CAJ | 학술논문

在甲醇溶剂中，利用SnCl2作为还原剂，通过控制反应条件制备了具有不同粒径Pt粒子的炭载Pt( Pt/C)催化剂. X射线衍射( XRD)和透射电子显微镜( TEM)的结果表明， Pt/C催化剂中Pt粒子具有高度的均一性和良好的分散度.电化学研究结果显示，对于甲酸的电催化氧化， Pt/C催化剂存在着明显的粒径效应.当Pt粒子粒径为3.2 nm时， Pt/C催化剂对甲酸的电催化氧化活性最佳. Pt/C催化剂对甲酸氧化的粒径效应与其表面含氧基团含量、Pt粒子的比表面积及相对结晶度相关.
재갑순용제중，이용SnCl2작위환원제，통과공제반응조건제비료구유불동립경Pt입자적탄재Pt( Pt/C)최화제. X사선연사( XRD)화투사전자현미경( TEM)적결과표명， Pt/C최화제중Pt입자구유고도적균일성화량호적분산도.전화학연구결과현시，대우갑산적전최화양화， Pt/C최화제존재착명현적립경효응.당Pt입자립경위3.2 nm시， Pt/C최화제대갑산적전최화양화활성최가. Pt/C최화제대갑산양화적립경효응여기표면함양기단함량、Pt입자적비표면적급상대결정도상관.
In methanol solvent, using SnCl2 as reducing agent, carbon supported Pt( Pt/C) catalysts with dif-ferent size of Pt particles were prepared. X-ray diffraction( XRD) and transmission electron microscopy( TEM) measurements demonstrated that in the obtained Pt/C catalysts, the Pt particles have great uniformity and good dispersion. The electrochemical experiments indicated that the effect of average particle size of Pt/C catalysts for formic acid oxidation is obvious. The Pt/C catalyst with 3. 2 nm average size of the Pt particles exhibited the optimal electrocatalytic performance for formic acid oxidation. This effect of particle size may be related to the quantity of the oxygen-containing species on the surface of the catalyst, the apparent surface area and the relative crystallinity of the platinum particles.