钯
浸出(土壤学)
催化作用
材料科学
乙二醇
铂金
化学
核化学
有机化学
土壤科学
土壤水分
环境科学
作者
Jucai Wei,Yulin Huang,Xiaoyin Wu
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2022-06-01
卷期号:169 (6): 063520-063520
被引量:7
标识
DOI:10.1149/1945-7111/ac790c
摘要
In this research, a simple and economical process based on hydrometallurgy is developed to directly recycle platinum group metals from spent automotive catalysts to synthesize carbon supported platinum-group metals catalysts. Spent automotive catalysts are firstly leached by HCl+H 2 O 2 system, resulting in Pd chloro-complexes. The optimized leaching rates of Pd and Rh are 97.99 ± 2.64% and 87.70 ± 1.23%, respectively. Then Pd precursor is separated from the leaching solution by precipitation, which can remove most impurities. The Pd precursor or Pd chloro-complexes solution can be used to synthesize carbon supported catalysts directly via an ethylene glycol reduction method. The samples are characterized by SEM, TEM, XRD, EDS, and ICP-OES. 2–4 nm Pd/C are successfully synthesized using recycled Pd. The recycled Pd/C exhibits excellent long-term stability, with no activity loss in the homemade SO32c depolarized electrolyser after 150 h of 100 mA cm −2 electrolysis. The electrochemical tests indicate that the recycled Pd/C samples are not inferior to Pd/C prepared from (NH 4 ) 2 PdCl 4 reagent.
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