水電解製臭氧技術中陽極老化因素之探究

Anode Degradation Investigation of Ozone Generation via Water Electrolysis

林佳弘(Chia-Hung Lin)

指導教授 ： 鐘國濱

元智大學/工程學院/機械工程學系/碩士(2008年)

https://doi.org/10.6838/YZU.2008.00142

摘要

以商購二氧化鉛粉末自製水電解生成臭氧之膜電極組陽極材料，藉以探討其效能為本研究重點。不論自製亦或商購膜電極組，一旦運作過程中中斷電流將導致性能明顯衰退，而性能回復也因電流重新啟動而逐漸回復。參考文獻做法，數項參數被引進此一研究過程輔以多項貴儀測試，期以初步了解此一現象。此外，本研究更投入二氧化鉛粉末自製，藉以發掘自製與商購粉末晶格結構差異與水電解效能的影響。根據X光繞射分析與熱重分析結果，電流中斷將導致氧化鉛之晶格發展更趨穩定，而此將不利於電化學臭氧之生成。另外，研究過程中發現，水電解過程中所產生之氫氧自由基會攻擊膜材與觸媒而導致永久性衰退。

關鍵字

水電解 ； 臭氧生成 ； 陽極老化

並列摘要

In this study, home-made membrane electrode assemblies (MEA) with commercial PbO2 powder were used to investigate their capacity as anode in ozone generation via water electrolysis. We found that degrade phenomena happened for current interruption during operation period for both home-made and commercial MEA and the recovery goes gradually along with current input once more. To investigate this degradation and recovery phenomena roughly, several operation parameters were used accordingly, accompany with XRD, TGA and SEM analysis. Further, PbO2 powders were synthesized and their crystalline structures before and after current interruption were compared with those MEA made from commercial powders. According to XRD and TGA analysis, current interruption results in well-developed crystalline structure of PbO2, and this is harmful for electrochemical ozone generation. Also, we found that generation of OH radial during water electrolysis will attack membrane and catalyst and result in MEA permanent degradation.

並列關鍵字

water electrolysis ； ozone ； PbO2

參考文獻

【20】卓敏貴，「氧氣端電極觸媒物種對URFC特性之研究」，元智大學，碩士論文，2006。

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