Ultrasound-assisted synthesis of Pt–Co/C bimetallic alloys for oxygen reduction in PEM fuel cells

Abstract

The polarization study revealed the information on the electrocatalytic activity of Pt–Co/C cathodes in PEMFCs.

Synthesis of bimetallic Co–Pt/cellulose nanocomposites for catalytic reduction of p-nitrophenol

“…42 Baye et al stated that the Co NPs formed from Co 2+ using NaBH 4 are amorphous in nature leading to the appearance of weak peaks for Co. 1 As per Polagani et al the absence of Co diffraction peaks can be caused by the formation of noble metal alloys with Co which is in accordance with Vegard's law. 43 Furthermore, in the XRD pattern of Co–Pt/CNFs at 2 θ = 22.49° a small hump was noticed related to the (200) plane of CNFs. This is due to the presence of high intensity peaks for Co–Pt over CNFs.…”

Enhanced Multifunctional Electrocatalytic Activity of Pt-Co Nanoalloy-Decorated Graphene Oxide Sheets through Strong Metal–Support Interaction

“…In this regard, the dispersion of these electrocatalytic materials over suitable support materials such as carbonaceous materials that shows strong metal–support interaction (SIMS) seems to be a very promising strategy. , A few researchers in the recent past have attempted the use of this strategy toward enhancement of electrocatalytic activity of Pt-Co nanoalloys. It includes Pt-Co-decorated electrospun carbon nanofibers for HER activity, ultrasound-assisted synthesized Pt-Co/Carbon for the ORR in PEM fuel cells, and carbon-supported Pt-Co synthesized through chemical reduction methods for the ORR, to list a few.…”

“…32,33 A few researchers in the recent past have attempted the use of this strategy toward enhancement of electrocatalytic activity of Pt-Co nanoalloys. It includes Pt-Codecorated electrospun carbon nanofibers for HER activity, 34 ultrasound-assisted synthesized Pt-Co/Carbon for the ORR in PEM fuel cells, 35 and carbon-supported Pt-Co synthesized through chemical reduction methods for the ORR, 36 to list a few.…”

A green adaptation of the critical resource of platinum group metals (PGMs) from spent autocatalysts to electrocatalysts for renewable power conversion

“…[1][2][3][4] State-of-the-art PEMFC and electrolyser technologies rely largely on platinum group metal (PGM) electrocatalysts to efficiently and reliably catalyse electrochemical reactions. [5][6][7][8][9][10][11][12][13] Nanoparticulate platinum supported on carbon (Pt/C) is frequently used as the cathode catalyst for electrolysers and both the anode and cathode catalysts for PEMFCs. 5,7,14,15 Though various low PGM/PGM-free electrocatalysts are reported 11,12,[16][17][18][19] in scientic elds and some markets, their actual industrial implementation in demanding environments (e.g.…”

“…[5][6][7][8][9][10][11][12][13] Nanoparticulate platinum supported on carbon (Pt/C) is frequently used as the cathode catalyst for electrolysers and both the anode and cathode catalysts for PEMFCs. 5,7,14,15 Though various low PGM/PGM-free electrocatalysts are reported 11,12,[16][17][18][19] in scientic elds and some markets, their actual industrial implementation in demanding environments (e.g. automobiles) is rarely seen, which cannot undermine the dominating demand for the PGM electrocatalyst in the hydrogen economy.…”