{"title":"泡沫镍海水电解用多组分分层Ni(OH)2/NiFe2O4/Ni3S2纳米片","authors":"Menghan Zhao, Heng Sun, Meiyue Li, Yanshang Gong, Zhou Lu, Ding Yuan, Lixue Zhang, Jiankun Sun","doi":"10.1002/cnma.202500137","DOIUrl":null,"url":null,"abstract":"<p>Developing highly efficient, durable, and easily available noble-metal electrocatalysts is crucial for large-scale seawater electrolysis but remains a challenge. Here, we report a high-performance oxygen evolution reaction (OER) catalyst, Ni(OH)<sub>2</sub>/NiFe<sub>2</sub>O<sub>4</sub>/Ni<sub>3</sub>S<sub>2</sub>@NF, synthesized through a simple one-step hydrothermal method, showcasing a low overpotential of 413 mV at a large current density of 1000 mA cm<sup>−2</sup>, coupled with excellent stability at an industrial current density of 500 mA cm<sup>−2</sup> for over 100 h in alkaline natural seawater solution. 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引用次数: 0
摘要
开发高效、耐用、易得的贵金属电催化剂对大规模海水电解至关重要,但仍是一个挑战。在此,我们报道了一种高性能的析氧反应(OER)催化剂Ni(OH)2/NiFe2O4/Ni3S2@NF,通过简单的一步水热法合成,在1000 mA cm−2的大电流密度下具有413 mV的低过电位,并且在500 mA cm−2的工业电流密度下在碱性天然海水溶液中具有超过100 h的优异稳定性。如此优异的OER性能归功于Ni(OH)2/NiFe2O4/Ni3S2@NF催化剂丰富的成分和层叠结构,具有互连纳米片阵列的三维多孔结构,赋予了更多的活性位点,促进了高效的质量传递,进一步显著提高了催化活性和反应动力学。以Ni(OH)2/NiFe2O4/Ni3S2@NF为阳极,以MoNi@NF为阴极的负离子交换膜水电解槽(AEMWE)在碱性海水中表现出优异的活性和稳定性,在2.35 V的低电池电压下实现了1000 mA cm - 2的工业电流密度。这项工作为开发具有成本效益和坚固耐用的OER电催化剂提供了有价值的见解,适合在恶劣的海水电解系统中稳定运行。
Multicomponent and Hierarchical Ni(OH)2/NiFe2O4/Ni3S2 Nanosheets on Nickel Foam for Seawater Electrolysis
Developing highly efficient, durable, and easily available noble-metal electrocatalysts is crucial for large-scale seawater electrolysis but remains a challenge. Here, we report a high-performance oxygen evolution reaction (OER) catalyst, Ni(OH)2/NiFe2O4/Ni3S2@NF, synthesized through a simple one-step hydrothermal method, showcasing a low overpotential of 413 mV at a large current density of 1000 mA cm−2, coupled with excellent stability at an industrial current density of 500 mA cm−2 for over 100 h in alkaline natural seawater solution. Such excellent OER performance is attributed to the abundant component and hierarchical architecture of Ni(OH)2/NiFe2O4/Ni3S2@NF catalyst, featuring 3D porous structure of interconnected nanosheets array, which endows more active sites and promotes efficient mass transport, further significantly enhancing catalytic activity and reaction kinetics. The anion exchange membrane water electrolyzer (AEMWE), featuring a Ni(OH)2/NiFe2O4/Ni3S2@NF anode and a MoNi@NF cathode, exhibits exceptional activity and stability in alkaline seawater, achieving an industrial current density of 1000 mA cm−2 at a low cell voltage of 2.35 V. This work offers valuable insights for the development of cost-effective and robust OER electrocatalysts suitable for stable operation in harsh seawater electrolysis systems.
ChemNanoMatEnergy-Energy Engineering and Power Technology
CiteScore
6.10
自引率
2.60%
发文量
236
期刊介绍:
ChemNanoMat is a new journal published in close cooperation with the teams of Angewandte Chemie and Advanced Materials, and is the new sister journal to Chemistry—An Asian Journal.