Various Carbon Chain Containing Linkages Grafted Graphene with Silver Nanoparticles Electrocatalysts for Oxygen Reduction Reaction. Issue 1 (1st January 2015)

• Record Type: Journal Article
• Authors: Lee, Kyungmi; Ahmed, Mohammad Shamsuddin; Jeon, Seungwon
• Is Part Of: Journal of the Electrochemical Society. Volume 162:Issue 1(2015)
• Page Start: F1
• Page End: F8
• Publication Date: 2015-01-01
• Subjects: Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0931414jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : In this study, we have synthesized an efficient catalyst by various carbon chain containing linkers grafted graphene with silver nanoparticles (AgNPs)-decorated GO-S-(CH2 ) x -SH (where x = 2, 3, 4 and denoted as GO- Cx -Ag) for oxygen reduction reaction (ORR). The structural and morphological properties have investigated via several instrumental methods. Among those catalysts, the GO- C2 -Ag has showed an excellent electrocatalytic performance by cyclic voltammetry (CV) and hydrodynamic techniques for ORR in alkaline media. Hydrodynamic voltammetry reveals that the GO- C2 -Ag modified electrode has catalyzed effectively at higher potential. The overall electrocatalytic results showed that the GO- C2 -Ag has better activity toward ORR and demonstrated nearly four electron transfer pathway into H2 O due to much grafting of linker molecule and smaller size of AgNPs. The value of transferred electron number ( n ) and other kinetic parameters have demonstrated that the GO- C2 -Ag is highly facilitated than that of GO-Ag and other GO- Cx -Ag to electrocatalytic oxygen reduction.