纳米孔
析氧
铱
化学
催化作用
纳米材料
电催化剂
分解水
阳极
氧化物
无机化学
化学工程
电化学
纳米技术
电极
材料科学
物理化学
有机化学
工程类
光催化
作者
Swarnendu Chatterjee,Saad Intikhab,Lauren A. Profitt,Yawei Li,Varun Natu,Ramchandra Gawas,Joshua Snyder
标识
DOI:10.1016/j.jcat.2020.11.038
摘要
The dearth of appropriate electrocatalysts for stable anodic water splitting, oxygen evolution reaction (OER), in acid has given rise to concerted efforts toward making iridium-based high aspect ratio nanomaterials, as iridium and its higher valent oxides have been shown time and again to exhibit the most optimal balance between activity and durability. Here, we show a dealloying strategy to synthesize free-standing 3D, oxide skinned nanoporous Ir electrocatalysts (np-Ir) with demonstrated enhanced activity and durability in comparison to more traditional IrOx nanoparticulate catalysts. The metallic core and absence of any binder/support result in low electrode and charge transfer resistance, ultimately giving rise to lower OER overpotentials and improved activity.
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