(Ptholow/GC)。채용소묘전자현미경(SEM)、고분변투사전자현미경(HRTEM)、능량색산보의( EDS)화X사선연사의( XRD)등표정료Pthol ow적형모、조성화결구；이갑순위탐침분자，연구비교료Pthol ow/GC화실심박납미입자( Ptnano )수식GC전겁( Ptnano/GC)대갑순양화적전최화활성。결과표명， Pthol ow분산성호，립경비교균균；구각다공，구유조조적내외표면，비표면적대，시유박원자화다유다급적박원자단족구건적결정도불고적다정박； Pthol ow/GC대갑순적전최화양화활성명현우우Ptnano/GC전겁，차대대강저료귀금속Pt적용량。
Ag nanoparticles with two different particle sizes and uniform size-distribution were prepared at 18 ℃ by adjusting the adding amount of the NaOH solution, using silver nitrate as the precursor, polyvi-nylpyrrolidone( PVP) as the surfactant, ascorbic acid( AA) as the reductant. Pt hollow( Pthol ow ) nanospheres with different shell thicknesses and modified glassy carbon( GC) electrode( Pthol ow/GC) were synthesized by adjusting the amount of precursor H2 PtCl6 ·6H2 O at room temperature, using Ag colloids as the template. The morphology, composition and structure of Pthol ow were characterized by scanning electron microscopy ( SEM) , high resolution transmission electron microscopy ( HRTEM ) , energy-dispersive X-ray spectroscopy ( EDS) , X-ray diffraction ( XRD ) and other detection techniques; the electrocatalytic oxidation activity of Pthol ow/GC, Pt solid nanoparticle modified GC( Ptnano/GC) electrode were studied and compared using metha-nol as a probe molecule. The results show that the Pthol ow nanospheres have a uniform particle size and good dispersity, and the electrocatalytic oxidation activity of Pthol ow/GC for methanol is significantly higher than that of Ptnano/GC electrode.