Preparation and characterization of Ti0.7Sn0.3O2 as catalyst support for oxygen reduction reaction

doi:10.1016/S2095-4956(14)60155-8

能源化学(英文) ›› 2014, Vol. 23 ›› Issue (3): 331-337.DOI: 10.1016/S2095-4956(14)60155-8

Preparation and characterization of Ti_0.7Sn_0.3O₂ as catalyst support for oxygen reduction reaction

Yuan Gao^a,b, Ming Hou^a, Zhigang Shao^a, Changkun Zhang^a,b, Xiaoping Qin^a, Baolian Yi^a

a. Fuel Cell System and Engineering Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b. Graduate School of Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2013-11-29 修回日期:2014-03-03 出版日期:2014-05-24 发布日期:2014-05-25
通讯作者: Ming Hou, Zhigang Shao
基金资助:
This work was supported by the National High Technology Research and Development Program of China (863 Program, Grant No. 2013AA110201), the National Basic Research Program of China (973 Program, Grant No. 2012CB215500), and the National Natural Science Foundations of China (Grant No. 21203191).

Preparation and characterization of Ti_0.7Sn_0.3O₂ as catalyst support for oxygen reduction reaction

Yuan Gao^a,b, Ming Hou^a, Zhigang Shao^a, Changkun Zhang^a,b, Xiaoping Qin^a, Baolian Yi^a

a. Fuel Cell System and Engineering Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b. Graduate School of Chinese Academy of Sciences, Beijing 100049, China

Received:2013-11-29 Revised:2014-03-03 Online:2014-05-24 Published:2014-05-25
Supported by:
This work was supported by the National High Technology Research and Development Program of China (863 Program, Grant No. 2013AA110201), the National Basic Research Program of China (973 Program, Grant No. 2012CB215500), and the National Natural Science Foundations of China (Grant No. 21203191).

摘要/Abstract

摘要： Sn-doped TiO₂ nanoparticles with high surface area of 125.7 m²·g^-1 are synthesized via a simple one-step hydrothermal method and explored as the cathode catalyst support for proton exchange membrane fuel cells. The synthesized support materials are studied by X-ray diffraction analysis, energy dispersive X-ray spectroscopy and transmission electron microscopy. It is found that the conductivity has been greatly improved by the addition of 30 mol% Sn and Pt nanoparticles are well dispersed on Ti_0.7Sn_0.3O₂ support with an average size of 2.44 nm. Electrochemical studies show that the Ti_0.7Sn_0.3O₂ nanoparticles have excellent electrochemical stability under a high potential compared to Vulcan XC-72. The as-synthesized Pt/Ti_0.7Sn_0.3O₂ exhibits high and stable electrocatalytic activity for the oxygen reduction reaction. The Pt/Ti_0.7Sn_0.3O₂ catalyst reserves most of its electrochemically active surface area (ECA), and its half wave potential difference is 11 mV, which is lower than that of Pt/XC-72 (36 mV) under 10 h potential hold at 1.4 V vs. NHE. In addition, the ECA degradation of Pt/Ti_0.7Sn_0.3O₂ is 1.9 times lower than commercial Pt/XC-72 under 500 potential cycles between 0.6 V and 1.2 V vs. NHE. Therefore, the as synthesized Pt/Ti_0.7Sn_0.3O₂ can be considered as a promising alternative cathode catalyst for proton exchange membrane fuel cells.

关键词: tin, titanium oxide, support, durability, proton exchange membrane fuel cells

Abstract: Sn-doped TiO₂ nanoparticles with high surface area of 125.7 m²·g^-1 are synthesized via a simple one-step hydrothermal method and explored as the cathode catalyst support for proton exchange membrane fuel cells. The synthesized support materials are studied by X-ray diffraction analysis, energy dispersive X-ray spectroscopy and transmission electron microscopy. It is found that the conductivity has been greatly improved by the addition of 30 mol% Sn and Pt nanoparticles are well dispersed on Ti_0.7Sn_0.3O₂ support with an average size of 2.44 nm. Electrochemical studies show that the Ti_0.7Sn_0.3O₂ nanoparticles have excellent electrochemical stability under a high potential compared to Vulcan XC-72. The as-synthesized Pt/Ti_0.7Sn_0.3O₂ exhibits high and stable electrocatalytic activity for the oxygen reduction reaction. The Pt/Ti_0.7Sn_0.3O₂ catalyst reserves most of its electrochemically active surface area (ECA), and its half wave potential difference is 11 mV, which is lower than that of Pt/XC-72 (36 mV) under 10 h potential hold at 1.4 V vs. NHE. In addition, the ECA degradation of Pt/Ti_0.7Sn_0.3O₂ is 1.9 times lower than commercial Pt/XC-72 under 500 potential cycles between 0.6 V and 1.2 V vs. NHE. Therefore, the as synthesized Pt/Ti_0.7Sn_0.3O₂ can be considered as a promising alternative cathode catalyst for proton exchange membrane fuel cells.

Key words: tin, titanium oxide, support, durability, proton exchange membrane fuel cells

Yuan Gao, Ming Hou, Zhigang Shao, Changkun Zhang, Xiaoping Qin, Baolian Yi. Preparation and characterization of Ti_0.7Sn_0.3O₂ as catalyst support for oxygen reduction reaction[J]. 能源化学(英文), 2014, 23(3): 331-337.

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Preparation and characterization of Ti_0.7Sn_0.3O₂ as catalyst support for oxygen reduction reaction

Preparation and characterization of Ti_0.7Sn_0.3O₂ as catalyst support for oxygen reduction reaction

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