Nitrogen–Fluorine Dual Doped Porous Carbon Derived from Silk Cotton as Efficient Oxygen Reduction Catalyst for Polymer Electrolyte Fuel Cells
| Autor: | Prabakaran Varathan, Akhila Kumar Sahu, Srinu Akula, Bhuvaneswari Balasubramaniam |
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| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Heteroatom Energy Engineering and Power Technology chemistry.chemical_element Ionic bonding Polymer Electrolyte Catalysis chemistry.chemical_compound chemistry Chemical engineering Materials Chemistry Electrochemistry Fluorine Chemical Engineering (miscellaneous) Methanol Electrical and Electronic Engineering Carbon |
| Zdroj: | ACS Applied Energy Materials. 2:3253-3263 |
| ISSN: | 2574-0962 |
| DOI: | 10.1021/acsaem.9b00100 |
| Popis: | Porous carbon derived from silk cotton and heteroatom engineering is explored in this study for developing metal-free electrocatalysts for oxygen reduction (ORR). Individual and dual doping of N and F heteroatoms was conducted to regulate defects and the pore geometry to the porous carbon matrix. Microscopic analysis of N–F co-doped cotton carbon (N–F/CTC) undergoes morphological amendments in its textural properties and defects responsible in creating active sites for ORR. N–F/CTC catalyst exhibits excellent ORR catalytic activity and methanol and CO tolerance in the alkaline medium, which makes it a potential metal-free ORR catalyst for the polymer electrolyte membrane fuel cell. N–F/CTC catalyst is subjected to 10 000 repeated potential cycles with no degradation in its activity. XPS analysis of N–F/CTC catalyst revealed the presence of N in the form of pyridinic-N, pyrrolic-N, graphitic-N, active species, and F in the form of C–F ionic and C–F semi-ionic active forms. The maximum C–C bond polarization... |
| Databáze: | OpenAIRE |
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