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Temporally Decoupled Ammonia Splitting by a Zn–NH3 Battery with an Ammonia Oxidation/Hydrogen Evolution Bifunctional Electrocatalyst as a Cathode
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2024-03-07 , DOI: 10.1021/jacs.4c00369 Yangyang Feng 1, 2 , Lanting Huang 1, 2 , Zhiwei Xiao 2 , Xu Zhuang 1, 2 , Tayyab Sohail Aslam 2 , Xiang Zhang 2 , Yan-Xi Tan 2 , Yaobing Wang 2, 3, 4
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2024-03-07 , DOI: 10.1021/jacs.4c00369 Yangyang Feng 1, 2 , Lanting Huang 1, 2 , Zhiwei Xiao 2 , Xu Zhuang 1, 2 , Tayyab Sohail Aslam 2 , Xiang Zhang 2 , Yan-Xi Tan 2 , Yaobing Wang 2, 3, 4
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Ammonia splitting to hydrogen is a decisive route for hydrogen economy but is seriously limited by the complex device and low efficiency. Here, we design and propose a new rechargeable Zn–NH3 battery based on temporally decoupled ammonia splitting to achieve efficient NH3-to-H2 conversion. In this system, ammonia is oxidized into nitrogen during cathodic charging (2NH3 + 6OH– → N2 + 6H2O + 6e–) with external electrical energy conversion and storage, while during cathodic discharging, water is reduced to hydrogen (2H2O + 2e– → H2 + 2OH–) with electrical energy generation. In this loop, continuous and efficient H2 production without separation and purification is achieved. With the help of the ammonia oxidation reaction (AOR) and hydrogen evolution reaction (HER) bifunctional catalyst of Mo2C/NiCu@C, a rechargeable Zn–NH3 battery is realized that exhibits a high NH3-to-H2 FE of 91.6% with outstanding durability for 900 cycles (300 h) at 20 mA/cm2, enabling efficient and continuous NH3-to-H2 conversion.
中文翻译：
以氨氧化/析氢双功能电催化剂为阴极的 Zn-NH3 电池暂时解耦氨分解
氨分解制氢是氢经济的决定性途径，但其装置复杂且效率低下，严重限制了其发展。在这里，我们设计并提出了一种基于暂时解耦氨分解的新型可充电 Zn-NH 3电池，以实现高效的 NH 3到 H 2的转化。在该系统中，氨在阴极充电过程中被氧化成氮气(2NH 3 + 6OH – → N 2 + 6H 2 O + 6e – )，并通过外部电能转换和储存，而在阴极放电过程中，水被还原为氢气(2H 2 O + 2e – → H 2 + 2OH – ) 产生电能。在此循环中，无需分离和纯化即可实现连续且高效的H 2生产。借助Mo 2 C/NiCu@C的氨氧化反应（AOR）和析氢反应（HER）双功能催化剂，实现了具有高NH 3 -to-H 2 FE的可充电Zn-NH 3电池91.6%，在 20 mA/cm 2下具有 900 次循环（300 小时）的出色耐久性，实现高效、连续的 NH 3到 H 2转化。
更新日期：2024-03-07
中文翻译：
以氨氧化/析氢双功能电催化剂为阴极的 Zn-NH3 电池暂时解耦氨分解
氨分解制氢是氢经济的决定性途径，但其装置复杂且效率低下，严重限制了其发展。在这里，我们设计并提出了一种基于暂时解耦氨分解的新型可充电 Zn-NH 3电池，以实现高效的 NH 3到 H 2的转化。在该系统中，氨在阴极充电过程中被氧化成氮气(2NH 3 + 6OH – → N 2 + 6H 2 O + 6e – )，并通过外部电能转换和储存，而在阴极放电过程中，水被还原为氢气(2H 2 O + 2e – → H 2 + 2OH – ) 产生电能。在此循环中，无需分离和纯化即可实现连续且高效的H 2生产。借助Mo 2 C/NiCu@C的氨氧化反应（AOR）和析氢反应（HER）双功能催化剂，实现了具有高NH 3 -to-H 2 FE的可充电Zn-NH 3电池91.6%，在 20 mA/cm 2下具有 900 次循环（300 小时）的出色耐久性，实现高效、连续的 NH 3到 H 2转化。
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