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Statements

Subject Item
n2:RIV%2F60461373%3A22310%2F14%3A43897732%21RIV15-MPO-22310___
rdf:type
skos:Concept n18:Vysledek
rdfs:seeAlso
http://www.sciencedirect.com/science/article/pii/S0360319913030206
dcterms:description
Polymer electrolyte membrane (PEM) water el ectrolysis is an attra ctive way of producing carbon-free hydrogen. One of the drawbac ks of this method is the need for precious metalbased electrocatalysts. This calls for a highly efficient utilization of the precious metal, which can be obtained by dispersi ng the precious meta l compound onto a catalyst support. Electrocatalysts with 50, 70 and 90 wt.% of IrO2 on a TaC support were tested in a laboratory PEM water electrolyser and compared with pure IrO2. The temperature was set at 90, 110, 120 and 130 C respectively and the cell voltage was varied between 1.4 and 1.8 V. The load characteristics and electrochemical impedance spectra were obtained and compared for a range of electrocatalysts. The highest current densities and the lowest charge transfer and cell resistances were found for the 70 wt.% IrO2 electrocatalyst. By contrast, the pure IrO2 electrocatalyst showed the lowest current densities and the highest charge transfer and cell resistance. For example, the relative difference in current densities between the 70 wt.% IrO2 and the pure IrO2 electrocatalyst attained 36% at 130 C and 1.7 V. All of the supported electrocatalysts showed a higher efficiency of utilization of the precious metal than the pure IrO2 Polymer electrolyte membrane (PEM) water el ectrolysis is an attra ctive way of producing carbon-free hydrogen. One of the drawbac ks of this method is the need for precious metalbased electrocatalysts. This calls for a highly efficient utilization of the precious metal, which can be obtained by dispersi ng the precious meta l compound onto a catalyst support. Electrocatalysts with 50, 70 and 90 wt.% of IrO2 on a TaC support were tested in a laboratory PEM water electrolyser and compared with pure IrO2. The temperature was set at 90, 110, 120 and 130 C respectively and the cell voltage was varied between 1.4 and 1.8 V. The load characteristics and electrochemical impedance spectra were obtained and compared for a range of electrocatalysts. The highest current densities and the lowest charge transfer and cell resistances were found for the 70 wt.% IrO2 electrocatalyst. By contrast, the pure IrO2 electrocatalyst showed the lowest current densities and the highest charge transfer and cell resistance. For example, the relative difference in current densities between the 70 wt.% IrO2 and the pure IrO2 electrocatalyst attained 36% at 130 C and 1.7 V. All of the supported electrocatalysts showed a higher efficiency of utilization of the precious metal than the pure IrO2
dcterms:title
Performance of a PEM water electrolyser using a TaC-supported iridium oxide electrocatalyst Performance of a PEM water electrolyser using a TaC-supported iridium oxide electrocatalyst
skos:prefLabel
Performance of a PEM water electrolyser using a TaC-supported iridium oxide electrocatalyst Performance of a PEM water electrolyser using a TaC-supported iridium oxide electrocatalyst
skos:notation
RIV/60461373:22310/14:43897732!RIV15-MPO-22310___
n3:aktivita
n19:P
n3:aktivity
P(FR-TI2/442)
n3:cisloPeriodika
7
n3:dodaniDat
n9:2015
n3:domaciTvurceVysledku
n7:2059428 n7:4365275 n7:7574592 n7:5910935
n3:druhVysledku
n20:J
n3:duvernostUdaju
n5:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
36153
n3:idVysledku
RIV/60461373:22310/14:43897732
n3:jazykVysledku
n15:eng
n3:klicovaSlova
Electrochemical impedance spectroscopy; Load characteristics; Cell resistance; Polarization resistance; Tantalum carbide; PEM water electrolysis
n3:klicoveSlovo
n10:Tantalum%20carbide n10:Polarization%20resistance n10:PEM%20water%20electrolysis n10:Electrochemical%20impedance%20spectroscopy n10:Load%20characteristics n10:Cell%20resistance
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[407932C66EB7]
n3:nazevZdroje
International Journal of Hydrogen Energy
n3:obor
n4:CG
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
5
n3:projekt
n8:FR-TI2%2F442
n3:rokUplatneniVysledku
n9:2014
n3:svazekPeriodika
39
n3:tvurceVysledku
Paidar, Martin Bouzek, Karel Christensen, Erik Polonský, Jakub Mazúr, Petr
n3:wos
000331917400004
s:issn
0360-3199
s:numberOfPages
7
n16:doi
10.1016/j.ijhydene.2013.12.085
n14:organizacniJednotka
22310