利用循環伏安法在具有高孔隙率及表面積特性的三維交聯網格結構泡沫鎳陰極(foam-Ni)上，電沉積製備二氧化錳修飾層的泡沫鎳陰極 (foam-Ni/MnO2) 後，再利用定電流方法電沉積鈀金屬於此電極上，製作同時具有二氧化錳和鈀金屬修飾的泡沫鎳電極 (foam-Ni/MnO2/Pd)，並且將其應用於電催化降解苯酚廢水。
透過循環伏安法、SEM以及EDS mapping對foam-Ni/MnO2/Pd電極進行電極製備之實驗參數最佳化、形貌和元素分析。透過循環伏安法分析和SEM，觀察到掃描速率為0.025 Vs-1 ~ 0.05 Vs-1時二氧化錳的形貌為不規則相連奈米片狀結構，並且可最佳化掃描圈數，得到最大之氧化峰電流，其中0.04 Vs-1及0.05 Vs-1 在最佳化掃描圈數 (分別為11、10圈) 後有相近的Ip值；在掃描速率大於0.075 Vs-1時結構會有明顯的空洞，不利於後續鈀沉積，結果顯示氧化峰電流與奈米片狀結構完整性有正相關。鈀金屬修飾的形貌分析觀察到，在泡沫鎳骨架的平面區為小型的鈀顆粒沉積，而在曲面區則是形成大小約228 nm的球型鈀團簇或是聚集型的鈀生成，且鈀容易在二氧化錳不規則相連奈米片狀結構的裂縫中生長成球型的鈀團簇，大小約為160 nm。在催化降解苯酚方面，使用foam-Ni/MnO2/Pd陰極降解苯酚，當電流密度為2 mA/cm2時，可在2小時內達到91.6%的苯酚降解率；與僅修飾二氧化錳或鈀的泡沫鎳陰極比較，顯示其擁有更高的催化苯酚降解能力。透過二氧化錳薄層將foam-Ni/MnO2/Pd陰極上之鈀金屬進行固定，製成foam-Ni/MnO2/Pd/MnO2，能減少鈀金屬於清洗過程中的流失，提高陰極重複使用的能力，同時也能保有與foam-Ni/MnO2/Pd陰極相近的催化苯酚降解效能。

Foam nickel electrode (foam-Ni) modified with manganese dioxide and palladium metal (foam-Ni/MnO2/Pd) was made by two electrodeposition steps. First, electrodeposition of manganese dioxide on a three-dimensional cross-linked foam nickel electrode with high porosity and surface area by cyclic voltammetry (CV), then use constant current method to electrodeposit palladium metal on the electrode.
Foam-Ni/MnO2/Pd electrodes have been characterized by using CV, SEM and EDS mapping to optimize the experiment parameters. Foam-Ni/MnO2/Pd cathode catalyzes the degradation of phenol. Apply a current with current density 2 mA/cm2 for 2 hours on phenol wastewater, the degradation rate of phenol reached 91.6%, compared with the foam-Ni modified only with manganese dioxide or palladium, the results show it has a higher ability to catalyze the degradation of phenol. The palladium on the foam-Ni/MnO2/Pd cathode is immobilized through a thin layer of manganese dioxide (foam-Ni/MnO2/Pd/ MnO2), which can reduce the loss of palladium in the cleaning process to improve the electrode reusability, while maintaining similar phenol degradation efficiency to foam-Ni/MnO2/Pd cathode.

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