Recovery of expensive Pt/C catalysts from the end-of-life membrane electrode assembly of proton exchange membrane fuel cells

Bharti, Abha; Natarajan, Rajalakshmi

doi:10.1039/d0ra06640k

Cited by 6 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, chemical methods can achieve the stratification of MEA. In past studies, it has been reported that soaking the MEA in an aqueous alcohol solution or using a 50% isopropanol (IPA) solution resulted in complete delamination of the MEA [26], and that using dilute sulfuric acid as a pretreatment reagent obtained good results [26,27]. In this study, the use of 50% IPA effectively separate PEM, GDL, and CL which undergo solid-liquid separation for subsequent Pt leaching.…”

Section: Introductionmentioning

confidence: 82%

Leaching Efficiency and Kinetics of Platinum from Spent Proton Exchange Membrane Fuel Cells by H2O2/HCl

Chen

Liu

Chen

2023

Metals

View full text Add to dashboard Cite

The increasing carbon emissions from various fossil fuels have led to the search for efficient and clean energy sources to replace them. Proton exchange membrane fuel cells (PEMFCs) are a promising alternative, but the use of platinum as a catalyst material poses challenges due to its limited resources and low abundance. This study proposes an efficient method for platinum recovery while retaining spent membranes. The membrane and catalyst were separated using isopropanol, and the spent membrane was dissolved in a 50% ethanol solution to prepare the precursor for subsequent membrane regeneration. Hydrochloric acid (HCl) was used as the leaching agent, and the experimental parameters such as HCl concentration, H2O2 concentration, contact time, and operating temperature were optimized to achieve the highest platinum leaching rate. Finally, through isothermal leaching experiments, the leaching mechanism was investigated using the shrinking core model, indicating the involvement of both surface chemical and inner diffusion mechanisms in the platinum leaching process, primarily controlled by the inner diffusion mechanism. Under optimal conditions, the platinum leaching rate was about 90%, and the activation energy of the reaction was calculated to be 6.89 kJ/mol using the Arrhenius equation.

show abstract

Section: Introductionmentioning

confidence: 82%

Leaching Efficiency and Kinetics of Platinum from Spent Proton Exchange Membrane Fuel Cells by H2O2/HCl

Chen

Liu

Chen

2023

Metals

View full text Add to dashboard Cite

show abstract

“…1 However, the high cost of FCVs ascribed to the expensive perfluorinated proton exchange membranes (such as Gore Select) and the platinum catalyst seems to hinder their widespread dissemination. 2 In contrast, anion exchange membrane fuel cells (AEMFCs) have been manifested as a promising alternative to PEMFCs owing to the deployment of less-expensive AEMs and non-PGM catalysts. 3 AEMs play a pivotal role in AEMFCs and other alkaline electrochemical devices not only as a gas separator and ion transporter but also as an electrode binder in the catalyst layer.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Recent advancement in proton exchange membrane fuel cells (PEMFCs) have promoted their applications, in particular, for fuel cell vehicles (FCVs), thanks to their zero-emission, rapid, and long-range running for a single fueling . However, the high cost of FCVs ascribed to the expensive perfluorinated proton exchange membranes (such as Gore Select) and the platinum catalyst seems to hinder their widespread dissemination . In contrast, anion exchange membrane fuel cells (AEMFCs) have been manifested as a promising alternative to PEMFCs owing to the deployment of less-expensive AEMs and non-PGM catalysts …”

Section: Introductionmentioning

confidence: 99%

Tuning the Hydrophobic Component in Reinforced Poly(arylimidazolium)-Based Anion Exchange Membranes for Alkaline Fuel Cells

Mahmoud

Miyatake

2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

A series of imidazolium-based aromatic copolymers were synthesized using fluorinated and non-fluorinated hydrophobic monomers. The quaternized copolymers were reinforced with the plasma-treated porous polyethylene substrate to provide flexible, homogeneous membranes. Crosssectional SEM images revealed a triple-layer structure. The reinforced membranes exhibited phase-separated morphology as confirmed through TEM images. Among the membranes, QQP-MEIm-PE-containing quinquephenylene hydrophobic groups exhibited the most balanced properties (ion conductivity, mechanical strength, and alkaline stability). In particular, QQP-MEIm-PE exhibited excellent elongation properties with 24 MPa maximum stress and 205% elongation at break. A single H 2 /O 2 fuel cell using the QQP-MEIm-PE membrane (1.26 meq g −1 ) and non-PGM-(Fe−N−C) cathode achieved 222 mW cm −2 , which accounted for 888 mW mg −1 Pt at 560 mA cm −2 . Reasonable durability was confirmed with the membrane in the operating fuel cell.

show abstract

Platinum recycling from fuel cell-spent electrocatalysts using oxidative leaching in HCl solution

Trinh,

Kim,

Son

et al. 2024

Cleaner Engineering and Technology

View full text Add to dashboard Cite

Recovery of expensive Pt/C catalysts from the end-of-life membrane electrode assembly of proton exchange membrane fuel cells

Abstract: A sustainable approach for the recovery of EoL MEAs and possibility of pushing the recovered products back into the supply chain.

Cited by 6 publications

References 22 publications

Leaching Efficiency and Kinetics of Platinum from Spent Proton Exchange Membrane Fuel Cells by H2O2/HCl

Leaching Efficiency and Kinetics of Platinum from Spent Proton Exchange Membrane Fuel Cells by H2O2/HCl

Tuning the Hydrophobic Component in Reinforced Poly(arylimidazolium)-Based Anion Exchange Membranes for Alkaline Fuel Cells

Platinum recycling from fuel cell-spent electrocatalysts using oxidative leaching in HCl solution

Contact Info

Product

Resources

About