Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

Abstract

Platinum nanoparticles were deposited on reduced graphene oxide (rGO) and nitrogen-doped rGO (rGOÀN) by He/H 2 plasma jet treatment of H 2 PtCl 6 aqueous solution for electroreduction of oxygen. Physical characterization of the prepared catalysts was performed by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Electrochemical characterization was carried out by cyclic voltammetry and CO-stripping techniques. The oxygen reduction reaction (ORR) activity of the prepared Pt/rGO and Pt/ rGOÀN catalyst materials was investigated using the rotating disk electrode method in 0.1 M KOH and 0.05 M H 2 SO 4 . In both acidic and alkaline electrolytes, the catalyst materials prepared by the plasma jet method demonstrated superior electrocatalytic properties compared to that of commercial 20 wt% Pt/ C catalyst. Specific activity values for the ORR in acid electrolyte were 2-fold and in alkaline media more than 3-fold higher than that obtained for commercial Pt/C catalyst.

Enhanced oxygen reduction reaction activity and durability of Pt nanoparticles deposited on graphene-coated alumina nanofibres

“…These results are more promising than those of our previous investigations where Pt deposited on reduced graphene oxide and nitrogen-doped graphene oxide exhibited SA values of 0.20 and 0.22 mA cm −2 in 0.05 M H 2 SO 4 , respectively. 12 The mass activities of Pt/GCNF(PS), Pt/GCNF(SD) and Pt/C catalysts were found to be 93, 70 and 55 A g −1 . The specific and mass activities of Pt NPs electrodeposited on GNR are previously reported to be 0.67 mA cm −2 and 104 A g −1 , respectively.…”

“…In our previous work, we reported uniform distribution of Pt NPs on reduced graphene oxide (rGO) and nitrogen-doped rGO with a narrow particle size distribution, using a plasma-assisted synthesis procedure. 12 The prepared catalysts showed comparable ORR activity to commercial Pt/C (20 wt%) in both acid and alkaline media.…”

“…7 Consequently, various Pt deposition techniques and a variety of support materials are employed to fabricate more active and durable ORR electrocatalysts. [8][9][10][11][12][13][14] Carbon-based supports are usually preferred for this purpose due to their higher specic surface area, remarkable electrical conductivity, high chemical stability, and good mechanical and thermal resistance. [15][16][17] However, carbon corrosion in the fuel cell environment is a serious drawback of using such supports because it compromises the durability of the cathode catalyst.…”

Graphene and Graphene-Like Materials for Hydrogen Energy

“…The authors also proposed a flexible one-step method for depositing Pt nanoparticles onto the RGO surface by plasma jet treatment of a solution of H 2 PtCl 6 . The resulting electrocatalyst demonstrated high activity in the ORR in both acidic and alkaline solutions [ 122 ].…”

A Review on the Promising Plasma-Assisted Preparation of Electrocatalysts

“…The Pt nanoparticles with a diameter of about 38.14 nm were composed of many primary particles with a diameter of about 1.85 nm, which exposed more (111) crystal faces and exhibited good HOR catalytic activity. In 2018, Hussain et al [39] used He/H 2 plasma to reduce H 2 PtCl 6 to Pt nanoparticles which were then loaded on nitrogen-doped reduced graphene oxide (rGO-N). The obtained Pt/rGO-N electrocatalysts showed a comparable high ORR electrocatalytic activity and superior stability to the commercial Pt/C.…”