析氧
铱
材料科学
分解水
溶解
电催化剂
制氢
催化作用
化学工程
纳米颗粒
电化学
纳米技术
化学
电极
物理化学
光催化
有机化学
工程类
作者
Guoqiang Zhao,Zhouxin Luo,Baohua Zhang,Yaping Chen,Xiangzhi Cui,Jian Chen,Yongfeng Liu,Mingxia Gao,Hongge Pan,Wenping Sun
出处
期刊:Nano Research
[Springer Nature]
日期:2023-01-11
卷期号:16 (4): 4767-4774
被引量:35
标识
DOI:10.1007/s12274-022-5240-3
摘要
Proton exchange membrane water electrolyzer (PEMWE) driven by renewable electricity is a promising technique toward green hydrogen production, but the corrosive environment and high working potential pose severe challenges for developing advanced electrocatalysts for the oxygen evolution reaction (OER). Although Ir-based materials possess relatively balanced activity and stability for the OER, their dissolution behavior cannot be neglected, in particular under high working potentials. In this work, iridium dioxide (IrO2) nanoparticles (NPs) were anchored on the surface of exfoliated h-boron nitride (BN) nanosheets (NSs) toward the OER reaction in acid media. Highly active Ir(V) species were stabilized by the epitaxial interface between IrO2 and h-BN, and therefore the IrO2/BN delivered stable performance at increased working potentials, while the activity of bare IrO2 NPs without h-BN support decreased rapidly. Also, the smaller lattice spacing of h-BN induced compressive strain for IrO2, resulting in improved activity. Our results demonstrate the feasibility of stabilizing highly active Ir(V) species for the OER in acid media by constructing robust interface and provide new possibilities toward designing advanced heterostructured electrocatalysts.
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