【摘要】 应用电化学循环伏安和石英晶体微天平 (EQCM )研究了 1 ,3 -丁二醇 ( 1 ,3 -BDL )在Pt电极和以Sb、S吸附原子修饰的Pt(Pt/Sbad和Pt/Sad)电极上的吸附和氧化过程。从电极表面质量变化的结果分析 ,可认为 1 ,3 -丁二醇的氧化与电极表面氧物种有着极其密切的关系。Pt电极表面Sb吸附原子能在较低的电位下吸附氧 ,可显著提高 1 ,3 -丁二醇电催化氧化活性。与Pt电极相比较 ,饱和吸附Sb原子的Pt电极 ,1 ,3 -丁二醇氧化的峰电位负移了 0 2 5V ,峰电流增加了近 1倍。相反 ,Pt电极表面S吸附原子的氧化会消耗表面氧物种 ,饱和吸附S原子的Pt电极上 1 ,3 -丁二醇的电氧化受到抑制。本文从表面质量变化提供了吸附原子电催化作用的新数据。更多还原

【Abstract】 The processes of adsorption and oxidation of 1,3-butanediol on Pt and Pt modified with Sb and S in saturation(Pt/Sb ad and Pt/S ad )electrodes were studied by using cyclic voltammetry and electrochemical quartz crystal microbalance(EQCM).The results demonstrated that the oxidation of 1,3-butanediol depended strongly on oxidation states of electrode surface.Sb adatoms on Pt surface could adsorb oxygen at relatively low potentials,and exhibited catalytic effects for 1,3-butanediol oxidation.In comparison with the case of Pt electrode,the oxidation peak potential of 1,3-butanediol on Pt surface modified with Sb in saturation was negatively shifted about 250 mV with peak current being doubly increased.In a contrary,the oxidation of S adatoms consumed oxygen species of Pt electrode surface.As a consequence,the oxidation of 1,3-butanediol was inhibited on Pt surface modified with S in saturation.The EQCM studies provided quantitative results of surface mass changes during 1,3-butanediol oxidation,and threw new light in elucidating different effects of adatoms Sb ad and S ad on Pt electrode surface towards 1,3-butanediol oxidation.更多还原