Nanoporous Cu Prepared through Dealloying by Selectively Etching an Alkaline Metal with Saline
Nanoporous Cu Prepared through Dealloying by Selectively Etching an Alkaline Metal with Saline
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DOI：
10.1021/acsanm.3c00320
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发表时间：
2023-04-20
影响因子：
5.9
通讯作者：
Yamada，Shunsuke
中科院分区：
文献类型：
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作者：
Yamada，Shunsuke
采用一种简便、温和、快速的去合金化方法，以氯化铵（NH 4Cl）为腐蚀剂，Mg为牺牲金属，合成了纳米多孔Cu。Mg和Cu的标准电极电位（分别为-2.36和+0.34 V）之间的巨大差异导致在10 nm/min和303 K下的快速蚀刻。去合金化15分钟产生纳米多孔Cu箔，表现出24.1 m2/g的比表面积。原料Mg和NH 4Cl天然丰富; Mg被归类为可生物降解的金属，而NH 4Cl被美国食品和药物管理局认定为安全材料。脱合金过程中无有害副产物产生。因此，所提出的去合金化方法是环境友好的，并且解决了通过常规电化学去合金化方法产生的危险化学废物的问题。
A facile, benign, and rapid dealloying method was employed to synthesize nanoporous Cu using an ammonium chloride (NH4Cl) saline solution and Mg as an etchant and a sacrificial metal, respectively. The large difference between the standard electrode potentials of Mg and Cu (−2.36 and +0.34 V, respectively) resulted in rapid etching at 10 nm/min and 303 K. Dealloying for 15 min yielded a nanoporous Cu foil, exhibiting a specific surface area of 24.1 m2/g. The raw materials Mg and NH4Cl are naturally abundant; Mg is classified as a biodegradable metal, while NH4Cl is recognized as a safe material by the United States Food and Drug Administration. No harmful byproducts were produced during dealloying. Therefore, the proposed dealloying method is environmentally benign and addresses the issue of the hazardous chemical waste produced via conventional electrochemical dealloying methods.