A Comparative Study for Oxygen Reduction Velocity on Many Kinds of Metal Electrodes

多种金属电极氧还原速度的比较研究

• 批准号: 07650854
• 负责人: TACHIBANA Koj
• 金额: $ 0.26万
• 依托单位: Science University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650854/
• 关键词: Rotating disk electrode; Oxygen reduction reaction; Diffusion limiting current; Pt electrode; Au electrode; Ni electrode; Stainless electrodes; Non-ferrous electrodes; 回転ディスク電極法; 酸素拡散限界電流; 銅電極; チタン電極; インコネル600電極; 回転電極法; 酸素拡散律速; 鉄基合金; ニッケル基

Comparative study on oxygen reduction velocity and it's reaction activity was performed on various pure metals and structural alloys mainly in buffered and non-buffered neutral aqueous solutions containing air, using the rotating disk electrode. The used metallic electrodes were Pt, Au, Ni, Cu, Brass, Inconel 600, Ti, Mo, SUS 304 and SUS 316. On the cathodic polarization curves, Tafel region in which oxygen reduction reaction at the electrode surface being rate determining, oxygen diffusion region in which constant current being independent of potential increase, and hydrogen evolution one generally appear in turn with the cathodic increase in the potential. However, distinctive diffusion current was not observed on some electrodes except for Pt, Au, Ni, Cu and Mo. This could be considered to result from oxide/oxyhydroxide film on those electrodes.It is most reasonable that oxygen reduction velocity could be determined and/or compared by the exchange current density so far as the polarization curve has only a Tafel slope. In the cases of Pt, Au, Ni, Cu and Mo, the exchange current was obtained from extrapolation of Tafel line to zero in overvoltage. Those values are given in the text.On the other hand, the order in the overvoltage at a constant current in Tafel region is taken in order to compare the reaction activity in all. In this study, 1.0*10^<-4> A/cm^2 was taken as a constant current. The order in the reactivity for oxygen reduction reaction obtained from such a procedure was as follows ; Pt Ni*Au Cu Brass> SUS 304> SUS 316> Inconel 600> Ti

采用旋转圆盘电极，主要在缓冲和非缓冲的含空气中性水溶液中，对各种纯金属和结构合金的氧还原速度及其反应活性进行了比较研究。使用的金属电极是Pt、Au、Ni、Cu、黄铜、Inconel 600、Ti、Mo、SUS 304和SUS 316。在阴极极化曲线上，随着阴极电位的升高，一般依次出现电极表面氧还原反应速率决定的塔菲尔区、恒电流不受电位升高影响的氧扩散区和析氢区。然而，除了Pt、Au、Ni、Cu和Mo外，在一些电极上没有观察到明显的扩散电流。这可能是由于电极上的氧化物/羟基氧化物膜引起的，只要极化曲线只有塔菲尔斜率，用交换电流密度来确定和/或比较氧还原速度是最合理的。在Pt、Au、Ni、Cu和Mo的情况下，交换电流由Tafel线外推到过电压为零得到。另一方面，为了比较各反应活性，在塔菲尔区中，在恒定电流下的过电压的顺序也被取出来。在本研究中，取1.0*10^<-4>A/cm ^2作为恒定电流。由此过程获得的氧还原反应的反应性顺序如下：Pt Ni*Au Cu黄铜&gt; SUS 304&gt; SUS 316&gt; Inconel 600&gt; Ti

项目成果

橘 孝二.阿部光裕.中山素直: "酸素還元と水素発生に対するインコネル600合金の反応活性の二面性" 材料と環境. 46(審査中). (1997)

Koji Tachibana，Motonao Nakayama：“Inconel 600 合金对氧还原和氢生成的反应活性的双重性质”，材料与环境（1997 年）。

橘 孝二、安部 光裕、中山 素直: "酸素還元および水素発生反応に対するInconel600電極の活性特異性" 材料と環境. 47(印刷中). (1998)

Koji Tachibana、Mitsuhiro Abe 和 Nao Nakayama：“Inconel600 电极对氧还原和析氢反应的活性特异性”材料与环境 47（出版中）。

橘 孝二: "酸素電極と組み合わされたFe-Cr合金の腐食反応速度" 材料と環境. 45(発表予定). (1996)

Koji Tachibana：“铁铬合金与氧电极结合的腐蚀反应速率”材料与环境45（待发表）。

K.Tachibana, M.Abe and K.Naganuma: "Oxygen Reduction Rate on Pt, Au, SUS 304 and SUS 316 by Rotating Disk Electrode" Corrosion Science. 39 (under final revision). (1998)

K.Tachibana、M.Abe 和 K.Naganuma：“旋转盘电极对 Pt、Au、SUS 304 和 SUS 316 的氧还原率”腐蚀科学。

K.Tachibana, M.Abe and S.Nakayama: "Peculiarity of Inconel 600 Alloy in Reactivity for Oxygen Reduction and Hydrogen Evolution Reactions (in Japanese)" Zairyo to Kankyo (Corr.Engng.Jpn.). 47 (in press). (1998)

K.Tachibana、M.Abe 和 S.Nakayama：“Inconel 600 合金在氧还原和析氢反应中的特殊性（日语）”Zairyo to Kankyo (Corr.Engng.Jpn.)。