DOI: 10.1016/j.scib.2020.07.021
论文题名: Spiny Pd/PtFe core/shell nanotubes with rich high-index facets for efficient electrocatalysis
作者: Tao L. ; Xia Z. ; Zhang Q. ; Sun Y. ; Li M. ; Yin K. ; Gu L. ; Guo S.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期: 1 起始页码: 44
结束页码: 51
语种: 英语
中文关键词: Alcohol oxidation
; High-indexed surface
; Oxygen reduction reaction
; Pt-alloyed nanotubes
; Stranski-Krastanov growth
英文关键词: Anodic oxidation
; Catalysis
; Catalysts
; Electrocatalysis
; Electrolytic reduction
; Fuel cells
; Morphology
; Nanotubes
; Palladium
; Carbon-supported Pt nanoparticles
; Electrochemical active surface areas
; Higher efficiency
; Noble metal catalysts
; Oxygen reduction catalysis
; Stranski-Krastanov growth
; Structural degradation
; Structural durability
; Platinum alloys
英文摘要: The performance of fuel-cell related electrocatalysis is highly dependent on the morphology, size and composition of a given catalyst. In terms of rational design of Pt-based catalyst, one-dimensional (1D) ultrafine Pt alloy nanowires (NWs) are considered as a commendable model for enhanced catalysis on account of their favorable mass/charge transfer and structural durability. However, in order to achieve the noble metal catalysts in higher efficiency and lower cost, building high-index facets and shaping hollow interiors should be integrated into 1D Pt alloy NWs, which has rarely been done so far. Here, we report the first synthesis of a class of spiny Pd/PtFe core/shell nanotubes (SPCNTs) constructed by cultivating PtFe alloy branches with rich high-index facets along the 1D removable Pd supports, which is driven by the galvanic dissolution of Pd substrates concomitant with Stranski-Krastanov (S-K) growth of Pt and Fe, for achieving highly efficient fuel-cells-related electrocatalysis. This new catalyst can even deliver electrochemical active surface area (ECSA) of 62.7 m2 gPt−1, comparable to that of commercial carbon-supported Pt nanoparticles. With respect to oxygen reduction catalysis, the SPCNTs showcase the remarkable mass and specific activity of 2.71 A mg−1 and 4.32 mA cm−2, 15.9 and 16.0 times higher than those of commercial Pt/C, respectively. Also, the catalysts exhibit extraordinary resistance to the activity decay and structural degradation during 50,000 potential cycles. Moreover, the SPCNTs serve as a category of efficient and stable catalysts towards anodic alcohol oxidation. © 2020 Science China Press Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170405
Appears in Collections: 气候变化与战略
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作者单位: Department of Materials Science & Engineering, College of Engineering, Peking University, Beijing, 100871, China; BIC-ESAT, College of Engineering, Peking University, Beijing, 100871, China; Beijing National Laboratory for Condensed Matter and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing, 100871, China
Recommended Citation:
Tao L.,Xia Z.,Zhang Q.,et al. Spiny Pd/PtFe core/shell nanotubes with rich high-index facets for efficient electrocatalysis[J]. Science Bulletin,2021-01-01,66(1)