海水電解作為實現大規模氫氣生產的可持續技術，已被廣泛認為是一種潛力巨大的綠色能源解決方案，尤其是在全球能源轉型和碳中和目標日益迫切的背景下。然而，儘管其具有可持續發展的優勢，海水電解在實際應用中面臨著一系列技術挑戰，尤其是由氯離子引發的腐蝕問題以及電催化劑的穩定性不足，這些挑戰限制了其長期運行的可行性。金屬有機框架 (Metal-Organic Framework, MOFs)，特別是以鈷為中心的咪唑鹽類框架 (Co-Imidazolate Frameworks, CoZNS)，由於其出色的高比表面積、豐富的金屬離子活性位點和抗氯性，展現了極大的潛力，成為電催化領域中一個具有前景的材料選擇。
本研究提出了一種創新的方法，成功合成了具有雙功能二維複合材料電催化劑，該催化劑由二維 CoZNS 和片狀二硫化鉬 (Molybdenum Disulfide, MoS2) 通過水熱反應即可原位生長於鎳泡沫 (Ni Foam, NF) 基板上，形成了 CoZMNS@NF 複合材料。這獨特的二維奈米片結構不僅有效暴露了大量的活性位點，還能加速電荷分離，進一步促進了質傳過程，顯著提高了整體反應動力學。這種新型的複合結構不僅提高了催化性能，還解決了傳統材料在電解過程中面臨的穩定性問題，進一步擴展了海水電解技術的應用前景。
在三電極系統中測試催化劑的電催化表現時，CoZMNS@NF 催化劑在電流密度為 10 mA/cm2 的條件下，對於產氫反應 (Hydrogen Evolution Reaction, HER) 與產氧反應 (Oxygen Evolution Reaction, OER) 分別展現出 -0.187 V 及 1.440 V 的過電位。更值得一提的是，在雙電極系統中，當施加 1.631 V 的電壓時，該催化劑可穩定運作至少 80 小時，展現出優異的長期穩定性與抗氯腐蝕能力。這些實驗結果顯示，CoZMNS@NF 具備作為高效、穩定且可長時間運作之海水電解催化劑的潛力，為實現無需依賴純水的大規模綠氫製造提供了具體可行的技術方案，對於推動永續能源的發展具有重要的學術與應用價值。

Seawater electrolysis presents a sustainable pathway for large-scale hydrogen production, though its practical deployment is hindered by challenges such as chloride-induced corrosion and catalyst instability. Metal-organic frameworks (MOFs), particularly Co-imidazolate frameworks, have shown significant promise as electrocatalysts due to their high surface area, abundant active sites, and ability to resist chloride ion interference. In this work, we report the synthesis of a two-dimensional, durable, bifunctional electrocatalyst through a hydrothermal process, in which a cobalt-imidazolate framework (CoZNS) and molybdenum disulfide (MoS2) composite are in-situ synthesized on nickel foam (NF), yielding CoZMNS@NF. The tailored nanosheet architecture exposes a high density of active sites, promotes efficient charge separation, and facilitates mass transport, thereby enhancing overall reaction kinetics. The CoZMNS@NF catalyst demonstrates low overpotentials of -0.187 V for hydrogen evolution and 1.440 V for oxygen evolution at a current density of 10 mA/cm2. Notably, CoZMNS@NF maintains stable operation in real seawater for over 80 hours at an applied voltage of 1.631 V, exhibiting exceptional durability and chloride tolerance. These results highlight CoZMNS@NF as a promising electrocatalytic platform for efficient, long-term seawater electrolysis, offering a scalable route to green hydrogen production without reliance on purified water.

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