Electrochemical characterization of single cell and short stack PEM electrolyzers based on a nanosized IrO2 anode electrocatalyst

被引：140

作者：

Siracusano, S. ^{[1
]}

Baglio, V. ^{[1
]}

Di Blasi, A. ^{[1
]}

Briguglio, N. ^{[1
]}

Stassi, A. ^{[1
]}

Ornelas, R. ^{[2
]}

Trifoni, E. ^{[2
]}

Antonucci, V. ^{[1
]}

Arico, A. S. ^{[1
]}

机构：

[1] CNR ITAE, I-98126 Messina, Italy

[2] Tozzi Renewable Energy SpA, I-48010 Mezzano, RA, Italy

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2010年 / 35卷 / 11期

关键词：

PEM electrolyzer; Stack; IrO2; Nanosized catalyst; Oxygen evolution reaction; Hydrogen production; SOLID POLYMER ELECTROLYTE; OXYGEN EVOLUTION REACTION; BINARY OXIDE PARTICLES; WATER ELECTROLYSIS; GEL PROCESS; HYDROGEN EVOLUTION; PERFORMANCE; CATALYSTS; ENERGY; FILMS;

D O I：

10.1016/j.ijhydene.2010.03.102

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 nanosized IrO2 anode electrocatalyst was prepared by a sulfite-complex route for application in a proton exchange membrane (PEM) water electrolyzer. The physicochemical properties of the IrO2 catalyst were studied by termogravimetry-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The electrochemical activity of this catalyst for oxygen evolution was investigated in a single cell PEM electrolyzer consisting of a Pt/C cathode and a Nafion membrane. A current density of 1.26 A cm(-2) was obtained at 1.8 V and a stable behavior during steady-state operation at 80 degrees C was recorded. The Tafel plots for the overall electrochemical process indicated a slope of about 80 mV dec(-1) in a temperature range from 25 degrees C to 80 degrees C. The kinetic and ohmic activation energies for the electrochemical process were 70.46 kJ mol(-1) and 13.45 kJ mol(-1), respectively. A short stack (3 cells of 100 cm(2) geometrical area) PEM electrolyzer was investigated by linear voltammetry, impedance spectroscopy and chrono-amperometric measurements. The amount of H-2 produced was 80 lh(-2) at 60 A under 330 W of applied electrical power. The stack electrical efficiency at 60 A and 75 degrees C was 70% and 81% with respect to the low and high heating value of hydrogen, respectively. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

引用

页码：5558 / 5568

页数：11

共 55 条

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