NaxWO3与NaxWO3/Pt晶体电极电催化氧还原性能
来源期刊:中南大学学报(自然科学版)1996年第1期
论文作者:黄欢 杨松青
文章页码:121 - 124
关键词:电催化; NaxWO3; NaxWO3/Pt; 氧电极;
Key words:electrocatalysis; NaxWO3; NaxWO3/Pt; oxygen electrodes
摘 要:采用循环伏安法与稳态恒电流法,对钠 钨青铜(NaxWO3)晶体电极及含铂的钠钨青铜(NaxWO3/Pt)晶体电极在酸性介质中(0.05mol/LH2SO4)的电催化氧还原性能进行了 研究.实验结果表明,两者对氧阴极还原过程都有电催化作用,且后者明显强于前者,但均弱于金属铂(Pt)电极.作者还提出了NaxWO3及 NaxWO3/Pt对氧还原反应可能的催化机理,认为高度分散状态的Pt提高了NaxWO3的催化能力.
Abstract: The catalytic activity of pure sodium tungsten bronze (NaxWO3) and Pt-doped sodium tungsten bronze (NaxWO3/Pt) crystals for cathodic oxygen reduction was studied in acidic solution (0. 05 mol/L H2SO4). Experimental results reveal that NaxWO3 and NaxWO3/Pt have an electrocatalytic effect on oxygen reduction, and the later is much more active than the former, but both are less than Pt electrode. Moreover, a mechanism for oxygen reduction by NaxWO3 and NaxWO3/Pt is proposed, and it is concluded that highly dispersive platinum in crystal will improve the electrocatalytic activity.