Electrocatalytic activity of silver modified gold film for glucose oxidation and its potential application to fuel cells
Electrocatalytic activity of silver modified gold film for glucose oxidation and its potential application to fuel cells
复制标题
DOI：
10.1016/j.matlet.2006.09.013
复制
发表时间：
2007-05
影响因子：
3
通讯作者：
C. Jin;I. Taniguchi
中科院分区：
文献类型：
--
作者：
C. Jin;I. Taniguchi
采用循环伏安法研究了亚单层银修饰金膜电极在碱性溶液中对葡萄糖氧化的电催化活性，以及电极尺寸、葡萄糖浓度和负载电解质浓度对反应的影响。对利用葡萄糖氧化的燃料电池的性能进行了评价。通过在云母上蒸发金，制备了大尺寸的金膜电极。通过银欠电位沉积对金电极进行亚单层修饰后，葡萄糖氧化过程中峰值电位负移约0.1 V，峰值电流略大，且峰值电流与电极尺寸和葡萄糖浓度成正比。氧化峰也受到支撑电解质的影响，如果没有达到一定浓度的氢氧化钠，氧化峰表现为电位的正偏移和电流的下降。银修饰金膜电极的催化活性稳定，并能在葡萄糖-空气燃料电池中获得一定功率的电能。
The electrocatalytic activity of the submonolayer silver modified gold film electrodes for the glucose oxidation in alkaline solution and the influences of the electrode size, the glucose concentration and the supporting electrolyte concentration on the reaction were investigated using cyclic voltammetry. The performance of a fuel cell utilizing the glucose oxidation was also evaluated. Gold film electrodes of large size were prepared by evaporating gold onto micas. The submonolayer modification of gold electrodes by silver underpotential deposition resulted in about 0.1 V negative shift in peak potential and a little larger current in the glucose oxidation, and the peak current obtained was proportional to the electrode size and the glucose concentration. The oxidation peak was also affected by the supporting electrolyte, showing a positive shift in potential and a drop in current if a certain concentration of sodium hydroxide was not reached. The catalytic activity of the silver modified gold film electrodes was stable, and a certain power of electricity was obtained with a glucose–air fuel cell.