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題 名 | Hydrophobic Effect of PTFE-Modified Ruthenium Oxide Electrodes for Oxygen Evolution in Alkaline Solution=PTFE修飾二氧化釕電極在鹼性溶液中氧氣析出之疏水性效應 |
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作 者 | 謝登存; 黃炳照; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 28:1 1997.01[民86.01] |
頁 次 | 頁9-19 |
分類號 | 341.37 |
關鍵詞 | 二氧化釕電極; 鹼性溶液; 氧氣; 疏水性; Ruthenium oxide; Oxygen evolution; PTFE-Modification; |
語 文 | 英文(English) |
中文摘要 | 本文藉由接觸角、表面形態及電化學特性來研究PTFE修飾二氧化釕電極在氧氣析出的疏水性效應。PTFE修飾二氧化釕電極的疏水性是由接觸角度計來量測,電極的表面形態是由電子顯微鏡及原子力顯微鏡來觀察,電極PTFE含量在電化學特性之效應則是由伏安電量、極化行為及交流阻抗來量測。結果顯示氧氣析出行為及電極的效能明顯受到電極疏水性影響,在低過電位時以含11.1 vol% PTFE塗膜液製備得之電極有最高的析氧活性位址數目及位址活性,其析氧效能最好;高過電位時則以20 vol% PTFE塗膜液製備得之電極有最高之位址活性。由交流阻抗分析指出高PTFE含量的電極因膜阻力較大會阻礙電極水合的進行且膜的阻力較大。 |
英文摘要 | The hydrophobic effects of PTFE-modified RuO₂ electrodes for oxygen evolution were explored in this study from the investigations of contact angle, morphology and electrochemical characteristics. The hydrophobicity ofelectrodes was measured by the contact angle, cyclic voltammetry and ac-impedance of PTFE-modified RuO₂ electrodes. The morphologies of electrodes with various amount of PTFE were observed by using of SEM and AFM. The effects of PTFE-content on the electrochemical characteristics of PTFE-modified electrodes were carried out by the measurements of voltammetric charge, polarization and ac-impedance. The behavior of oxygen evolution and the performance of electrodes depended significantly on the hydrophobicity of PTFE-modified electrodes, and the electrode prepared from a dipping solution with 11.1% PTFE has the best performance, i.e., the largest number of active sites and the highest site activity at low overpotential. The electrode prepared from a dipping solution with 20 vol% PTFE behaved the highest site activity at high overpotential. The facts that electrodes with higher PTFE-content retarded hydration of the electrode and processed a larger film resistance were also found, as indicated from the ac-impedance analysis, in this study. |
本系統中英文摘要資訊取自各篇刊載內容。