Pang Liuqing, Miao Yuanyuan, Bhange Siddheshwar N, Barras Alexandre, Addad Ahmed, Roussel Pascal, Amin Mohammed A, Kurungot Sreekumar, Szunerits Sabine, Boukherroub Rabah
Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520, IEMN, F-59000 Lille, France.
Physical & Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune, Maharashtra, India.
J Colloid Interface Sci. 2021 May 15;590:154-163. doi: 10.1016/j.jcis.2021.01.049. Epub 2021 Jan 21.
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 PtRu nanoparticles supported on sulphur and nitrogen co-doped crumbled graphene with trace amounts of iron (PtRu/PF) electrocatalysts. The PtRu/PF catalysts exhibited enhanced electrocatalytic performance and stability for the hydrogen evolution reaction (HER) at pH = 0. Moreover, the prepared PtRu/PF electrocatalyst displayed higher HER activity than commercial 20% Pt/C. The PtRu/PF catalyst achieved a current density of 10 mA cm at an overpotential value of only 22 mV for HER, performing better activity than many other Pt-based electrocatalysts. Besides, the PtRu/PF revealed a good performance for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline media. The PtRu/PF catalyst recorded a current density of 10 mA cm 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) for ORR in KOH (0.1 M) solution.
纯铂（Pt）基催化剂的低质量活性和高价格主要限制了它们在电催化中的大规模应用。因此，在保持电催化效率的同时减少Pt用量是一种可行的替代方案。在这项工作中，我们制备了负载在硫和氮共掺杂的碎石墨烯上并含有痕量铁的新型PtRu纳米颗粒（PtRu/PF）电催化剂。PtRu/PF催化剂在pH = 0时对析氢反应（HER）表现出增强的电催化性能和稳定性。此外，制备的PtRu/PF电催化剂显示出比商业20% Pt/C更高的HER活性。PtRu/PF催化剂在HER的过电位仅为22 mV时实现了10 mA cm的电流密度，其活性优于许多其他Pt基电催化剂。此外，PtRu/PF在碱性介质中对氧还原反应（ORR）和析氧反应（OER）也表现出良好的性能。在KOH（1.0 M）溶液中，PtRu/PF催化剂在OER的过电位仅为270 mV时记录到10 mA cm的电流密度，在KOH（0.1 M）溶液中，ORR相对于可逆氢电极（RHE）的起始电位为0.96 V（在1 mA cm时）。
