Self-humidifying manganese oxide-supported Pt electrocatalysts for highly-durable PEM fuel cells
| Autor: | Karthikeyan Shunmugavel, Mani Narayanasamy, Aristatil Ganesan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering Dry gas chemistry.chemical_element Nanoparticle Proton exchange membrane fuel cell 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Electrocatalyst 01 natural sciences 0104 chemical sciences Diffusion layer chemistry.chemical_compound chemistry Chemical engineering Cyclic voltammetry 0210 nano-technology Platinum |
| Zdroj: | Electrochimica Acta. 285:47-59 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2018.08.001 |
| Popis: | In this paper, we report on the synthesis and function of self-humidifying nature of manganese oxide supported platinum (Pt/MnxOx) electrocatalyst under dry gas condition in proton exchange membrane fuel cells (PEMFC) with excellent electrochemical stability, long-term durability and remarkable fuel cell performance. The high-surface area nano-petal shaped manganese oxide (MnxOx) clusters are synthesized by anodic deposition and the Platinum (Pt) nanoparticles are electrodeposited on diffusion layer (GDL) having two-layers of MnxOx coating. The morphology and self-humidifying nature of Pt/MnxOx were extensively studied through HR-SEM, HR-TEM, XPS, XRD, and water uptake studies. The electrochemical stability and long-term durability were investigated through cyclic voltammetry (CV) studies and single cell fuel cell performance. The MEAs using the spherical clusters of clump-like Pt/MnxOx exhibited a peak power of 0.65 W/cm2 at 0.48 V under dry gas condition without humidification. Also, the fuel cell delivered stable power output at a constant current density of 0.8 A/cm2 for about 150 h with a negligible potential drop of 26 μV h−1. The long-term durability, excellent electrochemical activity and self-humidifying nature of Pt/MnxOx may be attributed to the formation of hydroxyl groups on Pt/MnxOxwhich facilitates the proton conductivity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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