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- W4242156522 abstract "The recovery of heavy metals from aqueous solutions or e-wastes is of upmost importance. Retrieval of Au, Ag, and Cu with electricity generation through building an ethanol-metal coupled redox fuel cells (CRFCs) is demonstrated. The cell was uniquely assembled on PdNi/C anode the electro-oxidation of ethanol takes place to give electrons and then go through the external circuit reducing metal ions to metallic on the cathode, metals are recovered. Taking an example of removal of 100 mg L−1 gold in 0.5 M HAc-NaAc buffer solution as the catholyte, 2.0 M ethanol in 1.0 M alkaline solution as the anolyte, an open circuit voltage of 1.4 V, more than 96% of gold removal efficiency in 20 h, and equivalent energy production of 2.0 kWh kg−1 of gold can be readily achieved in this system. When gold and copper ions coexist, it was confirmed that metallic Cu is formed on the cathodic electrode later than metallic Au formation by XPS analysis. Thus, this system can achieve step by step electrodeposition of gold and copper while the two metal ions coexisting. This work develops a new approach to retrieve valuable metals from aqueous solution or e-wastes." @default.
- W4242156522 created "2022-05-12" @default.
- W4242156522 date "1999-12-01" @default.
- W4242156522 modified "2023-10-14" @default.
- W4242156522 title "Patents alert" @default.
- W4242156522 doi "https://doi.org/10.1016/s0892-6875(99)90037-7" @default.
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