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

Teng Chen; Yida Xu; Siqi Guo; Dali Wei; Luming Peng; Xuefeng Guo; Nianhua Xue; Yan Zhu; Zhaoxu Chen; Bin Zhao; Weiping Ding

iScience (Jan 2019)

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

Teng Chen,
Yida Xu,
Siqi Guo,
Dali Wei,
Luming Peng,
Xuefeng Guo,
Nianhua Xue,
Yan Zhu,
Zhaoxu Chen,
Bin Zhao,
Weiping Ding

Affiliations

Teng Chen: Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
Yida Xu: Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
Siqi Guo: Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
Dali Wei: Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
Luming Peng: Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
Xuefeng Guo: Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
Nianhua Xue: Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
Yan Zhu: Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
Zhaoxu Chen: Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
Bin Zhao: Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China; Corresponding author
Weiping Ding: Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China; Corresponding author

Journal volume & issue: Vol. 11
pp. 388 – 397

Abstract

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Summary: 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 ∼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/mgPt at 0.90 V (well above the US Department of Energy's 2020 target of 0.44 A/mgPt at 0.90 V) after 50,000 cyclic voltammetry cycles under acidic conditions is still better than that of the fresh commercial catalyst. : Catalysis; Electrochemical Energy Conversion; Energy Materials Subject Areas: Catalysis, Electrochemical Energy Conversion, Energy Materials

Published in iScience

ISSN: 2589-0042 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Science
Website: http://www.cell.com/iscience/home

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