太陽能和風能等自然資源被認為是提供安全，清潔和可持續能源以滿足本世紀全球需求的潛在資源。然而，自然能源間歇性地出現並且需要有效且經濟的存儲解決方案，水分解是將間歇性能量轉換為氫能的一種有吸引力的解決方案，其中太陽能是通過太陽能電池或光電化學電池收集的，以間接或直接的方式通過驅動水電解來產氫。為了有效地進行水分解，減輕氧釋放反應(Oxygen Evolution Reaction OER)的阻力非常重要，穩定的OER催化劑與高度光激發的光催化劑相匹配，有望實現可行且可擴展的儲能技術。
為了實現這一目標，將氧化銥（IrOx）和氧化鋅（ZnO）分別在FTO上電絮凝，分別充當電催化劑和光催化劑，以進行光電化學水分解，在電絮凝期間，以高氧化電位施加FTO，其中進行水氧化以產生質子，從而將含金屬的前體酸化為金屬氧化物，所製備的氧化銥-氧化鋅(IrOx-ZnO)複合物在AM 1.5光照下可有效驅動水分解反映。為了深入了解光電催化水氧化反應(OER)，通過掃描電子顯微鏡、穿透射電子顯微鏡對氧化銥-氧化鋅複合物進行了表徵，其特徵在於前體濃度，電絮凝時間，退火溫度等，還通過紫外光-可見光吸收光譜和光致發光光譜法評價了氧化銥-氧化鋅複合物的電子-電洞對的帶隙。

The nature resources such as solar and wind are considered as the potential sources to offer safe, clean, and sustainable energy to meet the global demand in the present century. However, the nature energy appears intermittently and requires efficient and economic storage solutions. Water splitting is an attractive solution to convert the intermittent energy to hydrogen energy,1 in which solar energy is harvested by either solar- or photoelectrochemical- cells to drive water electrolysis with hydrogen production in indirect or direct routes. To have efficient water splitting, mitigating the resistance of oxygen evolution reaction (OER) is of significance. A stable OER catalyst suiting with a highly photoexcited photocatalyst is anticipated to enable viable and scalable energy storage technology. Aiming this goal, iridium oxide (IrOx) and zinc oxide (ZnO) were electroflocculated on FTO sequentially acting as electro- and photo-catalyst, respectively, to exert photoelectrochemical water splitting. During the electroflocculation, FTO was applied at high oxidation potentials, in which water oxidation was carried out to yield proton substantially to acidize metal-containing precursors to metal oxides. The as-prepared IrOx-ZnO hybrid was demonstrated to drive water splitting efficiently under AM 1.5 illuminations. To gain an insight into understanding the photocatalytic OER, the IrOx-ZnO hybrid was characterized by scanning electron microscopy, transmission electron microscopy, as functions of concentration of precursor, period of electrofloccuation, annealing temperature, etc. Band gap and recombination rate of electron-hole pair of the crystalline ZnO and IrOx-ZnO hybrid were also evaluated by UV-visible diffuse reflectance spectroscopy and photoluminescence spectroscopy.

謝誌
中文摘要
目錄
圖目錄
表目錄
第一章 緒論
1.1氫能源，分離式能源系統
1.2光電解水產生氫氣
1.3光電解水陽極材料
1.4氧化鋅光觸媒的特性及製備
1.5電絮凝方法製備氧化銥
第二章 材料與方法
2.1實驗藥品與試劑
2-2實驗儀器
2-3合成含銥前驅物
2-4合成含鋅前驅物
2-5電極製備
2-6沉積物鑑定
2-7光電催化水氧化反應測試
第三章 結果與討論
3.1室溫Zn(OH)₄²⁻前驅物合成原理
3.2氧化銥-氧化鋅複合物電極製備
3.3氧化銥-氧化鋅複合物電極光電催化反應
3.4製備氧化銥-氧化鋅複合物電極條件優化
3.5複合物形貌之影響
3.6複合物結晶性之影響
3.7鍛燒溫度對複合物能隙之影響
3.8鍛燒溫度對氧空位之影響
第四章 結論

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