title: Highly stable ternary tin-palladium-platinum catalysts supported on hydrogenated TiO2 nanotube arrays for fuel cells.
abstract: Herein the Pt nanocrystals were synthesized by a high-pressure methanol reduction method onto the hydrogenated TiO2 nanotube arrays pre-treated by Sn/Pd. Then Sn/Pd/Pt ternary catalysts were fabricated by hydrogen treatment. The composite catalysts with a diameter of about 18 nm were located uniformly at the inner nanotubes. The novel catalyst combined with hydrogenated TiO2 nanotube arrays exhibits excellent electro-catalytic activity and high durability. The electrochemical performance of the catalysts after 18,000 potential cycles between 0 and 1.2 V vs. RHE could reach the maximum, and the electrochemical surface area of the catalyst at 18,000 cycles is about 136 m(2) g(-1)Pt+Pd, which is 1.3 folds than the commercial JM Pt/C (104 m(2) g(-1)Pt). Furthermore, there is little decrease in the electrochemical surface area for the catalyst after additional 7300 potential cycles (total 24,300 cycles). In a full cell testing, the fabricated novel electrode with extra-low Pt loading (0.043 mg cm(-2)) generated power as 1.21 kW g(-1)Pt when it is used as the cathode in a fuel cell.
authors.affiliation: Fuel Cell System and Engineering Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, PR China.
authors.forename: Changkun
authors.initials: C
authors.lastname: Zhang
authors.forename: Hongmei
authors.initials: H
authors.lastname: Yu
authors.forename: Yongkun
authors.initials: Y
authors.lastname: Li
authors.forename: Li
authors.initials: L
authors.lastname: Fu
authors.forename: Yuan
authors.initials: Y
authors.lastname: Gao
authors.forename: Wei
authors.initials: W
authors.lastname: Song
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Shao
authors.forename: Baolian
authors.initials: B
authors.lastname: Yi