%0 Journal Article %J Journal of Colloid and Interface Science %D 2021 %T Enhanced electrocatalytic activity of PtRu/nitrogen and sulphur co-doped crumbled graphene in acid and alkaline media %A Pang, Liuqing %A Miao, Yuanyuan %A Bhange, Siddheshwar N. %A Barras, Alexandre %A Addad, Ahmed %A Roussel, Pascal %A Amin, Mohammed A. %A Kurungot, Sreekumar %A Szunerits, Sabine %A Boukherroub, Rabah %K HER %K OER %K ORR %K PtRu2 %K Sulphur and nitrogen co-doped crumbled graphene %X

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.

%B Journal of Colloid and Interface Science %V 590 %P 154-163 %8 MAY %G eng %9 Article %3

Foreign

%4 8.128 %R 10.1016/j.jcis.2021.01.049