水熱法合成CuFe片狀氫氧化物觸媒於 水電解產氫之研究

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唐逸軒(I-Hsuan Tang) 查詢紙本館藏

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能源工程研究所

論文名稱

水熱法合成CuFe片狀氫氧化物觸媒於水電解產氫之研究
(Hydrothermal Synthesis of CuFe-Layered Double Hydroxides Electrocatalysts for Water Splitting)

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摘要(中)

開發出具有雙功能催化效果與低成本的水電解產氫之觸媒一直是重要的研究主題，如何提高觸媒的催化活性是當前需解決之問題。本研究提出以過渡金屬Cu與Fe合成具有雙功能之片狀氫氧化物(Layered double hydroxides, LDHs)觸媒。使用水熱法進行觸媒之製備，並將研究分為三階段，從基材的選擇到前驅物溶液的條件優化，最後進行CuFe-LDHs觸媒比例的最佳化，透過表面形貌分析、元素成分分析以及電化學量測對CuFe-LDHs觸媒進行分析與探討。
本研究成功製備CuFe-LDHs觸媒於鎳金屬多孔材表面，從SEM圖得到比例1:1的CuFe-LDHs觸媒具有良好的披覆性與高表面積的片狀結構。在析氫與析氧反應中，皆表現優異的性能 (HER：170 mV@ 10 mA/cm2，Tafel斜率為102 mV/dec；OER：1.57 V@ 10 mA/cm2，Tafel斜率為50 mV/dec)，經由10小時長時間穩定性測試，觸媒性能只衰減0.6 %，上述結果顯示成功製備出具有雙功效之水電解觸媒。

摘要(英)

The development of a low-cost catalyst with dual-functional catalytic effects for water electrolysis to produce hydrogen has been an important research topic. How to improve the catalytic activity of the catalyst is particularly important. In this study, we propose to use transition metals Cu and Fe to synthesize a dual-functional layered double hydroxides (LDHs) catalyst. The hydrothermal method was used for the catalyst preparation. This study includes three stages, from the selection of the substrate to the optimization of the conditions of the precursor solution, and finally the optimization of the CuFe-LDHs catalyst ratio. Surface morphology analysis, elemental composition analysis and electrochemical measurement were used to analyze and explore CuFe-LDHs catalyst.
In this study, CuFe-LDHs catalysts were successfully prepared on the surface of nickel foam. The CuFe-LDHs catalyst with a ratio of 1:1 from the SEM image has good coverage and high surface area. Excellent performance in both hydrogen evolution and oxygen evolution reactions (HER: 170 mV @ 10 mA/cm2, Tafel slope 102 mV/dec; OER: 1.57 V@10 mA/cm2, Tafel slope 50 mV/dec). And the catalyst performance is only attenuated by 0.6 % through a 10-hour long-term stability test. The results show that water electrocatalysts with double efficacy can be successfully prepared.

關鍵字(中)

★ LDHs觸媒
★ 水熱法
★ 水電解產氫
★ 析氫反應
★ 析仰反應

關鍵字(英)

★ LDHs catalyst
★ Hydrothermal method
★ Water electrolysis
★ HER
★ OER

論文目次

中文摘要 i
Abstract ii
誌謝 iii
目錄 v
圖目錄 viii
表目錄 xii
符號說明 xiii
第一章緒論 1
1-1 前言 1
1-2 氫能 2
1-3 產氫技術 3
1-4 研究動機與目的 5
第二章基礎理論與文獻回顧 7
2-1 水電解產氫之基本原理 7
2-2 水電解理論電壓 8
2-3 法拉第電解定律 9
2-4 析氫反應與析氧反應 9
2-4-1 析氫反應 9
2-4-2 析氧反應 11
2-5 文獻回顧 12
2-5-1 非貴金屬觸媒 12
2-5-2 過渡金屬觸媒 15
2-5-3 層狀雙氫氧化物(LDH)觸媒材料 16
第三章實驗方法 19
3-1實驗架構與實驗藥品 19
3-2 水熱法合成 21
3-3 LDH電極製備 21
3-4 電化學分析 22
3-4-1 線性掃描伏安法 23
3-4-2 交流阻抗分析 23
3-4-3 長時間穩定性 24
3-5 表面形貌分析 24
3.5.1 場發式電子顯微鏡 25
3.6 元素分析 25
3-6-1 X光繞射儀 25
3-6-2 X光光電子能譜儀 25
第四章結果與討論 27
4-1 基材對CuFe觸媒的影響 27
4-1-1 表面形貌分析 27
4-1-2 析氫反應之分析 30
4-1-3 析氧反應之分析 36
4-2 改變水熱合成之pH值對CuFe-LDHs觸媒的影響 41
4-2-1 表面形貌分析 42
4-2-2 不同尿素比例之析氫反應分析 42
4-2-3 不同尿素比例之析氧反應分析 45
4-3 不同比例之CuFe-LDHs觸媒性能探討 48
4-3-1 表面形貌分析 48
4-3-2 表面元素分析 49
4-3-3 不同比例之CuFe-LDHs觸媒於析氫反應分析 50
4-3-4 不同比例之CuFe-LDHs觸媒於析氧反應分析 53
4-3-4 CuFe-LDHs觸媒穩定性分析 56
第五章結論與未來方向 60
5-1結論 60
5-2未來方向 61
參考文獻 62

參考文獻

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指導教授

曾重仁(Chung-Jen Tseng)

審核日期

2018-8-17

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