析氧
材料科学
电化学
电解
化学工程
电解水
熔盐
阳极
制氢
分解水
电极
纳米技术
电解质
氢
催化作用
冶金
化学
光催化
工程类
物理化学
有机化学
生物化学
作者
Jinkyu Lim,Dongmin Park,Sun Seo Jeon,Chi‐Woo Roh,Juhyuk Choi,Daejin Yoon,Minju Park,Hye Young Jung,Hyunjoo Lee
标识
DOI:10.1002/adfm.201704796
摘要
Abstract Electrochemical water splitting is promising for utilizing intermittent renewable energy. The sluggish kinetics of the oxygen evolution reaction (OER), however, is a bottleneck in obtaining high efficiency. Only a few OER electrocatalysts have been developed for the use in acidic media despite the importance of a proton exchange membrane (PEM) water electrolyzer. IrO 2 is the only material that is both active and stable for the OER in highly corrosive acidic conditions. Herein, a facile and scalable synthesis of ultrathin IrO 2 nanoneedles is reported with a diameter of 2 nm using a modified molten salt method. The activity and durability for the OER are significantly enhanced on the ultrathin IrO 2 nanoneedles, compared to conventional nanoparticles. The ultrathin nanoneedles are successfully introduced to a PEM electrolyzer single cell with the enhanced cell performance.
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