Electrochemically active Ir NPs on graphene for OER in acidic aqueous electrolyte investigated by in situ and ex situ spectroscopies
學年 107
學期 2
出版（發表）日期 2019-03-01
作品名稱 Electrochemically active Ir NPs on graphene for OER in acidic aqueous electrolyte investigated by in situ and ex situ spectroscopies
作品名稱（其他語言）
著者 Velasco-Vélez, J. J.; Jones, T. E.; Streibel, V.; Hävecker, M.; Chuang, C.-H.; Frevel, L.; Plodinec, M.; Centeno, A.; Zurutuza, A.; Wang, R.; Arrigo, R.; Mom, R.; Hofmann, S.; Schlögl, R.; Knop-Gericke, A.
單位
出版者
著錄名稱、卷期、頁數 Surface Science 681, p.1-8
摘要 An electrode for the oxygen evolution reaction based on a conductive bi-layered free standing graphene support functionalized with iridium nanoparticles was fabricated and characterized by means of potentiometric and advanced X-ray spectroscopic techniques. It was found that the electrocatalytic activity of iridium nanoparticles is associated to the formation of Ir 5d electron holes. Strong Ir 5d and O 2p hybridization, however, leads to a concomitant increase O 2p hole character, making oxygen electron deficient and susceptible to nucleophilic attack by water. Consequently, more efficient electrocatalysts can be synthesized by increasing the number of electron-holes shared between the metal d and oxygen 2p.
關鍵字 Photoelectron spectroscopy;OER;Ir nanoparticles;Graphene membrane;Aqueous electrolyte
語言 en
ISSN 0039-6028
期刊性質 國外
收錄於 SCI Scopus
產學合作
通訊作者 velasco@fhi-berlin.mpg.der
審稿制度 是
國別 NLD
公開徵稿
出版型式 ,電子版,紙本
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