X.C. Chen
,
Y.X. Liu
,
J. Li
金属学报(英文版)
An improved thermal decomposition method is used to prepare modified titanium base anode. Some researches have been carried out to learn about the oxygen evolution properties of RuMn, RuCo, RuCe and RuEu etc. in H2SO4 solution and their effect on the electrooxidation of methanol if added into the catalytic layers of Pt/Ti electrodes. The result indicates that the Pt/Ti electrodes containing RuMn, RuCo and RuEu etc. metal oxide catalysts with the powerful evolution property exhibit a higher electro-catalytic activity towards methanol electrooxidation than Pt/Ti electrodes without composite metal oxide catalysts.
关键词:
direct methanol fuel cell
,
null
,
null
,
null
蒋利民
,
王汉丹
,
杨永生
,
李维
,
彭淑合
,
田昭武
应用化学
doi:10.3969/j.issn.1000-0518.2009.11.021
研究了Ir/IrO_2微平面电极在低碳醇氧化电极表面的pH-E_(ocp)(pH-开路电位)关系,测量了几种低碳醇在电化学氧化过程中距离电极表面50 μm以内的不同距离处的pH值,对不同低碳醇电化学氧化产生的酸强度进行了比较与分析;Ir/IrO_2微平面电极的pH-E_(ocp)关系曲线与"醇-羧酸"体系种类有关;乙二醇在电化学氧化过程中产生的pH值最低,甲醇次之,乙醇产生的pH值最高,在500 nm处的稳态pH值分别为0.191、1.13和2.99. 通过向电解液中加入NaF,考察了生成的H~+和F~-结合对金属钛选择性微区刻蚀作用,在乙二醇为前驱体的体系中微孔刻蚀加工速率约为30 nm/min.
关键词:
低碳醇
,
电化学氧化
,
pH测量
,
Ir/IrO_2微平面电极
,
刻蚀
