PtRu/Carbon Hybrids With Different Pt:Ru Atomic Ratios Prepared by Hydrothermal Carbonization for Methanol Electro-Oxidation

被引：0

作者：

Tusi, Marcelo Marques ^{[1
]}

de Oliveira Polanco, Nataly Soares ^{[1
]}

Brandalise, Michele ^{[1
]}

Correa, Olandir Vercino ^{[1
]}

Villalba, Juan Carlo ^{[2
]}

Anaissi, Fauze Jaco ^{[2
]}

Oliveira Neto, Almir ^{[1
]}

Spinace, EstevamVitorio ^{[1
]}

机构：

[1] IPEN CNEN SP, BR-05508900 Sao Paulo, Brazil

[2] Univ Estadual Ctr Oeste UNICENTRO, BR-85040080 Guarapuava, PR, Brazil

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2011年 / 6卷 / 02期

基金：

巴西圣保罗研究基金会;

关键词：

PtRu/Carbon hybrids; hydrothermal carbonization; starch; methanol electro-oxidation; ruthenium content; PT-RU; FUEL-CELLS; ELECTROCATALYSTS; CATALYSTS; ETHANOL; REDUCTION; OXIDATION; NANOCATALYST; NANOFIBERS;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

PtRu/Carbon hybrid materials with different Pt:Ru atomic ratios (50: 50, 60: 40, 80: 20 and 90: 10) and 5 wt% of nominal metal loading were prepared by hydrothermal carbonization at 200 C using H2PtCl6 center dot 6H(2)O and RuCl3 center dot xH(2)O as metals sources and catalysts of the carbonization process and starch as carbon source and reducing agent. The obtained materials were further treated at 900 degrees C under argon and characterized by energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD) and cyclic voltammetry. The electro-oxidation of methanol was studied by cyclic voltammetry and chronoamperometry. The PtRu/Carbon materials showed Pt: Ru atomic ratios obtained by EDX similar to the nominal ones. XRD analysis showed that PtRu face-cubic centered (fcc) alloy and Ru hexagonal close-packed (hcp) phases coexist in the obtained materials. The average crystallite sizes of the PtRu (fcc) alloy phase were in the range of 10-12 nm. The material prepared with Pt: Ru atomic ratio of 50: 50 showed the best electroactivity for methanol electro-oxidation.

引用

页码：484 / 491

页数：8

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[1] Fuel cells: History and updating. A walk along two centuries [J].