Ultrathin Laminar Ir Superstructure as Highly Efficient Oxygen Evolution   Electrocatalyst in Broad pH Range

doi:10.1021/acs.nanolett.6b01554

CORC > 北京大学 > 工学院

	Ultrathin Laminar Ir Superstructure as Highly Efficient Oxygen Evolution Electrocatalyst in Broad pH Range
	Pi, Yecan ; Zhang, Nan ; Guo, Shaojun ; Guo, Jun ; Huang, Xiaoqing
刊名	NANO LETTERS
	2016
关键词	Iridium nanosheets three dimensional oxygen evolution reaction electrocatalysis REDUCTION REACTION FUEL-CELLS PALLADIUM NANOSHEETS ENERGY-CONVERSION CATALYSTS NANOCRYSTALS ELECTROLYTE IRIDIUM OER
DOI	10.1021/acs.nanolett.6b01554
英文摘要	Shape-controlled noble metal nanocrystals (NCs), such as Au, Ag, Pt, Pd, Ru, and Rh are of great success due to their new and enhanced properties and applications in chemical conversion, fuel cells, and sensors, but the realization of shape control of Ir-NCs for achieving enhanced electrocatalysis remains a significant challenge. Herein, we report an efficient solution method for a new class of three-dimensional (3D) Ir superstructure that consists of ultrathin Ir nanosheets as subunits. Electrochemical studies show that it delivers the excellent electrocatalytic activity toward oxygen evolution reaction (OER) in alkaline condition with an onset potential at 1.43 V versus reversible hydrogen electrode (RHE) and a very low Tafel slope of 32.7 mV decade(-1). In particular, it even shows superior performance for OER in acidic solutions with the low onset overpotential of 1.45 V versus RHE and small Tafel slope of 40.8 mV decade(-1), which are much better than those of small Ir nanoparticles (NPs). The 3D Ir superstructures also exhibit good stability under acidic condition with the potential shift of less than 20 mV after 8 h i-t test. The present work highlights the importance of tuning 3D structures of Ir NCs for enhancing OER performance.; Soochow University; Peking University, Young Thousand Talented Program; National Natural Science Foundation of China [21571135]; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD); SCI(E); EI; PubMed; ARTICLE; guosj@pku.edu.cn; hxq006@suda.edu.cn; 7; 4424-4430; 16
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/433509]
专题	工学院
推荐引用方式 GB/T 7714	Pi, Yecan,Zhang, Nan,Guo, Shaojun,et al. Ultrathin Laminar Ir Superstructure as Highly Efficient Oxygen Evolution Electrocatalyst in Broad pH Range[J]. NANO LETTERS,2016.
APA	Pi, Yecan,Zhang, Nan,Guo, Shaojun,Guo, Jun,&Huang, Xiaoqing.(2016).Ultrathin Laminar Ir Superstructure as Highly Efficient Oxygen Evolution Electrocatalyst in Broad pH Range.NANO LETTERS.
MLA	Pi, Yecan,et al."Ultrathin Laminar Ir Superstructure as Highly Efficient Oxygen Evolution Electrocatalyst in Broad pH Range".NANO LETTERS (2016).