Catalytic performance and mechanism of N-CoTi@CoTiO3 catalysts for oxygen reduction reaction

被引:33
作者
An, Li [1 ]
Yan, Huijun [1 ]
Chen, Xin [1 ]
Li, Biao [1 ]
Xia, Zhonghong [1 ]
Xia, Dingguo [1 ]
机构
[1] Peking Univ, Coll Engn, Key Lab Theory & Technol Adv Batteries Mat, Beijing 100871, Peoples R China
基金
中国国家自然科学基金;
关键词
N-CoTi@CoTiO3; Oxygen reduction reaction; Electrocatalyst; Surface polarization; NITROGEN-DOPED CARBON; METAL-FREE ELECTROCATALYSTS; FACILE SYNTHESIS; PLATINUM; NANOPARTICLES; GRAPHENE; POLYANILINE; NANOSPHERES; STABILITY; AUCU3;
D O I
10.1016/j.nanoen.2015.12.002
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
Alternative non-precious metal catalysts with comparable oxygen reduction reaction activity and durability to Pt-based catalysts are highly desirable for the development of fuel cell. Herein, we report a novel and efficient non-precious electrocatalyst N-CoTi@CoTiO3/C featuring an unusual composite oxide layer on the surface of CoTi alloy nanoparticles, which was investigated using probe-corrected scanning transmission electron microscopy, electron energy-loss spectroscopy, and density functional theory calculations. The N-CoTi@CoTiO3/C catalyst shows superior catalytic performance for oxygen reduction reactions (ORR) in alkaline solutions, with comparable onset potential, half-wave potential to commercial Pt/C and specific activity 1.5 times as high as commercial Pt/C at 0.70 V. Theoretical calculations demonstrate that the surface oxide layer polarization effect caused by the intermetallic CoTi core plays a key role in the high ORR activity of N-CoTi@CoTiO3/C. The enhancement of ORR activity and durability of catalyst by the surface polarization provides a versatile strategy for tuning the catalytic performance of non-noble electrocatalysts. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:134 / 143
页数:10
相关论文
共 54 条
[1]  
Aguia A., 2001, J SYNCHROTRON RAD, V907
[2]   Synthesis, characterization, and self-assembly of pencil-shaped CoO nanorods [J].
An, Kwangjin ;
Lee, Nohyun ;
Park, Jongnam ;
Kim, Sung Chul ;
Hwang, Yosun ;
Park, Je-Geun ;
Kim, Jae-Young ;
Park, Jae-Hoon ;
Han, Myung Joon ;
Yu, Jaejun ;
Hyeon, Taeghwan .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (30) :9753-9760
[3]   A novel CoN electrocatalyst with high activity and stability toward oxygen reduction reaction [J].
An, Li ;
Huang, Weifeng ;
Zhang, Nanlin ;
Chen, Xin ;
Xia, Dingguo .
JOURNAL OF MATERIALS CHEMISTRY A, 2014, 2 (01) :62-65
[4]  
[Anonymous], 2013, MEDIAT INFLAMM
[5]   Molten Salt Assisted Self Assembly (MASA): Synthesis of Mesoporous Metal Titanate (CoTiO3, MnTiO3, and Li4Ti5O12) Thin Films and Monoliths [J].
Avci, Civan ;
Aydin, Aykut ;
Tuna, Zeynep ;
Yavuz, Zelal ;
Yamauchi, Yusuke ;
Suzuki, Norihiro ;
Dag, Omer .
CHEMISTRY OF MATERIALS, 2014, 26 (20) :6050-6057
[6]   Controllably Interfacing with Metal: A Strategy for Enhancing CO Oxidation on Oxide Catalysts by Surface Polarization [J].
Bai, Yu ;
Zhang, Wenhua ;
Zhang, Zhenhua ;
Zhou, Jie ;
Wang, Xijun ;
Wang, Chengming ;
Huang, Weixin ;
Jiang, Jun ;
Xiong, Yujie .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2014, 136 (42) :14650-14653
[7]   Cobalt Molybdenum Oxynitrides: Synthesis, Structural Characterization, and Catalytic Activity for the Oxygen Reduction Reaction [J].
Cao, Bingfei ;
Veith, Gabriel M. ;
Diaz, Rosa E. ;
Liu, Jue ;
Stach, Eric A. ;
Adzic, Radoslav R. ;
Khalifah, Peter G. .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2013, 52 (41) :10753-10757
[8]   Unraveling Oxygen Reduction Reaction Mechanisms on Carbon-Supported Fe-Phthalocyanine and Co-Phthalocyanine Catalysts in Alkaline Solutions [J].
Chen, Rongrong ;
Li, Haixia ;
Chu, Deryn ;
Wang, Guofeng .
JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (48) :20689-20697
[9]   A review on non-precious metal electrocatalysts for PEM fuel cells [J].
Chen, Zhongwei ;
Higgins, Drew ;
Yu, Aiping ;
Zhang, Lei ;
Zhang, Jiujun .
ENERGY & ENVIRONMENTAL SCIENCE, 2011, 4 (09) :3167-3192
[10]   Rapid room-temperature synthesis of nanocrystalline spinels as oxygen reduction and evolution electrocatalysts [J].
Cheng, Fangyi ;
Shen, Jian ;
Peng, Bo ;
Pan, Yuede ;
Tao, Zhanliang ;
Chen, Jun .
NATURE CHEMISTRY, 2011, 3 (01) :79-84