Atomic-Level Construction of Tensile-Strained PdFe Alloy Surface toward Highly Efficient Oxygen Reduction Electrocatalysis

doi:10.1021/acs.nanolett.9b05024

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	Atomic-Level Construction of Tensile-Strained PdFe Alloy Surface toward Highly Efficient Oxygen Reduction Electrocatalysis
	Li, X ; Li, XX ; Liu, CX ; Huang, HW ; Gao, PF ; Ahmad, F ; Luo, LH ; Ye, YF ; Geng, ZG ; Wang, GX
刊名	NANO LETTERS
	2020
卷号	20 期号:2 页码:1403-1409
关键词	MEMBRANE FUEL-CELLS CATALYTIC-ACTIVITY PLATINUM NANOCRYSTALS EVOLUTION SHAPE NANOPARTICLES DURABILITY CHALLENGES STABILITY
ISSN号	1530-6984
DOI	10.1021/acs.nanolett.9b05024
文献子类	期刊论文
英文摘要	Exploring the high-performance non-Pt electrocatalysts for oxygen reduction reaction (ORR), the bottleneck process in fuel cells, is desirable but challenging. Here, we report the Pd@PdFe core-shell icosahedra as an active and durable electrocatalyst toward ORR in alkaline conditions, which feature a three-atomic-layer tensile-strained PdFe overlayer on Pd icosahedra. Our optimized catalyst shows 2.8-fold enhancement in mass activity and 6.9-fold enhancement in specific activity than commercial Pt/C catalyst toward ORR, representing one of the best non-Pt electrocatalysts. Moreover, the boosted ORR catalysis is strongly supported by the assembled fuel cell performance using Pd@PdFe core-shell icosahedra as the cathode electrocatalyst. The density functional theory calculations reveal that the synergistic coupling of tensile strain and alloy effects enables the optimum binding strength for intermediates, thus causing the maximum activity. The present work suggests the coupling between multiple surface modulations endows larger room for the rational design of remarkable catalysts.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32719]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 2.Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China 3.Chinese Acad Sci, Educ Inst Univ Sci & Technol China,Key Lab Strong, Anhui Higher Educ Inst,Key Lab Surface & Interfac, Dept Chem Phys,Natl Synchrotron Radiat Lab,Hefei, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
推荐引用方式 GB/T 7714	Li, X,Li, XX,Liu, CX,et al. Atomic-Level Construction of Tensile-Strained PdFe Alloy Surface toward Highly Efficient Oxygen Reduction Electrocatalysis[J]. NANO LETTERS,2020,20(2):1403-1409.
APA	Li, X.,Li, XX.,Liu, CX.,Huang, HW.,Gao, PF.,...&Zeng, J.(2020).Atomic-Level Construction of Tensile-Strained PdFe Alloy Surface toward Highly Efficient Oxygen Reduction Electrocatalysis.NANO LETTERS,20(2),1403-1409.
MLA	Li, X,et al."Atomic-Level Construction of Tensile-Strained PdFe Alloy Surface toward Highly Efficient Oxygen Reduction Electrocatalysis".NANO LETTERS 20.2(2020):1403-1409.