Ternary Heterostructural Pt/CNx/Ni as a Supercatalyst for Oxygen Reduction

被引：40

作者：

Chen, Teng ^{[1
]}

Xu, Yida ^{[1
]}

Guo, Siqi ^{[1
]}

Wei, Dali ^{[1
]}

Peng, Luming ^{[1
]}

Guo, Xuefeng ^{[1
]}

Xue, Nianhua ^{[1
]}

Zhu, Yan ^{[1
]}

Chen, Zhaoxu ^{[1
]}

Zhao, Bin ^{[1
]}

Ding, Weiping ^{[1
]}

机构：

[1] Nanjing Univ, Sch Chem & Chem Engn, Key Lab Mesoscop Chem, Nanjing 210093, Jiangsu, Peoples R China

来源：

ISCIENCE | 2019年 / 11卷

基金：

美国国家科学基金会;

关键词：

ALLOY ELECTROCATALYSTS; PARTICLE-SIZE; FUEL-CELLS; PT-ALLOY; CATALYSIS; PLATINUM; NANOPARTICLES; HYDROGENATION; ENHANCEMENT; SEGREGATION;

D O I：

10.1016/j.isci.2018.12.029

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We report here a supercatalyst for oxygen reduction of Pt/CNx/Ni in a unique ternary heterostructure, in which the Pt and the underlying Ni nanoparticles are separated by two to three layers of nitrogen-doped carbon (CNx), which mediates the transfer of electrons from the inner Ni to the outer Pt and protects the Ni against corrosion at the same time. The well-engineered low-Pt catalyst shows similar to 780% enhanced specific mass activity or 490% enhanced specific surface activity compared with a commercial Pt/C catalyst toward oxygen reduction. More importantly, the exceptionally strong tune on the Pt by the unique structure makes the catalyst superbly stable, and its mass activity of 0.72 A/mg(Pt) at 0.90 V (well above the US Department of Energy's 2020 target of 0.44 A/mg(Pt) at 0.90 V) after 50,000 cyclic voltammetry cycles under acidic conditions is still better than that of the fresh commercial catalyst.

引用

页码：388 / +

页数：20

共 54 条

[1] Optimizing the electrode position in sacrificial anode cathodic protection systems using boundary element method [J].

Abootalebi, O. ;

Kermanpur, A. ;

Shishesaz, M. R. ;

Golozar, M. A. .

CORROSION SCIENCE, 2010, 52 (03) :678-687

[2] A review of the stability and durability of non-precious metal catalysts for the oxygen reduction reaction in proton exchange membrane fuel cells [J].

Banham, Dustin ;

Ye, Siyu ;

Pei, Katie ;

Ozaki, Jun-ichi ;

Kishimoto, Takeaki ;

Imashiro, Yasuo .

JOURNAL OF POWER SOURCES, 2015, 285 :334-348

[3] Highly Crystalline Multimetallic Nanoframes with Three-Dimensional Electrocatalytic Surfaces [J].

Chen, Chen ;

Kang, Yijin ;

Huo, Ziyang ;

Zhu, Zhongwei ;

Huang, Wenyu ;

Xin, Huolin L. ;

Snyder, Joshua D. ;

Li, Dongguo ;

Herron, Jeffrey A. ;

Mavrikakis, Manos ;

Chi, Miaofang ;

More, Karren L. ;

Li, Yadong ;

Markovic, Nenad M. ;

Somorjai, Gabor A. ;

Yang, Peidong ;

Stamenkovic, Vojislav R. .

SCIENCE, 2014, 343 (6177) :1339-1343

[4] Nitrogen-Doped Carbon Activated in Situ by Embedded Nickel through the Mott-Schottky Effect for the Oxygen Reduction Reaction [J].

Chen, Teng ;

Guo, Siqi ;

Yang, Jie ;

Xu, Yida ;

Sun, Jie ;

Wei, Dali ;

Chen, Zhaoxu ;

Zhao, Bin ;

Ding, Weiping .

CHEMPHYSCHEM, 2017, 18 (23) :3454-3461

[5] Supportless Pt and PtPd nanotubes as electrocatalysts for oxygen-reduction reactions [J].

Chen, Zhongwei ;

Waje, Mahesh ;

Li, Wenzhen ;

Yan, Yushan .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2007, 46 (22) :4060-4063

[6] Surface faceting and elemental diffusion behaviour at atomic scale for alloy nanoparticles during in situ annealing [J].

Chi, Miaofang ;

Wang, Chao ;

Lei, Yinkai ;

Wang, Guofeng ;

Li, Dongguo ;

More, Karren L. ;

Lupini, Andrew ;

Allard, Lawrence F. ;

Markovic, Nenad M. ;

Stamenkovic, Vojislav R. .

NATURE COMMUNICATIONS, 2015, 6

[7] Vertically aligned large-diameter double-walled carbon nanotube arrays having ultralow density [J].

Ci, Lijie ;

Vajtai, Robert ;

Ajayan, P. M. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (26) :9077-9080

[8]

Cui CH, 2013, NAT MATER, V12, P765, DOI [10.1038/NMAT3668, 10.1038/nmat3668]

[9] Octahedral PtNi Nanoparticle Catalysts: Exceptional Oxygen Reduction Activity by Tuning the Alloy Particle Surface Composition [J].

Cui, Chunhua ;

Gan, Lin ;

Li, Hui-Hui ;

Yu, Shu-Hong ;

Heggen, Marc ;

Strasser, Peter .

NANO LETTERS, 2012, 12 (11) :5885-5889

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

Debe, Mark K. .

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

← 1 2 3 4 5 6 →