电合成
钝化
材料科学
铝
氧化物
化学工程
镓
金属
电化学
图层(电子)
无机化学
电极
纳米技术
冶金
化学
物理化学
工程类
作者
Jiewei Zheng,Marcello B. Solomon,Aditya Rawal,Yuan Chi,Ruohan Yu,Li Liu,Jianbo Tang,Guangzhao Mao,Deanna M. D’Alessandro,Priyank V. Kumar,Md. Arifur Rahim,Kourosh Kalantar‐Zadeh
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-12-06
卷期号:17 (24): 25532-25541
标识
DOI:10.1021/acsnano.3c09472
摘要
The production of aluminum (Al) metal-organic frameworks (MOFs) by electrosynthesis using solid-state Al electrodes always faces significant challenges due to the formation of a passivating aluminum oxide layer in the process. Here, we developed a liquid-metal-based method to electrosynthesize an aluminum Al-MOF (MIL-53). This method uses a liquid-state gallium (Ga) anode as a reservoir and activator for a light metal, Al, in the form of Al-Ga alloys that releases Al3+ for the electrosynthesis of Al-MOFs. Introducing Ga into the system inhibits the formation of aluminum oxide passivation layer and promotes the electrochemical reaction for Al-MOF synthesis. The electrosynthesis using liquid Al-Ga alloy is conducted at ambient temperatures for long durations without requiring pretreatment for aluminum oxide removal. We show that the Al-MOF products synthesized from 0.40 wt % Al in liquid Ga lead to the highest crystallinity and possess a specific surface area greater than 800 m2 g-1 and a low capacity for CO2 adsorption that can be used as a potential matrix for CO2/N2 separation. This work provides evidence that employing liquid-metal electrodes offers a viable pathway to circumvent surface passivation effects that inevitably occur when using conventional solid metals. It also introduces an efficient electrosynthesis method based on liquid metals for producing atomically porous materials.
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