Enhanced electrocatalytic activity of PtRu/nitrogen and sulphur co-doped crumbled graphene in acid and alkaline media

TitleEnhanced electrocatalytic activity of PtRu/nitrogen and sulphur co-doped crumbled graphene in acid and alkaline media
Publication TypeJournal Article
Year of Publication2021
AuthorsPang, L, Miao, Y, Bhange, SN, Barras, A, Addad, A, Roussel, P, Amin, MA, Kurungot, S, Szunerits, S, Boukherroub, R
JournalJournal of Colloid and Interface Science
Volume590
Pagination154-163
Date PublishedMAY
Type of ArticleArticle
ISSN0021-9797
KeywordsHER, OER, ORR, PtRu2, Sulphur and nitrogen co-doped crumbled graphene
Abstract

The low mass activity and high price of pure platinum (Pt)-based catalysts predominantly limit their large-scale utilization in electrocatalysis. Therefore, the reduction of Pt amount while preserving the electrocatalytic efficiency represents a viable alternative. In this work, we prepared new PtRu2 nanoparticles supported on sulphur and nitrogen co-doped crumbled graphene with trace amounts of iron (PtRu2/PF) electrocatalysts. The PtRu2/PF catalysts exhibited enhanced electrocatalytic performance and stability for the hydrogen evolution reaction (HER) at pH = 0. Moreover, the prepared PtRu2/PF electrocatalyst displayed higher HER activity than commercial 20% Pt/C. The PtRu2/PF catalyst achieved a current density of 10 mA cm(-2) at an overpotential value of only 22 mV for HER, performing better activity than many other Pt-based electrocatalysts. Besides, the PtRu2/PF revealed a good performance for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline media. The PtRu2/PF catalyst recorded a current density of 10 mA cm(-2) at an overpotential of only 270 mV for OER in KOH (1.0 M) solution and an onset potential of 0.96 V vs. RHE (at 1 mA cm(-2)) for ORR in KOH (0.1 M) solution. (C) 2021 Elsevier Inc. All rights reserved.

DOI10.1016/j.jcis.2021.01.049
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)8.128
Divison category: 
Physical and Materials Chemistry

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