eprintid: 6042
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/60/42
datestamp: 2023-11-09 16:17:47
lastmod: 2023-11-09 16:17:47
status_changed: 2023-11-09 16:04:40
type: article
metadata_visibility: show
creators_name: Saha, S.
creators_name: Ganguly, S.
creators_name: Banerjee, D.
creators_name: Kargupta, K.
title: Novel bimetallic graphene-cobalt-nickel (G-Co-Ni) nano-ensemble electrocatalyst for enhanced borohydride oxidation
ispublished: pub
keywords: Absorption spectroscopy; Catalyst activity; Catalytic oxidation; Cobalt; Cobalt metallography; Cyclic voltammetry; Electrocatalysts; Fourier transform infrared spectroscopy; Graphene; Ions; Nanocatalysts; Nickel; Nickel metallography; Oxidation, Bimetallic catalysts; Borohydride oxidation; Borohydrides; Cobalt-nickel catalysts; Electroactive surface areas; Electrocatalytic activity; Linear sweep voltammetry; Nano-ensembles, Catalyst supports
note: cited By 34
abstract: Electrochemically active bi-metallic nano-ensemble, Graphene-Cobalt-Nickel (G-Co-Ni) is proposed as the electro-catalyst for direct oxidation of BH4- ions. Three nano-hybrid electro-catalysts namely Graphene-Cobalt (G-Co), Graphene-Nickel (G-Ni) and Graphene-Cobalt-Nickel (G-Co-Ni) are synthesized and characterized using XRD, FTIR, Raman's spectroscopy, SEM, HRTEM, EDAX and mass absorption spectroscopy. The electro-catalytic activity of the synthesized catalysts towards the oxidation of BH4- ions was investigated by means of cyclic voltammetry (CV) and linear sweep voltammetry (LSV). Among the different electro-catalysts G-Co-Ni (�4.5:1:1 weight ratio) exhibits the highest value of electroactive surface area (ESA = 518.6 m2/gm). G-Co-Ni shows enhanced mass specific activity (msa: 750-900 A g-1) towards the direct oxidation of BH4- ions and oxidation of H2 generated by catalytic hydrolysis of BH4- ions comparing with G-Ni (msa: 130-160 A g-1) and G-Co (msa: 120-130 A g-1) catalysts. The enhanced electro-catalytic activity is attributed to the increased number of reaction sites and pathways of electron transfer through graphene supported bimetals. © 2014 Hydrogen Energy Publications, LLC.
date: 2015
publisher: Elsevier Ltd
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84920698441&doi=10.1016%2fj.ijhydene.2014.11.143&partnerID=40&md5=b3e77306e29d5c640f67c9f785758030
id_number: 10.1016/j.ijhydene.2014.11.143
full_text_status: none
publication: International Journal of Hydrogen Energy
volume: 40
number: 4
pagerange: 1760-1773
refereed: TRUE
issn: 03603199
citation:   Saha, S. and Ganguly, S. and Banerjee, D. and Kargupta, K.  (2015) Novel bimetallic graphene-cobalt-nickel (G-Co-Ni) nano-ensemble electrocatalyst for enhanced borohydride oxidation.  International Journal of Hydrogen Energy, 40 (4).  pp. 1760-1773.  ISSN 03603199