Pt anchored functionalized graphene nanosheets: A stable oxygen reduction electrocatalyst in alkaline electrolyte

被引：1

作者：

Sarkar, Ila Jogesh Ramala ^{[1
]}

Kumar, Sanjay ^{[1
]}

Koutavarapu, Ravindranadh ^{[2
]}

Bhatnagar, Ashish ^{[3
]}

Chetty, Raghuram ^{[4
]}

机构：

[1] Marwadi Univ, Fac Technol, Dept Chem Engn, Rajkot, India

[2] GMR Inst Technol, Dept Basic Sci & Humanities, Phys Div, Rajam, Andhra Pradesh, India

[3] Jaypee Inst Informat Technol, Dept Phys & Mat Sci & Engn, Noida, India

[4] Indian Inst Technol, Dept Chem Engn, Madras, India

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 67卷

关键词：

Graphene nano sheet; Functionalization; Oxygen reduction reaction; Stability; ANION-EXCHANGE MEMBRANES; WALL CARBON NANOTUBES; FUEL-CELLS; NITROGEN; NANOPARTICLES; CATALYSTS; NANOCOMPOSITES; PERFORMANCE; DEPOSITION; OXIDATION;

D O I：

10.1016/j.ijhydene.2023.11.140

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A Platinum-based graphene nanosheet electrocatalyst (Pt/GNS) was modified by changing its surface chemical composition (or functionalization), using citric acid via solid state method. The physical characterizations were orderly carried out by Raman spectroscopy, Fourier transform infrared spectroscopy, thermo-gravimetric analysis,X-ray powder diffraction, field emission scanning electron microscope, and transmission electron microscope. Electrocatalytic activity concerningto oxygen reduction reaction (ORR) of the synthesized catalyst was measured using a rotating disk electrode coupled with potentiostat/galvanostatinalkaline (0.1 M KOH) solution, and the performance was compared to conventional Pt/C catalyst. The developed electrocatalyst holds superior electrocatalytic properties compared to the unfunctionalized catalyst and Pt/C. Functionalized Pt/GNS exhibited better oxygen reduction activity of (0.86 V half-wave potential) and demonstrated 3.9 e - transfer against a single oxygen molecule. After 10,000 potential cycles of stability performance, the developed electrocatalyst showed remarkable durability.

引用

页码：992 / 999

页数：8

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