Synergetic effect induced/tuned bimetallic nanoparticles (Pt-Ni) anchored graphene as a catalyst for oxygen reduction reaction and scalable SS-314L serpentine flow field proton exchange membrane fuel cells (PEMFCs)

Rajavel Velayutham, Karthikeyan Palanisamy, Ramu Manikandan, Thiagarajan Velumani, Senthil Kumar AP, Joaquim Puigdollers, Byung Chul Kim

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

A simple design of electroactive and cost-effective electrocatalysts for oxygen reduction reaction (ORR) activity is crucial towards energy conversion in the commercialization of proton exchange membrane fuel cells (PEMFCs). Herein, we synthesized a stable electroactive bimetallic catalyst of Ni anchored with low loading of Pt nanoparticles, and graphene used as a supportive material for catalyst integration (Pt3-Ni/G). It exhibited maximum electrochemical surface area (ECSA, 108.56 m2/gPt), mass activity (2.2 A mgPt) and specific activity (3.47 mA cm−2), signifying an excellent ORR activity. In addition, a scalable PEMFC fabrication through 0.2 mgPtcm−2 Pt3-Ni/G as cathode with an active area of 25 cm2 and stainless steel-314L (SS-314L) used as a serpentine flow field. This strategy provides a maximum power output of 71.25 W mgPt−1 at current density 1.59 A cm−2. In addition, Pt3-Ni/C//Pt/C, based PEMFC system delivered a constant power output (68.75 W mgPt−1) even after 4 h of continuous cycling.

Original languageEnglish
Article number115780
JournalMaterials Science and Engineering: B
Volume282
DOIs
StatePublished - Aug 2022

Keywords

  • Bimetallic electrocatalyst
  • Graphene
  • Oxygen reduction reaction
  • PEM fuel cell
  • SS-314L serpentine flow field

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