Zeolite Framework-Anchored Carbon-Doped White Graphene as Antipoisoning Cathode Materials for Proton-Exchange Membrane Fuel Cells
- Title
- Zeolite Framework-Anchored Carbon-Doped White Graphene as Antipoisoning Cathode Materials for Proton-Exchange Membrane Fuel Cells
- Creator
- Mane R.S.; Nair A.S.; Jafri R.I.; Jha N.
- Description
- Efficient, robust, and highly sustainable platinum (Pt)-free electrocatalysts are pivotal for advancing the fuel cell (FC) performance. This study introduces a facile and green approach for synthesizing a rationally designed Co-based zeolite imidazole framework (ZIF) anchored onto carbon (C)-doped white graphene (C-WG) as an electrocatalyst (Z@-C-WG) for the oxygen reduction reaction (ORR). The synergistic effects between the ZIF and C-WG yield an electrocatalyst with enriched active sites. The intrinsic dual active sites coupled with favorable physicochemical properties promote oxygen adsorption and enhance the mass transfer rate. The hybrid catalyst demonstrates significantly improved activity, stability, and poisoning resistivity compared to Pt/C. The synthesized electrocatalyst exhibits superior ORR activity with an onset potential of Eon ?0.967 V (EonPt/C ?0.94 V) in acidic medium and Eon ?0.931 V (Eon(Pt/C) ?0.919) in alkaline medium. Validation through intrinsic parameters including electrochemical active area (ECSA), active site density (ASD), mass activity (MA), and turnover frequency (TOF) corroborates the catalysts enhanced performance. The stability tested for over 35 h coupled with high methanol tolerance affirms the catalysts robust activity. The Z@-C-WG electrocatalyst surpasses Pt/C in resisting poisoning species (CO and KSCN); also, poststripping analysis strongly confirms the presence of abundant active centers. Overall, this study offers a unique perspective toward the engineering of ORR catalyst architecture for fuel cell cathode applications. 2024 American Chemical Society.
- Source
- ACS Applied Nano Materials
- Date
- 2024-01-01
- Publisher
- American Chemical Society
- Subject
- active sites; antipoisoning; C-doped white graphene; durability; oxygen reduction reaction; PEMFC; stability
- Coverage
- Mane R.S., Department of Physics, Institute of Chemical Technology Mumbai, Nathalal Parekh Marg, Mumbai, 400019, India; Nair A.S., Department of Physics and Electronics, CHRIST (Deemed to be University), Hosur Rd, Bangalore, 5600029, India; Jafri R.I., Department of Physics and Electronics, CHRIST (Deemed to be University), Hosur Rd, Bangalore, 5600029, India; Jha N., Department of Physics, Institute of Chemical Technology Mumbai, Nathalal Parekh Marg, Mumbai, 400019, India
- Rights
- Restricted Access
- Relation
- ISSN: 25740970
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Mane R.S.; Nair A.S.; Jafri R.I.; Jha N., “Zeolite Framework-Anchored Carbon-Doped White Graphene as Antipoisoning Cathode Materials for Proton-Exchange Membrane Fuel Cells,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 23, 2025, https://archives.christuniversity.in/items/show/13499.