• 作者： Hu, Chi-Chang; Chen, Chung-Ann
• 中文摘要： 利用擬穩態極化方法和循環伏安法, 在鹼性環境下, 對熱燒結所製備的鈷系尖晶石氧化物披覆電極的氧氣產生活性和伏安行為進行研究。結果發現此一系列電極中, 出現在氧氣產生之前的氧化還原對之峰電位, 會隨著銅離子的莫耳分率增加而往正電位方向偏移; 同時,氧氣產生之塔弗斜率亦隨之上升。它們對氧氣產生反應的比活性(電觸媒活性)也隨著銅含量的增加而增加, 由此可推論氧化物晶格中各陽離子有密切混合的情形。這些氧化物的結構性質(包括表面型態,組成, 和結晶性)則採用掃描式電子顯微鏡, 能量分散x光譜, 和x光繞射分析儀進行分析。
• 英文摘要： The oxygen evolving activity and voltammetric behavior of the spinel Ni/sub 1-x/Cu/sub x/Co/sub 2/O/sub 4//Ti electrodes prepared by thermal decomposition were investigated in an alkaline medium using the pseudo-steady- state polarization technique and/or cyclic voltammetry(CV). On this series of electrodes, a positive shift in peak potentials of the redox pair prior to the oxygen evolution reaction (OER) and an increase in Tafel slopes of the OER were found with increasing the molar percentage(m/o) of Cu/sup 2+/. Their specific activity, i/q/sup */,(i.e., electrocatalytic activity) for the OER was also increased with increasing the m/o of Cu/sup 2+/, indicating the intimate mixing of the cations within the oxide matrix. The textural properties (including morphology, composition, and crystallite) of these oxides obtained from the scanning electron microscope (SEM), energy-dispersive x-ray (EDX), and x-ray diffraction (XRD) analysis were also investigated.
• 中文關鍵字： 尖晶石氧化物; 氧氣產生反應; 伏安行為; 比活性
• 英文關鍵字： Spinel Oxide; Oxygen Evolution Reaction; Voltammetric Behavior; Specific Activity