Activation of Carbon Materials by Plasma Processing and Industrial Application

碳材料的等离子体加工活化及其工业应用

• 批准号: 07650780
• 负责人: HORITA Kiyoshi
• 金额: $ 1.34万
• 依托单位: Fukui University
• 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-07650780/
• 关键词: Plasma processing; Carbon black; Oxygen electrode; Surface modification; カーボンブラック

We have investigated the surface properties which are electric conductivity, wettability, surface functional groups, and rate constant of H_2O_2 decomposition of surface modified acetylene black (AB) by low temperature oxygen plasma of dc glow discharge. This work also describes the relations between the surface properties and the electrochemical behavior in an aqueous KOH solution of the gas diffusion electrodes with oxygen plasma processed AB.The results are as follows ; the conductivity of AB decreases with processing time, the AB surface changes from hydrophobic to hydrophilic, and the processing enhances the H_2O_2 decomposition ability of AB.These facts would be explained by the increase of oxygen functionalities such as aromatic -OH,>C=O,-COOH etc.of AB surface. The polarization and discharge behavior of oxygen electrode with AB have been much improved by the plasma processing. These can be regarded as forming the stable three phase zone owing to adequate wettability, high H_2O_2 decomposition ability, and developed fine pore of the AB electrode. From experiments using a rotating ring disk electrode, it can be concluded that oxygen electrode reaction on AB surface is a two electron reaction forming H_2O_2 as an intermediate.

本文研究了直流辉光放电低温氧等离子体对表面改性乙炔黑（AB）的导电性、润湿性、表面官能团和H_2O_2分解速率常数等表面性质的影响。本文还研究了氧等离子体处理AB的气体扩散电极的表面性质与电极在KOH水溶液中的电化学行为之间的关系。AB的电导率随处理时间而降低，AB表面由疏水性变为亲水性，这可能是由于AB表面的芳香-OH、>C=O、-COOH等含氧官能团增加所致。经等离子体处理后，AB型氧电极的极化和放电性能得到了很大的改善。由于AB电极具有良好的润湿性、较高的H_2O_2分解能力和发达的细孔结构，形成了稳定的三相区。用旋转环盘电极进行的实验表明，氧电极在AB面上的反应是一个以H_2O_2为中间体的双电子反应。

项目成果

K.Horita et al: "Oxygen Plasma Processing onto Carbon Black Surface for Gas Diffusion Electrode of Fuel Cell" TANSO. No.165. 255-260 (1994)

K.Horita 等人：“燃料电池气体扩散电极炭黑表面的氧等离子体处理”TANSO。

K. Horita: "Oxgen Plasma Processing on-to Carbon Black Surface for Gas Diffusion Electrode of Fuell Cell" TANSO. 165. 255-260 (1994)

K. Horita：“燃料电池气体扩散电极炭黑表面的氧等离子体处理”TANSO。

K. Horita: "Surface Modification of Carbon Black by Anodic Oxidation and Electrochemical Characterization" CARBON. 34. 217-222 (1996)

K. Horita：“通过阳极氧化和电化学表征对炭黑进行表面改性”CARBON。

K.Horita et al: "Surface Modification of Acetylene Black by Oxygen Plasma Processing and Application to Gas Diffusion Electrode" Nippon Kagaku Kaishi. No.6. 512-517 (1994)

K.Horita 等人：“通过氧等离子体处理乙炔黑的表面改性及其在气体扩散电极上的应用”Nippon Kagaku Kaishi。

K.Horita: "Surface Modification of Carbon Black by Anodic Oxidation and Electrochemical Characterization" CARBON. 34・2. 217-222 (1996)

K.Horita：“通过阳极氧化和电化学表征对炭黑进行表面改性”CARBON 34・2（1996）。