气候变化领域集成服务门户(CCPortal): Discovery of crystal structure-stability correlation in iridates for oxygen evolution electrocatalysis in acid

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DOI	10.1039/d0ee01389g
	Discovery of crystal structure-stability correlation in iridates for oxygen evolution electrocatalysis in acid
	Song C.W.; Lim J.; Bae H.B.; Chung S.-Y.
发表日期	2020
ISSN	17545692
起始页码	4178
结束页码	4188
卷号	13 期号:11
英文摘要	One of the critical bottlenecks in many energy-conversion devices associated with the oxygen evolution reaction (OER) is to find adequate catalysts that both show high activity and endure extreme pH conditions of an electrolyte under anodic potentials. As Ir-based compositions are regarded to show better resistance to acidic environments than any other transition metals, a surge of research on many complex iridates recently has been carried out. However, the intrinsic structure-property relationship in iridates remains elusive, although several examples showing exceptional OER activity were reported. Here we discover that eleven different AxIryOz-type oxides (A = Ca, Sr, Ba, Y, Pr, Nd) with high OER activity can be categorized into three distinct groups in terms of the [IrO6] connection geometry. Furthermore, a notable common correlation among the crystal structure, activity variation, and stability during the OER is identified in each of the groups. If the iridates consist of a strong edge-or face-sharing [IrO6] configuration, their stability and activity are preserved during a remarkably large number of anodic cycles. In addition to comparing the OER performance between many high-activity iridates, our findings emphasize that the [IrO6] connectivity is a crucial structural factor governing the overall longevity of Ir-based catalysts. © The Royal Society of Chemistry.
英文关键词	Catalysts; Electrocatalysis; Electrolytes; Energy conversion; Oxygen; Oxygen evolution reaction; Transition metals; Acidic environment; Anodic potentials; Connection geometry; Energy conversion devices; Intrinsic structures; Oxygen evolution reaction (oer); Structural factor; Structure-stability correlation; Crystal structure; catalysis; catalyst; connectivity; correlation; crystal structure; electrolyte; longevity; oxygen; reaction kinetics
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189465
作者单位	Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea; Kaist Analysis Center, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
推荐引用方式 GB/T 7714	Song C.W.,Lim J.,Bae H.B.,et al. Discovery of crystal structure-stability correlation in iridates for oxygen evolution electrocatalysis in acid[J],2020,13(11).
APA	Song C.W.,Lim J.,Bae H.B.,&Chung S.-Y..(2020).Discovery of crystal structure-stability correlation in iridates for oxygen evolution electrocatalysis in acid.Energy & Environmental Science,13(11).
MLA	Song C.W.,et al."Discovery of crystal structure-stability correlation in iridates for oxygen evolution electrocatalysis in acid".Energy & Environmental Science 13.11(2020).