Investigation of zeolite supported platinum electrocatalyst for electrochemical oxidation of small organic species

Yao, Jun and Yufeng, Yao (2016) Investigation of zeolite supported platinum electrocatalyst for electrochemical oxidation of small organic species. International Journal of Hydrogen Energy, 41 . pp. 14747-14757. ISSN 0360-3199

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Abstract

Zeolite supported Pt electrocatalysts, made by ion exchange method using Pt/Y type zeolite, have been investigated to determine Pt electrochemical activity of HCOOH and CH3OH oxidation using the cyclic voltammetry (CV) and the extended X-ray adsorption fine structure (EXAFS) techniques. The study reveals that the introduction of excess H+ ions during electrocatalyst pre-treatment could enhance electrochemical reaction on Pt surface due to higher Pt dispersion, regardless of zeolite being a direct current electronic conducting insulator. Two possible conduction pathways might contribute to the electrocatalytic reaction on Pt surface with Pt particle size and loading: (1) hydrogen atoms/H+ ions spillover through zeolite framework and at the electrode and solution interface; (2) surface mobility of adsorbed species on electrode surface. The water may act as a carrier in assisting the migration of the H+ ions throughout zeolite channels to facilitate the charger and electron transfer in such an electrical system.

Keywords:Pt on Y zeolite; H+ spillover species surface mobility; HCOOH and CH3OH oxidation; CV; EXAFS, JCNotOpen
Subjects:F Physical Sciences > F200 Materials Science
F Physical Sciences > F342 Quantum Mechanics
H Engineering > H221 Energy Resources
H Engineering > H890 Chemical, Process and Energy Engineering not elsewhere classified
F Physical Sciences > F190 Chemistry not elsewhere classified
H Engineering > H800 Chemical, Process and Energy Engineering
Divisions:College of Science > School of Engineering
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ID Code:23524
Deposited On:04 Aug 2016 11:55

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