Pd-Ni nanoparticle supported on reduced graphene oxide and multi-walled carbon nanotubes as electrocatalyst for oxygen reduction reaction
Küçük Resim Yok
Tarih
2018
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this work, Pd-Ni and Pd nanoparticles are deposited on Vulcan carbon (XC-72R), multi-walled carbon nanotubes (MWCNTs) and reduced graphene oxide (rGO) and investigated towards oxygen reduction reaction (ORR). The structural features of catalyst are characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectroscopy (EDX). The ORR activity of catalysts is investigated via cyclic voltammetry (CV), rotating disk electrode (RDE), electrochemical impedance spectroscopy (EIS) and chronoamperometry techniques. Comparative CV analysis reveals higher electrochemical active surface area (ECSA) of Pd-Ni/rGO catalyst. This result suggests a general approach of a synergistic effect between Pd and Ni nanoparticles and better Pd-Ni dispersion on graphene sheets. The results from ORR measurements show that Pd-Ni/rGO has remarkable electrocatalytic activity and stability compared to Pd/C. The Koutecky-Levich and Tafel analysis suggest that the proposed main path in the ORR mechanism is direct four-electron transfer process with faster transfer kinetic rate on the Pd-Ni/rGO.
Açıklama
Anahtar Kelimeler
Graphene-supported composite, MWCNTs, oxygen reduction reaction, palladium, nickel
Kaynak
Fullerenes Nanotubes and Carbon Nanostructures
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
26
Sayı
10
