Effect of Different Carbon Supports on the Activity of PtNi Bimetallic Catalysts toward the Oxygen Reduction

To evaluate supports’ effects on catalytic activity toward the oxygen reduction reaction (ORR), a simple and controlled chemical synthesis, involving the hot injection of metal precursors, was developed to produce bimetallic PtNi nanoparticles (75 wt.% Pt and 25 wt.% Ni), supported on carbon nanotub...

Full description

Saved in:
Bibliographic Details
Published inCatalysts Vol. 12; no. 5; p. 477
Main Authors Ortíz-Herrera, Juan C., Tellez-Cruz, Miriam M., Solorza-Feria, Omar, Medina, Dora I.
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.05.2022
Subjects
Alloys
Bimetals
Carbon black
Carbon fibers
carbon nanofibers
Carbon nanotubes
Catalysts
Catalytic activity
Chemical reactions
Chemical reduction
Chemical synthesis
Electrocatalysts
Electrochemical analysis
Electrolytes
Fuel cells
Intermetallic compounds
Nanofibers
Nanoparticles
oxygen reduction reaction
Oxygen reduction reactions
Photomicrographs
Platinum
polymer electrolyte membrane fuel cell
Rotating disks
Scanning transmission electron microscopy
X-ray diffraction
Online AccessGet full text

Cover

More Information
Summary:To evaluate supports’ effects on catalytic activity toward the oxygen reduction reaction (ORR), a simple and controlled chemical synthesis, involving the hot injection of metal precursors, was developed to produce bimetallic PtNi nanoparticles (75 wt.% Pt and 25 wt.% Ni), supported on carbon nanotubes (CNTs) and carbon nanofibers (CNFs). The synthesized electrocatalyst was characterized using X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), and scanning transmission electron microscopy (STEM). To determine the catalytic activity, an electrochemical evaluation of the synthesized catalysts in an acidic medium was performed using cyclic voltammetry (CV), CO stripping, and rotating disk electrode (RDE) tests. The presence of Pt and Ni in the nanoparticles was confirmed by EDS and XRD. Based on the STEM micrographs, the average particle size was 30 nm. Compared to the commercial Pt/C catalyst, the PtNi/CNT catalyst exhibited higher specific activity and slightly lower mass activity toward ORR in a 0.1 M HClO4 electrolyte solution.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal12050477