从海水中电化学萃取高价镁（OH）2 并产生 H2 的疏固表面。

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-05-15 Epub Date: 2024-05-06 DOI:10.1021/acs.nanolett.4c01484

Li Yi, Xu Chen, Yingjie Wen, Haocheng Chen, Sixie Zhang, Hao Yang, Wenbo Li, Lihui Zhou, Beibei Xu, Wenwen Xu, Wanbing Guan, Sheng Dai, Zhiyi Lu

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引用次数: 0

摘要

直接电解海水过程中面临的一个重大挑战是，由于 Mg(OH)2 的大量缩放，阴极会迅速失活。在此，我们合成了一种铂涂层的高度无序镍铜合金（Pt-NiCu alloy）电极，它具有优异的疏固性能，可在富含 Mg2+ 和 Ca2+ 的电解质中稳定制氢（100 mA cm-2，>1000 h 的耐久性）并同时生产 Mg（OH）2（纯度>99.0%）。这种非传统的疏固特性主要源于镍铜合金基底的高表面能，它有利于表面水的吸附，从而迫使 Mg(OH)2 通过均匀成核大量形成。这种疏固电极的发现将彻底简化现有的海水电解技术，提高海水电解的经济可行性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Solidophobic Surface for Electrochemical Extraction of High-Valued Mg(OH)2 Coupled with H2 Production from Seawater.

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Solidophobic Surface for Electrochemical Extraction of High-Valued Mg(OH)₂ Coupled with H₂ Production from Seawater.

A significant challenge in direct seawater electrolysis is the rapid deactivation of the cathode due to the large scaling of Mg(OH)₂. Herein, we synthesized a Pt-coated highly disordered NiCu alloy (Pt-NiCu alloy) electrode with superior solidophobic behavior, enabling stable hydrogen generation (100 mA cm^-2, >1000 h durability) and simultaneous production of Mg(OH)₂ (>99.0% purity) in electrolyte enriched with Mg²⁺ and Ca²⁺. The unconventional solidophobic property primarily stems from the high surface energy of the NiCu alloy substrate, which facilitates the adsorption of surface water and thereby compels the bulk formation of Mg(OH)₂ via homogeneous nucleation. The discovery of this solidophobic electrode will revolutionarily simplify the existing techniques for seawater electrolysis and increase the economic viability for seawater electrolysis.

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.