Trifunctional Electrocatalytic Activities of Nitrogen‐Doped Graphitic Carbon Nanofibers Synthesized by Chemical Vapor Deposition. Issue 20 (24th May 2021)

• Record Type: Journal Article
• Authors: Todankar, Bhagyashri; Desai, Pradeep; Ranade, Ajinkya K.; Narayanan, Tharangattu N.; Tanemura, Masaki; Kalita, Golap
• Is Part Of: ChemistrySelect. Volume 6:Issue 20(2021)
• Page Start: 4867
• Page End: 4873
• Publication Date: 2021-05-24
• Subjects: chemical vapor deposition -- electrochemistry -- fuel cell -- nanofibers -- supported catalysts.; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202101068
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: High performance multifunctional electrocatalysts are attracting significant importance for application in energy storage, energy conversion and various other electrochemical reactions. In this prospect, we report on the effective trifunctional electrocatalytic properties of nitrogen (N) doped graphitic carbon nanofibers (CNFs). The CNFs were synthesized on a nichrome (NiCr) foil by chemical vapor deposition (CVD) process. Incorporation of Ni and Cr was observed in the N doped CNFs sample from microscopic and spectroscopic analysis. The metal nanoparticles can be significant in boosting the trifunctional electrocatalytic behavior. The effective oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) activities were obtained for the CNFs sample with relatively good overpotential values. The electron transfer number per O2 molecule calculated from Koutecky‐Levich (K‐L) plot was found to be 2e − for the ORR reaction. The OER activity of the CNFs is comparable to commercially available iridium oxide (IrO2 ), signifying the effectiveness of the developed catalyst. Our study revealed that N doped CNFs with incorporation of metal particles synthesized on a binary metal substrate can be significant as ORR, OER, HER trifunctional electrocatalyst. Abstract : In this study, we report the trifunctional electrochemical properties of nitrogen doped carbon nanofibers synthesized on nichrome foil. The catalyst exhibited excellent hydrogen evolution reaction (HER), oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) with low overpotential values and high durability comparable to noble catalysts. The catalyst exhibited a 2‐electron pathway for ORR. The double layer capacitance was calculated and stability against graphite rod as a counter electrode was found to be unstable as compared to Pt counter electrode.