Composition-Tunable PtCu Alloy Nanowires and Electrocatalytic Synergy for Methanol Oxidation Reaction

被引：112

作者：

Liao, Yuan ^{[1
]}

Yu, Gang ^{[1
]}

Zhang, Yu ^{[1
]}

Guo, Tingting ^{[1
]}

Chang, Fangfang ^{[1
,2
]}

Zhong, Chuan-Jian ^{[2
]}

机构：

[1] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China

[2] SUNY Binghamton, Dept Chem, Binghamton, NY 13902 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2016年 / 120卷 / 19期

基金：

中国国家自然科学基金;

关键词：

OXYGEN REDUCTION REACTION; CORE-SHELL NANOPARTICLES; ONE-POT SYNTHESIS; FUEL-CELLS; CARBON-MONOXIDE; CATALYSTS; CU; NI; NANOCRYSTALS; ULTRATHIN;

D O I：

10.1021/acs.jpcc.6b02630

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：

The ability to impart Pt-based catalysts with high catalytic activity and low cost is essential for advancing fuel cell technologies. This report describes the synthesis of composition-tunable PtCu alloy nanowires (NWs) of ultrathin diameters (ca. 1 nm) to create synergistic catalytic sites along the nanowire surfaces. The bimetallic NWs exhibit composition-tunable fcc-type alloy phase. The electrocatalytic properties of the PtCu alloy NWs for methanol oxidation reaction were shown to display an intriguing composition-dependent catalytic synergy. The maximum mass activity for Pt32Cu68 NWs was about 2 times higher than that of Pt NWs. It also exhibited the highest stability and tolerance to CO poisoning. The enhanced activity and stability were attributed to a bifunctional synergy whereby the alloyed Cu atoms in the Pt lattice provides CO-maneuvering sites for reducing the poisoning effect of CO intermediate species on the active surface sites of the NWs.

引用

页码：10476 / 10484

页数：9

共 51 条

[1] Formate, an active intermediate for direct oxidation of methanol on Pt electrode [J].

Chen, YX ;

Miki, A ;

Ye, S ;

Sakai, H ;

Osawa, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (13) :3680-3681

[2] Carbon Monoxide-Assisted Synthesis of Ultrathin PtCu3 Alloy Wavy Nanowires and Their Enhanced Electrocatalysis [J].

Dai, Lei ;

Mo, Shiguang ;

Qin, Qing ;

Zhao, Xiaojing ;

Zheng, Nanfeng .

SMALL, 2016, 12 (12) :1572-1577

[3] Electrocatalyst approaches and challenges for automotive fuel cells [J].

Debe, Mark K. .

NATURE, 2012, 486 (7401) :43-51

[4] VEGARD LAW [J].

DENTON, AR ;

ASHCROFT, NW .

PHYSICAL REVIEW A, 1991, 43 (06) :3161-3164

[5] Structure Sensitivity of Methanol Electrooxidation on Transition Metals [J].

Ferrin, Peter ;

Mavrikakis, Manos .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (40) :14381-14389

[6] Charge ordering, commensurability, and metallicity in the phase diagram of the layered NaxCoO2 -: art. no. 247001 [J].

Foo, ML ;

Wang, YY ;

Watauchi, S ;

Zandbergen, HW ;

He, T ;

Cava, RJ ;

Ong, NP .

PHYSICAL REVIEW LETTERS, 2004, 92 (24) :247001-1

[7] Pt-Ru model catalysts for anodic methanol oxidation:: Influence of structure and composition on the reactivity [J].

Hoster, H ;

Iwasita, T ;

Baumgärtner, H ;

Vielstich, W .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2001, 3 (03) :337-346

[8] Promoting Effect of Ni in PtNi Bimetallic Electrocatalysts for the Methanol Oxidation Reaction in Alkaline Media: Experimental and Density Functional Theory Studies [J].

Jiang, Qian ;

Jiang, Luhua ;

Hou, Hongying ;

Qi, Jing ;

Wang, Suli ;

Sun, Gongquan .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (46) :19714-19722

[9] In situ FTIRS study of the electrocatalytic oxidation of carbon monoxide and methanol at platinum-ruthenium bulk alloy electrodes [J].

Kabbabi, A ;

Faure, R ;

Durand, R ;

Beden, B ;

Hahn, F ;

Leger, JM ;

Lamy, C .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1998, 444 (01) :41-53

[10] Enhanced Electrocatalytic Performance of Processed, Ultrathin, Supported Pd-Pt Core-Shell Nanowire Catalysts for the Oxygen Reduction Reaction [J].

Koenigsmann, Christopher ;

Santulli, Alexander C. ;

Gong, Kuanping ;

Vukmirovic, Miomir B. ;

Zhou, Wei-ping ;

Sutter, Eli ;

Wong, Stanislaus S. ;

Adzic, Radoslav R. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2011, 133 (25) :9783-9795

← 1 2 3 4 5 6 →