Synthesis and study of the highly effective catalytic activity of the Pt-LaFeO3 nanoparticles supported on polyaniline-chitosan for methanol electro-oxidation

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KHAMMARNIA SOMAYEH; SAFFARI JILLA; Ekrami Kakhki Mehri Saddat; AKBARI ALIREZA

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Journal: Journal of Advanced Processes in Materials Engineering Year:2020 | Volume:13 | Issue:4 (51) Page(s): 43-55

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Title

Synthesis and study of the highly effective catalytic activity of the Pt-LaFeO3 nanoparticles supported on polyaniline-chitosan for methanol electro-oxidation

Author(s)

KHAMMARNIA SOMAYEH | SAFFARI JILLA | Ekrami Kakhki Mehri Saddat | AKBARI ALIREZA | Issue Writer Certificate

Keywords

PolyanilineQ2

ChitosanQ1

Lafeo3Q1

PtQ1

Methanol Electro-OxidationQ1

Abstract

In this study, Polyaniline (PA) accompanied by Chitosan (CH) were used as effective and proper support for nanoparticles. Lafeo3 (LFO) nanoparticles were synthesized by sol-gel method and characterized by X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS) techniques. Pt-LFO/PA-CH Nano catalyst was prepared by chemical reduction of H2PtCl6 by NaBH4 on PA-CH support in the presence of LFO nanoparticles. The morphology and distribution of nanoparticles were determined by transmission electron microscopy (TEM) images. The catalytic activity of Pt-LFO/PA-CH Nano catalyst for Methanol Electro-Oxidation was studied through cyclic voltammetry and electrochemical impedance spectroscopy. The effects of some experimental factors for Methanol Electro-Oxidation, such as methanol concentration, scan rate and temperature were studied on the prepared catalyst. The activation energy of the anodic peak of methanol oxidation at Pt-LFO/PA-CH was also calculated and its value was obtained 14. 17 kJ mol-1. The catalytic activity of Pt-LFO/PA-CH catalyst for Methanol Electro-Oxidation was compared with Pt/PA-CH catalyst. The electrochemically active surface area of Pt-LFO/PA-CH catalyst (77. 46 m2g-1Pt) was obtained more than Pt/PA-CH (54. 69 m2g-1Pt). At methanol concentration of 1. 76 M, the anodic peak current density of methanol oxidation at Pt-LFO/PA-CH (377. 58 mA cm-2) was obtained more than Pt/PA-CH catalyst (203. 67 mA cm-2). Higher electrochemically active surface area and current density of Pt-LFO/PA-CH for methanol oxidation indicating very improved catalytic activity of Pt-LFO/PA-CH for Methanol Electro-Oxidation. Thus, the prepared catalyst can be utilized as effective catalyst for Methanol Electro-Oxidation in direct methanol fuel cells.

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APA: Copy

KHAMMARNIA, SOMAYEH, SAFFARI, JILLA, Ekrami Kakhki, Mehri Saddat, & AKBARI, ALIREZA. (2020). Synthesis and study of the highly effective catalytic activity of the Pt-LaFeO3 nanoparticles supported on polyaniline-chitosan for methanol electro-oxidation. ADVANCED PROCESSES IN MATERIALS, 13(4 (51) ), 43-55. SID. https://sid.ir/paper/172522/en

Vancouver: Copy

KHAMMARNIA SOMAYEH, SAFFARI JILLA, Ekrami Kakhki Mehri Saddat, AKBARI ALIREZA. Synthesis and study of the highly effective catalytic activity of the Pt-LaFeO3 nanoparticles supported on polyaniline-chitosan for methanol electro-oxidation. ADVANCED PROCESSES IN MATERIALS[Internet]. 2020;13(4 (51) ):43-55. Available from: https://sid.ir/paper/172522/en

IEEE: Copy

SOMAYEH KHAMMARNIA, JILLA SAFFARI, Mehri Saddat Ekrami Kakhki, and ALIREZA AKBARI, “Synthesis and study of the highly effective catalytic activity of the Pt-LaFeO3 nanoparticles supported on polyaniline-chitosan for methanol electro-oxidation,” ADVANCED PROCESSES IN MATERIALS, vol. 13, no. 4 (51) , pp. 43–55, 2020, [Online]. Available: https://sid.ir/paper/172522/en

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