离子液体
铂金
环境友好型
质子交换膜燃料电池
浸出(土壤学)
催化作用
电化学
化学
化学工程
无机化学
氯化物
材料科学
电极
有机化学
土壤科学
土壤水分
物理化学
工程类
生物
环境科学
生态学
作者
Maxime Balva,Sophie Legeai,Nathalie Leclerc,Emmanuel Billy,Eric Meux
出处
期刊:Chemsuschem
[Wiley]
日期:2017-06-22
卷期号:10 (14): 2922-2935
被引量:16
标识
DOI:10.1002/cssc.201700456
摘要
Abstract The platinum nanoparticles used as the catalyst in proton exchange membrane fuel cells (PEMFCs) represent approximately 46 % of the total price of the cells for a large‐scale production, and this is one of the barriers to their commercialization. Therefore, the recycling of the platinum catalyst could be the best alternative to limit the production costs of PEMFCs. The usual recovery routes for spent catalysts containing platinum are pyro‐hydrometallurgical processes in which a calcination step is followed by aqua regia treatment, and these processes generate fumes and NO x emissions, respectively. The electrochemical recovery route proposed here is more environmentally friendly, performed under “soft” temperature conditions, and does not result in any gas emissions. It consists of the coupling of the electrochemical leaching of platinum in chloride‐based ionic liquids (ILs), followed by its electrodeposition. The leaching of platinum was studied in pure ILs and in ionic‐liquid melts at different temperatures and with different chloride contents. Through the modulation of the composition of the ionic‐liquid melts, it is possible to leach and electrodeposit the platinum from fuel‐cell electrodes in a single‐cell process under an inert or ambient atmosphere.
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