先進析氧高熵碳酸鹽電催化劑在陰離子交換膜海水電解器之應用;Advanced Oxygen Evolution High Entropy Carbonate Electrocatalyst for Application of Anion Exchange Membrane Seawater Electrolyzer

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Title:	先進析氧高熵碳酸鹽電催化劑在陰離子交換膜海水電解器之應用;Advanced Oxygen Evolution High Entropy Carbonate Electrocatalyst for Application of Anion Exchange Membrane Seawater Electrolyzer
Authors:	張育哲;Zhang, Yu-Zhe
Contributors:	化學工程與材料工程學系
Keywords:	海水電解;析氧反應;多元醇溶劑熱法;高熵電觸媒;碳酸鹽晶體結構;陰離子交換膜水電解器;Seawater electrolysis;oxygen evolution reaction (OER);polyol solvothermal synthesis;high entropy catalyst;carbonate crystal structure;anion exchange membrane water electrolyzer (AEMWE)
Date:	2025-07-21
Issue Date:	2025-10-17 11:18:21 (UTC+8)
Publisher:	國立中央大學
Abstract:	析氧反應 (OER) 在海水製氫方面有動力學緩慢、腐蝕程度高等挑戰，因此需開發出先進 OER 觸媒以加速氫能發展。本研究成功開發簡單的多元醇溶劑熱法用於合成 FeNiCoMnCr 高熵碳酸鹽催化劑。觸媒呈現均質的粉末顆粒、均勻的元素分佈，有利於為反應提供更多且穩定的活性位點，並促進高熵觸媒之協同效應以提升其電化學表現。在鹼性水中高熵觸媒表現出低過電位 (290 mV @ 10 mA/cm2) 與低塔菲爾斜率 (46.7 mV/dec)，即使在鹼性海水中亦僅略微上升至 316 mV, 51.9 mV/dec，並於連續 1000 小時操作下僅有 0.7% 的性能衰退，展現高熵觸媒之優異的催化活性與穩定性，超越現有國際期刊之指標。在完成高熵觸媒的開發後進行小型觸媒量產試驗，目前可在一批次下生產 6 g 觸媒粉末，並驗證了相同/不同的觸媒生產批次之催化活性與元素組成擁有極高的再現性，有助於提升未來大規模量產之開發。最後，將高熵觸媒應用於陰離子交換膜水電解器中，在 60°C 的鹼性水與鹼性海水下，其能量效率分別達到 87.4% 與 81.1%，運行 1000 小時後仍保持穩定，展現高熵觸媒的產業應用潛力與商業化可行性。;The oxygen evolution reaction (OER) in seawater electrolysis faces significant challenges, including sluggish reaction kinetics and severe corrosion, necessitating the development of advanced OER catalysts to facilitate the advancement of hydrogen energy technologies. In this study, a facile polyol solvothermal method was successfully developed for synthesizing FeNiCoMnCr high-entropy carbonate catalyst (HEC). The catalyst exhibited excellent electrocatalytic performance in alkaline media, achieving a low overpotential of 290 mV at 10 mA cm⁻² and a low Tafel slope of 46.7 mV dec⁻¹ in 1 M KOH. Even in 1 M KOH + seawater, the performance only slightly increased to 316 mV and 51.9 mV dec⁻¹, respectively. Long-term electrolysis for 1000 hours resulted in only 0.7% performance degradation, demonstrating superior catalytic activity and stability of HEC that surpasses many international journals benchmarks. Following the catalyst development, a small-scale production trial was conducted, achieving a yield of 6 g per batch. The catalytic activity and elemental composition were found to be highly reproducible across different batches, supporting the feasibility of future large-scale synthesis. Finally, integration of the high-entropy catalyst into an anion exchange membrane water electrolyzer (AEMWE) system demonstrated outstanding energy efficiencies of 87.4% in alkaline water and 81.1% in alkaline seawater at 60 °C. After 1000 hours of continuous operation, the system remained stable, indicating strong potential for industrial application and commercialization of high-entropy catalysts.
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] Electronic Thesis & Dissertation

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