气候变化领域集成服务门户(CCPortal): Interface modulation of twinned PtFe nanoplates branched 3D architecture for oxygen reduction catalysis

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DOI	10.1016/j.scib.2019.10.012
	Interface modulation of twinned PtFe nanoplates branched 3D architecture for oxygen reduction catalysis
	Luo M.; Qin Y.; Li M.; Sun Y.; Li C.; Li Y.; Yang Y.; Lv F.; Wu D.; Zhou P.; Guo S.
发表日期	2020
ISSN	20959273
起始页码	97
结束页码	104
卷号	65 期号:2
英文摘要	Highly-branched dendritic Pt-based nanocrystals possess great potential in catalyzing the oxygen reduction reaction (ORR), but encounter performance ceiling due to their poor thermal and electrochemical stability. Here, we present a novel PtFe nanodendrites (NDs) branched with two-dimensional (2D) twinned nanoplates rather than conventional 1D nanowires, which breaks the ORR performance ceiling of dendritic catalysts by inducing the unique Pt-skin configuration via rationally thermal treatment. By further hybridizing the Pt-skin PtFe NDs/C with amino-functionalized ionic liquids (ILs), we achieve an unprecedented mass activity of 3.15 A/mgPt at 0.9 V versus reversible hydrogen electrode (RHE) in the PtFe-based ORR electrocatalytic system. They also show excellent electrocatalytic durability for ORR with negligible activity decay and no apparent structural change after 20,000 cycles, in sharp contrast to the nanowires branched PtFe NDs counterpart. The remarkable catalytic performance is attributed to a combination of several structural features, including 2D morphology, twin boundary, partially ordered phase and strong coordination with amino group. This work highlights the significance of stabilizing electrocatalytic structures via morphology tuning, which thus enables further surface and interface modification for performance breakthrough in ORR electrocatalysis. © 2019 Science China Press
关键词	Dendrities Ionic liquid Nanoplates Oxygen reduction reaction PtFe alloy
英文关键词	Binary alloys; Catalysis; Electrocatalysis; Electrolytic reduction; Ionic liquids; Iron alloys; Morphology; Nanowires; Dendrities; Electrochemical stabilities; Functionalized ionic liquids; Nanoplates; Oxygen reduction catalysis; Oxygen reduction reaction; Pt-Fe alloys; Reversible hydrogen electrodes; Platinum alloys
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207142
作者单位	Department of Materials Science & Engineering, College of Engineering, Peking University, Beijing, 100871, China; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China; BIC-ESAT, College of Engineering, Peking University, Beijing, 100871, China; Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing, 100871, China
推荐引用方式 GB/T 7714	Luo M.,Qin Y.,Li M.,et al. Interface modulation of twinned PtFe nanoplates branched 3D architecture for oxygen reduction catalysis[J],2020,65(2).
APA	Luo M..,Qin Y..,Li M..,Sun Y..,Li C..,...&Guo S..(2020).Interface modulation of twinned PtFe nanoplates branched 3D architecture for oxygen reduction catalysis.Science Bulletin,65(2).
MLA	Luo M.,et al."Interface modulation of twinned PtFe nanoplates branched 3D architecture for oxygen reduction catalysis".Science Bulletin 65.2(2020).