Sustainable Platinum Recycling through Electrochemical Dissolution of Platinum Nanoparticles from Fuel Cell Electrodes

Autor:	Peter Lund, Søren Bredmose Simonsen, Raghunandan Sharma, Laila Grahl-Madsen, Shuang Ma Andersen, Kasper Rode Nielsen
Rok vydání:	2019
Předmět:	Platinum nanoparticle Materials science chemistry.chemical_element Proton exchange membrane fuel cell Electrochemical dissolution Electrochemistry Platinum nanoparticles Catalysis chemistry Chemical engineering Electrode Fuel cells Recycling Potentiodynamic Platinum Dissolution
Zdroj:	Sharma, R, Rode Nielsen, K, Brilner Lund, P, Bredmose Simonsen, S, Grahl-Madsen, L & Ma Andersen, S 2019, ' Sustainable Platinum Recycling through Electrochemical Dissolution of Platinum Nanoparticles from Fuel Cell Electrodes ', ChemElectroChem, vol. 6, no. 17, pp. 4471-4482 . https://doi.org/10.1002/celc.201900846 Sharma, R, Rode Nielsen, K, Lund, P B, Simonsen, S B, Grahl-Madsen, L & Andersen, S M 2019, ' Sustainable platinum recycling through electrochemical dissolution of platinum nanoparticles from fuel cell electrodes ', ChemElectroChem, vol. 6, no. 17, pp. 4471-4482 . https://doi.org/10.1002/celc.201900846
ISSN:	2196-0216
Popis:	Recycling of the platinum group metals (PGMs) containing industrial wastes obtained from proton exchange membrane fuel cells (PEMFCs), electrolyzers, catalytic convertors and others is of high strategical importance for industrial sustainability. In this work, a highly efficient and environmentally friendly platinum recycling method through potentiodynamic cycling in dilute acidic chloride solutions is demonstrated and optimized to recover platinum from fuel cell electrodes. The process parameters such as upper and lower potential limits are optimized to be 1.6 and 0.4 V vs. RHE. Both the dilute acidic and the acid free Cl‐ containing electrolytes may be used for the dissolution. Moreover, parameters such as protocol reliability, quantification method and comparison, electrode interface structure, dissolution product and mechanisms etc. are discussed. A study in 1 M HCl shows Pt dissolution rates as high as ~30 µg/cycle for potential cycling between 0.4 and 1.6 V (scan rate: 100 mV/s) for a PEMFC electrode with initial Pt loading of ~470 µg. The approach demonstrates a methodology for fast parameter screening on electrocatalyst dissolution and a proof of concept industrial recycling of spent electrocatalysts.
Databáze:	OpenAIRE
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