Dealloyed Nanoporous Pt-Based Alloys as High Performance Anode Catalysts for Direct Alcohol Fuel Cells

被引：4

作者：

Deepthi, Koolath Ramakrishnan ^{[1
,2
]}

Imai, Tsubasa ^{[3
]}

Xu, Ya ^{[1
]}

Dakshanamoorthy, Arivuoli ^{[2
]}

Ramesh, Gubbala V. ^{[1
]}

Abe, Hideki ^{[1
]}

机构：

[1] Natl Inst Mat Sci, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

[2] Anna Univ, Ctr Crystal Growth, Madras 600025, Tamil Nadu, India

[3] Saitama Univ, Grad Sch Sci & Engn, 255 Shimo Okubo, Saitama 3388570, Japan

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2017年 / 17卷 / 05期

关键词：

Nanoporous; Dealloying; Electro-Oxidation; Direct Alcohol Fuel Cell; METHANOL ELECTROOXIDATION; OXYGEN REDUCTION; NANOARCHITECTONICS; ELECTROCATALYSTS; PLATINUM; OXIDATION; EVOLUTION;

D O I：

10.1166/jnn.2017.13082

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pt-based nanoporous alloys of platinum aluminum (np-PtAl), platinum aluminum nickel (np-PtAlNi) and platinum aluminum cobalt (np-PtAlCo) were synthesized from the respective bulk alloys through a slow dealloying process in 1 M NaOH aqueous solution at room temperature. Powder X-ray diffraction (pXRD) indicated the incorporation of Co/Ni metals in PtAl matrices. Transmission electron microscope (TEM) exposed the nanoporous nature of the synthesized nanoporous alloys and the elemental mapping by Energy Dispersion Spectroscope (EDS) exhibited the uniform distribution of respective elements in the nanoporous alloys. The np-PtAlNi demonstrated much higher mass activity and durability for the electro-oxidation of methanol and ethanol than the np-PtAl, np-PtAlCo or commercial Pt nanoparticles (Pt-NPs, particle size <50 nm). Also the np-PtAlNi has better CO-poisoning tolerance than the np-PtAl, np-PtAlCo or commercial Pt NPs. The incorporation of Ni/Co elements have reduced the use of precious metal Pt but improved the activity towards alcohol oxidation. The synthesized nanoporous alloys are promising candidates as anode catalysts in Direct Alcohol Fuel Cells (DAFCs).

引用

页码：2991 / 2998

页数：8

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