Platinum-Decorated Ruthenium Nanoparticles for Enhanced Methanol Electrooxidation

被引：25

作者：

Chen, Ching-Hsiang ^{[1
]}

Sarma, Loka Subramanyam ^{[1
]}

Wang, Di-Yan ^{[2
]}

Lai, Feng-Ju ^{[1
]}

Al Andra, Cun-Cun ^{[1
]}

Chang, Shi-Hong ^{[1
]}

Liu, Din-Goa ^{[3
]}

Chen, Chia-Chun ^{[2
,4
]}

Lee, Jyh-Fu ^{[3
]}

Hwang, Bing-Joe ^{[1
,3
]}

机构：

[1] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan

[2] Natl Taiwan Normal Univ, Taipei, Taiwan

[3] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[4] Acad Sinica, Inst Atom & Mol Sci, Taipei, Taiwan

来源：

CHEMCATCHEM | 2010年 / 2卷 / 02期

关键词：

electrocatalysis; electrochemistry; fuel cells; nanoparticles; X-ray absorption spectroscopy; RAY-ABSORPTION SPECTROSCOPY; CORE-SHELL NANOPARTICLES; PT-RU NANOPARTICLES; FUEL-CELL CATALYSTS; BIMETALLIC NANOPARTICLES; CHEMICAL TRANSFORMATION; METAL NANOPARTICLES; STRUCTURAL-ANALYSIS; REVERSE MICELLES; PD;

D O I：

10.1002/cctc.200900051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A promising electrocatalyst based on the reduction of pt(2+) ions on the surface of hexagonally close-packed (hcp) Ru core nanoparticles has been prepared by a redox-transmetalation process. This simple synthetic process generates a Pt-on-Ru catalyst with a lower Pt content than commercially available Pt-Ru electrocatalysts and with a long-range ordered hcp structure, which can significantly reduce the Pt loading. X-Ray absorption spectroscopy of the Pt-on-Ru catalyst reveals pronounced electronic modifications when compared to the commercial Pt-Ru black catalyst. The Pt-on-Ru catalyst exhibits a higher mass-specific current than the Pt-Ru black catalyst in solution in 0.5 m H2SO4 with 10 vol.% CH3OH under the conditions of rotating disk experiments. Further optimization of this synthetic procedure may yield even more active electrocatalysts with a significant reduction in noble metal loadings.

引用

页码：159 / 166

页数：8

共 49 条

[31] Characterization and catalytic-hydrogenation behavior of SiO2-embedded nanoscopic Pd, Au, and Pd-Au alloy colloids [J].

Pârvulescu, VI ;

Pârvulescu, V ;

Eudruschat, U ;

Filoti, G ;

Wagner, FE ;

Kübel, C ;

Richards, R .

CHEMISTRY-A EUROPEAN JOURNAL, 2006, 12 (08) :2343-2357

[32]

Pecharsky V., 2008, Fundamentals of Powder Diffraction and Structural Characterization of Materials

[33] Characterization of differently synthesized Pt-Ru fuel cell catalysts by cyclic voltammetry, FTIR spectroscopy, and in single cells [J].

Roth, C ;

Martz, N ;

Hahn, F ;

Léger, JM ;

Lamy, C ;

Fuess, H .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (11) :E433-E439

[34] Formation of Pt-Ru nanoparticles in ethylene glycol solution: An in situ X-ray absorption spectroscopy study [J].

Sarma, Loka Subramanyam ;

Chen, Ching-Hsiang ;

Kumar, Sakkarapalayam Murugesan Senthil ;

Wang, Guo-Rung ;

Yen, Shih-Chieh ;

Liu, Din-Goa ;

Sheu, Hwo-Shuenn ;

Yu, Kuan-Li ;

Tang, Mau-Tsu ;

Lee, Jyh-Fu ;

Bock, Christina ;

Chen, Kuei-Hsien ;

Hwang, Bing-Joe .

LANGMUIR, 2007, 23 (10) :5802-5809

[35] Ultra-low platinum content fuel cell anode electrocatalyst with a long-term performance stability [J].

Sasaki, K ;

Wang, JX ;

Balasubramanian, M ;

McBreen, J ;

Uribe, F ;

Adzic, RR .

ELECTROCHIMICA ACTA, 2004, 49 (22-23) :3873-3877

[36] Surface strain versus substrate interaction in heteroepitaxial metal layers:: Pt on Ru(0001) -: art. no. 016101 [J].

Schlapka, A ;

Lischka, M ;

Gross, A ;

Käsberger, U ;

Jakob, P .

PHYSICAL REVIEW LETTERS, 2003, 91 (01) :016101/1-016101/4

[37] Titania-supported PdAu bimetallic catalysts prepared from dendrimer-encapsulated nanoparticle precursors [J].

Scott, RWJ ;

Sivadinarayana, C ;

Wilson, OM ;

Yan, Z ;

Goodman, DW ;

Crooks, RM .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (05) :1380-1381

[38] Direct synthesis of hydrogen peroxide from H2 and O2 using Al2O3 supported Au-Pd catalysts [J].

Solsona, Benjamin E. ;

Edwards, Jennifer K. ;

Landon, Philip ;

Carley, Albert F. ;

Herzing, Andrew ;

Kiely, Christopher J. ;

Hutchings, Graham J. .

CHEMISTRY OF MATERIALS, 2006, 18 (11) :2689-2695

[39]

Stellacci F, 2005, NAT MATER, V4, P113, DOI 10.1038/nmat1316

[40] THE UWXAFS ANALYSIS PACKAGE - PHILOSOPHY AND DETAILS [J].

STERN, EA ;

NEWVILLE, M ;

RAVEL, B ;

YACOBY, Y ;

HASKEL, D .

PHYSICA B-CONDENSED MATTER, 1995, 208 (1-4) :117-120

← 1 2 3 4 5 →