Electrocatalytical Application of Platinum Nanoparticles Supported on Reduced Graphene Oxide in PEM Fuel Cell: Effect of Reducing Agents of Dimethlyformamide or Hydrazine Hydrate on the Properties

Abstract

Two kinds of reduced graphene oxide (rGO) were synthesized with the reducing agents of either dimethylformamide (DMF) or hydrazine hydrate (HYD). The decoration of platinum nanoparticles (Pt NPs) over these materials was provided by microwave irradiation (MWI) method. Detailed physical and electrochemical measurements were carried out. Based on the electrochemical results of both catalysts, it is not surprising the achievement of higher electrochemical active surface area (ECSA), higher oxygen reduction reaction (ORR) activity, higher electron transfer number, lower charge transfer resistance and higher fuel cell performance with the Pt/rGO (DMF) catalyst which surpasses Pt/rGO (HYD) in many ways.

The Facile Deposition of Pt Nanoparticles on Reduced Graphite Oxide in Tunable Aryl Alkyl Ionic Liquids for ORR Catalysts

“…A comparison of previous research on Pt-NP@rGO shows the highest ECSA and MA for Pt-NP decorated on tetradecyl-methyl-imidazolium ionic liquid-treated graphene (Pt-TMIm-rGO) by Badam et al [ 34 ], albeit with a similar ECSA to the 55 m 2 g Pt −1 of MP5_rGO-2/1 . Notably, the MP_rGO samples have higher ECSA values, compared with the results of the Pt/rGO probes of Daş et al [ 35 ] and Teran-Salgadon et al [ 36 ], much higher MA values than obtained by Daş et al [ 35 ] and similar to slightly smaller MA values than given by Teran-Salgadon et al [ 36 ]. From the comparison, it becomes evident that ILs can significantly increase the catalytic activity of Pt-NP@rGO samples.…”

“…The electrochemical surface area (ECSA) was determined by integrating the hydrogen underpotential deposition (H upd ) charge (H upd charge to surface area conversion constant: 210 μC cm −2 ) in the obtained CVs, and, with the obtained LSVs, mass-specific activities (MAs) at 0.9 V were calculated. The obtained ECSA and MA are compared in Table 2 to the results of Pt-NPs deposited on rGO via different reaction methods from previous studies of Badam et al [ 34 ], Daş et al [ 35 ], and Teran-Salgadon et al [ 36 ].…”

Graphene aerogels: part 2 - derived from commercial graphene and chemically reduced graphene oxide via supercritical carbon dioxide drying

“…The RGO used in this study was synthesized via chemical reduction. Many reducing agents (hydrazine [ 25 , 26 ], N, N-dimethylformamide (DMF) [ 26 , 27 ], thiourea dioxide [ 28 , 29 ], L-ascorbic acid (LAA) [ 30 , 31 ], hydroquinone [ 32 ], sodium borohydride [ 32 , 33 ]) have been used in the chemical reduction process. In this study, hydrazine monohydrate was used [ 10 ].…”