Na_xWO₃与Na_xWO₃/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; Na_xWO₃; Na_xWO₃/Pt; 氧电极;

Key words：electrocatalysis; Na_xWO₃; Na_xWO₃/Pt; oxygen electrodes

摘    要：采用循环伏安法与稳态恒电流法,对钠 钨青铜(Na_xWO₃)晶体电极及含铂的钠钨青铜(Na_xWO₃/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Na_xWO₃及 Na_xWO₃/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Na_xWO₃的催化能力.

Abstract: The catalytic activity of pure sodium tungsten bronze (Na_xWO₃) and Pt-doped sodium tungsten bronze (Na_xWO₃/Pt) crystals for cathodic oxygen reduction was studied in acidic solution (0. 05 mol/L H₂SO₄). Experimental results reveal that Na_xWO₃ and Na_xWO₃/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 Na_xWO₃ and Na_xWO₃/Pt is proposed, and it is concluded that highly dispersive platinum in crystal will improve the electrocatalytic activity.