CAS OpenIR  > 中科院上海应用物理研究所2011-2020年
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; Si, R; Ma, C; Yang, JL; Zeng, J
2020
Source PublicationNANO LETTERS
ISSN1530-6984
Volume20Issue:2Pages:1403-1409
Subtype期刊论文
AbstractExploring 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.
KeywordMEMBRANE FUEL-CELLS CATALYTIC-ACTIVITY PLATINUM NANOCRYSTALS EVOLUTION SHAPE NANOPARTICLES DURABILITY CHALLENGES STABILITY
DOI10.1021/acs.nanolett.9b05024
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/32719
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China
2.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
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
Recommended Citation
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.
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