Počet záznamů: 1
Polymer anion-selective membrane for electrolytic water splitting: the impact of a liquid electrolyte composition on the process parameters and long-term stability
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SYSNO ASEP 0427362 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Polymer anion-selective membrane for electrolytic water splitting: the impact of a liquid electrolyte composition on the process parameters and long-term stability Tvůrce(i) Hnát, J. (CZ)
Paidar, M. (CZ)
Schauer, Jan (UMCH-V) RID
Bouzek, K. (CZ)Zdroj.dok. International Journal of Hydrogen Energy. - : Elsevier - ISSN 0360-3199
Roč. 39, č. 10 (2014), s. 4779-4787Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova water electrolysis ; alkaline environment ; polymer electrolyte Vědní obor RIV CD - Makromolekulární chemie Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000334130800002 EID SCOPUS 84897921164 DOI 10.1016/j.ijhydene.2014.01.086 Anotace In the present study the impact of KOH replacement by a NaHCO3 or Na2CO3 solution on the performance of alkaline water electrolysis and the life-time of an anion-selective polymer electrolyte was assessed. In the first instance, the impact of the electrolyte composition on the kinetics of the electrode reactions was studied. Subsequently the ionic conductivity of the membrane, in the form of individual anions, and the efficiency of the alkaline water electrolysis process were evaluated by means of electrochemical impedance spectroscopy and a laboratory single-cell alkaline water electrolyzer. The anion used was observed to make a significant impact both on the ionic conductivity as well as on the kinetics of the anode reaction, resulting in reduced electrolysis efficiency. A stability test revealed kinetics of chemical degradation of the polymer anion-selective membrane in a Na2CO3 solution similar to those in a KOH environment at 70 °C. An alternative approach of decreasing the temperature to 50 °C prolonged the chemical stability and made less impact on the process efficiency. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2015
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