Pem Electrolysis
ARTICLE IN PRESS
Energy 32 (2007) 431–436 www.elsevier.com/locate/energy
Hydrogen production by advanced proton exchange membrane (PEM) water electrolysers—Reduced energy consumption by improved electrocatalysis
A. MarshallÃ,1, B. Børresen, G. Hagen{, M. Tsypkin, R. Tunold
Department of Materials Technology, Group of Electrochemistry, NTNU, 7491 Trondheim, Norway Received 14 October 2005
Abstract Proton exchange membrane (PEM) water electrolysis systems offers several advantages over traditional technologies including greater energy efficiency, higher production rates, and more compact design. Normally in these systems, the anode has the largest overpotential at typical operating current densities. By development of the electrocatalytic material used for the oxygen evolving electrode, great improvements in efficiency can be made. We find that using cyclic voltammetry and steady state polarisation analysis, enables us to separate the effects of true specific electrocatalytic activity and active surface area. Understanding these two factors is critical in developing better electrocatalytic materials in order to further improve the performance of PEM water electrolysis cells. The high current performance of a PEM water electrolysis cell using these oxides as the anode electrocatalyst has also been examined by steady state polarisation measurements and electrochemical impedance spectroscopy. Overall the best cell voltage obtained is 1.567 V at 1 A cmÀ2 and 80 1C was achieved when using Nafion 115 as the electrolyte membrane. r 2006 Elsevier Ltd. All rights reserved.
Keywords: Electrocatalysis; Hydrogen production; PEM water electrolysis
1. Introduction Carbon free hydrogen can be produced using water electrolysis. Proton exchange membrane (PEM) water electrolysis systems offers several advantages over traditional technologies including greater energy efficiency, higher production rates, and more compact design [1]. This method of hydrogen production is
Energy 32 (2007) 431–436 www.elsevier.com/locate/energy
Hydrogen production by advanced proton exchange membrane (PEM) water electrolysers—Reduced energy consumption by improved electrocatalysis
A. MarshallÃ,1, B. Børresen, G. Hagen{, M. Tsypkin, R. Tunold
Department of Materials Technology, Group of Electrochemistry, NTNU, 7491 Trondheim, Norway Received 14 October 2005
Abstract Proton exchange membrane (PEM) water electrolysis systems offers several advantages over traditional technologies including greater energy efficiency, higher production rates, and more compact design. Normally in these systems, the anode has the largest overpotential at typical operating current densities. By development of the electrocatalytic material used for the oxygen evolving electrode, great improvements in efficiency can be made. We find that using cyclic voltammetry and steady state polarisation analysis, enables us to separate the effects of true specific electrocatalytic activity and active surface area. Understanding these two factors is critical in developing better electrocatalytic materials in order to further improve the performance of PEM water electrolysis cells. The high current performance of a PEM water electrolysis cell using these oxides as the anode electrocatalyst has also been examined by steady state polarisation measurements and electrochemical impedance spectroscopy. Overall the best cell voltage obtained is 1.567 V at 1 A cmÀ2 and 80 1C was achieved when using Nafion 115 as the electrolyte membrane. r 2006 Elsevier Ltd. All rights reserved.
Keywords: Electrocatalysis; Hydrogen production; PEM water electrolysis
1. Introduction Carbon free hydrogen can be produced using water electrolysis. Proton exchange membrane (PEM) water electrolysis systems offers several advantages over traditional technologies including greater energy efficiency, higher production rates, and more compact design [1]. This method of hydrogen production is
References: [1] Oberlin R, Fischer M. Status of the membral process for water electrolysis. In: Veziroglu T, Getoff N, Weinzierl P, editors. Hydrogen energy progress VI, proceedings of the sixth world hydrogen energy conference. Oxford: Pergamon Press; 1986. p. 333–40.