Enhanced activity and durability for the electroreduction of oxygen at a chemically ordered intermetallic PtFeCo catalyst

被引:51
作者
Arumugam, Balamurugan [1 ,2 ]
Kakade, Bhalchandra A. [1 ,3 ]
Tamaki, Takanori [1 ,2 ]
Arao, Masazumi [4 ]
Imai, Hideto [4 ]
Yamaguchi, Takeo [1 ,2 ]
机构
[1] Tokyo Inst Technol, Chem Resources Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan
[2] Kanagawa Acad Sci & Technol, Kawasaki, Kanagawa, Japan
[3] SRM Univ, SRM Res Inst, Madras 603203, Tamil Nadu, India
[4] NISSAN ARC Ltd, Device Funct Anal Dept, Yokosuka, Kanagawa 2370061, Japan
关键词
REDUCTION REACTION; ELECTROCATALYTIC ACTIVITY; FEPT NANOPARTICLES; FUEL-CELLS; ALLOYS; STABILITY; CU; STABILIZATION; NANOCRYSTALS; TEMPERATURE;
D O I
10.1039/c4ra04744c
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We have designed a chemically ordered face-centred tetragonal intermetallic PtFeCo (trimetallic) (fct-TM) alloy catalyst using a simple solid-state impregnation method for the oxygen-reduction reaction (ORR) in polymer electrolyte membrane fuel cells (PEMFCs). The fct-TM catalyst has demonstrated both enhanced activity and durability, unlike many Pt alloys. The chemical ordering of the fct-TM was verified by high-angle annular dark-field scanning transmission electron microscopy. The ORR activity of fct-TM was examined using the rotating-disk electrode (RDE) technique and the results are compared with those for a chemically disordered face-centred cubic (fcc), fcc-TM catalyst, and a commercial catalyst from Tanaka Kikinzoku Kogyo, TKK-PtC. The fct-TM displayed superior catalytic (mass) activity relative to disordered fcc-TM and TKK-PtC. The mass activity of fct-TM (0.505 A mgPt(-1)) is 2.5 times higher than that of TKK-PtC (0.23 A mgPt(-1)). The durability of these catalysts was evaluated over 5000 (5k) potential cycles in the lifetime regime. The fct-TM retained 80% of its initial mass activity and electrochemically active surface area (ECSA); however, fcc-TM and TKK-PtC maintained about 50% and 70% activity, respectively. The fct-TM also retained the chemically ordered structure after 5k durability cycles. This was confirmed using selected-area electron-diffraction (SAED) patterns. Furthermore, scanning transmission electron microscopy-energy dispersive X-ray spectroscopy (STEM-EDX) line scans of the fct-TM catalysts after 5k durability cycles revealed that Fe and Co were found similar to as before cycling, which signifies that the dissolution of Fe and Co was impeded by the fct-TM catalysts. The observed enhancement in durability might be due to the ordered arrangement of Pt and Fe/Co within the alloy.
引用
收藏
页码:27510 / 27517
页数:8
相关论文
共 33 条
[1]   Analytical TEM study of Pt particle deposition in the proton-exchange membrane of a membrane-electrode-assembly [J].
Akita, Tomoki ;
Taniguchi, Akira ;
Maekawa, Junko ;
Sirorna, Zyun ;
Tanaka, Koji ;
Kohyama, Masanori ;
Yasuda, Kazuaki .
JOURNAL OF POWER SOURCES, 2006, 159 (01) :461-467
[2]  
Alloyeau D, 2009, NAT MATER, V8, P940, DOI [10.1038/NMAT2574, 10.1038/nmat2574]
[3]   Magnetic anisotropy of L10 FePt and Fe1-xMnxPt -: art. no. 134411 [J].
Burkert, T ;
Eriksson, O ;
Simak, SI ;
Ruban, AV ;
Sanyal, B ;
Nordström, L ;
Wills, JM .
PHYSICAL REVIEW B, 2005, 71 (13)
[4]   Solvothermal Synthesis of Platinum Alloy Nanoparticles for Oxygen Reduction Electrocatalysis [J].
Carpenter, Michael K. ;
Moylan, Thomas E. ;
Kukreja, Ratandeep Singh ;
Atwan, Mohammed H. ;
Tessema, Misle M. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (20) :8535-8542
[5]   Understanding and Controlling Nanoporosity Formation for Improving the Stability of Bimetallic Fuel Cell Catalysts [J].
Gan, Lin ;
Heggen, Marc ;
O'Malley, Rachel ;
Theobald, Brian ;
Strasser, Peter .
NANO LETTERS, 2013, 13 (03) :1131-1138
[6]   Experimental Methods for Quantifying the Activity of Platinum Electrocatalysts for the Oxygen Reduction Reaction [J].
Garsany, Yannick ;
Baturina, Olga A. ;
Swider-Lyons, Karen E. ;
Kocha, Shyam S. .
ANALYTICAL CHEMISTRY, 2010, 82 (15) :6321-6328
[7]   Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCs [J].
Gasteiger, HA ;
Kocha, SS ;
Sompalli, B ;
Wagner, FT .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 56 (1-2) :9-35
[8]   Platinum-Monolayer Shell on AuNi0.5Fe Nanoparticle Core Electrocatalyst with High Activity and Stability for the Oxygen Reduction Reaction [J].
Gong, Kuanping ;
Su, Dong ;
Adzic, Radoslav R. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (41) :14364-14366
[9]  
Ji XL, 2010, NAT CHEM, V2, P286, DOI [10.1038/NCHEM.553, 10.1038/nchem.553]
[10]   Sinter-free phase conversion and scanning transmission electron microscopy of FePt nanoparticle monolayers [J].
Johnston-Peck, Aaron C. ;
Scarel, Giovanna ;
Wang, Junwei ;
Parsons, Gregory N. ;
Tracy, Joseph B. .
NANOSCALE, 2011, 3 (10) :4142-4149