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Ultra-low loading of IrO2 with an inverse-opal structure in a polymer-exchange membrane water electrolysis
In this study, an iridium oxide (IrO2) inverse-opal membrane-electrode assembly (inverse-opal MEA) was fabricated via the decal-transfer method for an anode in polymer-electrolyte membrane water electrolysis (PEMWE) to decrease the loading of the noble catalyst. Electrodeposition parameters includin...
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Published in: | Nano energy 2019-04, Vol.58, p.158-166 |
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Main Authors: | , , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | In this study, an iridium oxide (IrO2) inverse-opal membrane-electrode assembly (inverse-opal MEA) was fabricated via the decal-transfer method for an anode in polymer-electrolyte membrane water electrolysis (PEMWE) to decrease the loading of the noble catalyst. Electrodeposition parameters including current and total number of cycles were investigated to achieve the IrO2 inverse-opal electrode. The inverse-opal MEA with ultra-low loading exhibited outstanding performance that exceeded or was comparable to that obtained in other PEMWE studies. Additionally, it exhibited higher performance and lower ohmic and charge-transfer resistance when compared with that of commercial IrO2. Furthermore, the performance corresponded to the highest mass activity reported to date since the loading in the inverse-opal MEA was ultra-low. This was because the inverse-opal structure improved electron transfer owing to the interconnected pores and increased the surface area due to high porosity, thereby leading to the enhanced utilization of the catalyst.
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•IrO2 inverse-opal membrane-electrode assembly (MEA) in polymer electrolyte membrane water electrolysis is prepared.•The inverse-opal MEA exhibited high performance despite its ultra-low loading.•The inverse-opal MEA showed the highest mass activity reported to date owing to its enhanced utilization of catalyst. |
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ISSN: | 2211-2855 |
DOI: | 10.1016/j.nanoen.2019.01.043 |