期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 125, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2021.106976
关键词
Oxygen reduction; Electrocatalysis; Heteroatom doping; N; P dual doping; Carbide-derived carbon
资金
- Estonian Research Council [PRG723, PRG4]
- Estonian Ministry of Education and Research [IUT34-14]
- EU through the European Regional Development Fund [TK141, TK134]
This study successfully doped nitrogen and phosphorus into silicon carbide-derived carbon (SiCDC) using melamine phosphate and hexachlorocyclotriphosphazene as precursors, resulting in high oxygen reduction reaction (ORR) activity, potentially due to the generation of new ORR-active sites.
In this study, two compounds (melamine phosphate and hexachlorocyclotriphosphazene) were used as nitrogen and phosphorus precursors to dope silicon carbide-derived carbon (SiCDC) with nitrogen and phosphorus moieties. The successful heteroatom doping was confirmed by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy/energy-dispersive X-ray (SEM-EDX) analysis. The resulting N,P-doped SiCDC exhibited high oxygen reduction reaction (ORR) performance in alkaline conditions in terms of onset and halfwave potential, slightly surpassing the ORR activity of solely N-doped SiCDC. Since N2 physisorption showed that the porosity parameters and specific surface area of N,P-doped SiCDC (in which melamine phosphate was used as a N and P precursor) were rather similar to that of N-doped SiCDC, the improvement in the ORR activity of N,Pdoped SiCDC could be attributed to the new ORR-active sites produced by the introduction of nitrogen and phosphorus moieties into the SiCDC.
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