Biaxially strained PtPb/Pt core/shell nanoplate boosts oxygen reduction   catalysis

doi:10.1126/science.aah6133

CORC > 北京大学 > 工学院

	Biaxially strained PtPb/Pt core/shell nanoplate boosts oxygen reduction catalysis
	Bu, Lingzheng ; Zhang, Nan ; Guo, Shaojun ; Zhang, Xu ; Li, Jing ; Yao, Jianlin ; Wu, Tao ; Lu, Gang ; Ma, Jing-Yuan ; Su, Dong ; Huang, Xiaoqing
刊名	SCIENCE
	2016
关键词	COMPUTATIONAL DESIGN PLATINUM ELECTROCATALYSTS SURFACES NANOPARTICLES NANOCRYSTALS NANOSHEETS METHANOL FACETS ALLOY
DOI	10.1126/science.aah6133
英文摘要	Compressive surface strains have been necessary to boost oxygen reduction reaction (ORR) activity in core/shell M/platinum (Pt) catalysts (where M can be nickel, cobalt, or iron). We report on a class of platinum-lead/platinum (PtPb/Pt) core/shell nanoplate catalysts that exhibit large biaxial strains. The stable Pt (110) facets of the nanoplates have high ORR specific and mass activities that reach 7.8 milliampere (mA) per centimeter squared and 4.3 ampere per milligram of platinum at 0.9 volts versus the reversible hydrogen electrode (RHE), respectively. Density functional theory calculations reveal that the edge-Pt and top (bottom)-Pt (110) facets undergo large tensile strains that help optimize the Pt-O bond strength. The intermetallic core and uniform four layers of Pt shell of the PtPb/Pt nanoplates appear to underlie the high endurance of these catalysts, which can undergo 50,000 voltage cycles with negligible activity decay and no apparent structure and composition changes.; National Key Research and Development Program of China [2016YEB0100201]; National Natural Science Foundation of China [21571135, 51671003]; Ministry of Science and Technology [2016YFA0204100]; Soochow University; Peking University; Young Thousand Talented Program; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD); U.S. Department of Energy (DOE), Office of Basic Energy Science [DE-SC0012704]; U.S. Army Research Office via the MURI grant [W911NF-11-1-0353]; SCI(E); ARTICLE; guosj@pku.edu.cn; dsu@bnl.gov; hxq006@suda.edu.cn; 6318; 1410-1414; 354
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/458028]
专题	工学院
推荐引用方式 GB/T 7714	Bu, Lingzheng,Zhang, Nan,Guo, Shaojun,et al. Biaxially strained PtPb/Pt core/shell nanoplate boosts oxygen reduction catalysis[J]. SCIENCE,2016.
APA	Bu, Lingzheng.,Zhang, Nan.,Guo, Shaojun.,Zhang, Xu.,Li, Jing.,...&Huang, Xiaoqing.(2016).Biaxially strained PtPb/Pt core/shell nanoplate boosts oxygen reduction catalysis.SCIENCE.
MLA	Bu, Lingzheng,et al."Biaxially strained PtPb/Pt core/shell nanoplate boosts oxygen reduction catalysis".SCIENCE (2016).