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

• Published in: Journal of colloid and interface science 2021-05, Vol.590, p.154-163
• Main Authors: Pang, Liuqing, Miao, Yuanyuan, Bhange, Siddheshwar N., Barras, Alexandre, Addad, Ahmed, Roussel, Pascal, Amin, Mohammed A., Kurungot, Sreekumar, Szunerits, Sabine, Boukherroub, Rabah
• Format: Article
• Language: English
• Subjects: Chemical Sciences; Engineering Sciences; HER; Material chemistry; OER; ORR; PtRu2; Sulphur and nitrogen co-doped crumbled graphene
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2021.01.049

[Display omitted] 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.