Abstract:
:Nanoporous electrodes have received great attention because of their unique electrochemical properties. Here, the electrocatalytic oxygen evolution reaction (OER) activities at porous Pt layers with pore dimensions in the microporous range were examined. The OER activity of the porous Pt layers in acidic media increased as the porosity of the Pt layers increased, and the highest OER activity possessed an overpotential that was 270 mV lower than that of a bulk flat electrode. The porous Pt layers did not exhibit electrocatalytic enhancement for OER in basic media, wherein the surface area of the pores was not utilized for OER. The differentiated OER activity of the porous Pt layers demonstrated the different accessibility of reactants in OER: water and hydrated hydroxide ions. The roles of the pores in the Pt layers during OER were investigated using different Pt structures. The work will give insight into the electrochemistry of microporous electrode structures.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Lim T,Sung M,Kim Jdoi
10.1038/s41598-017-15688-9subject
Has Abstractpub_date
2017-11-13 00:00:00pages
15382issue
1issn
2045-2322pii
10.1038/s41598-017-15688-9journal_volume
7pub_type
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