Carbon nanotube-encapsulated cobalt for oxygen reduction: integration of space confinement and N-doping.

Qichen Wang; Ke Ye; Liang Xu; Wei Hu; Yongpeng Lei; Yi Zhang; Yin Chen; Kechao Zhou; Jun Jiang; Jean-Marie Basset; Dingsheng Wang; Yadong Li

doi:10.1039/c9cc08439h

Carbon nanotube-encapsulated cobalt for oxygen reduction: integration of space confinement and N-doping.

Qichen Wang, Ke Ye, Liang Xu, Wei Hu, Yongpeng Lei, Yi Zhang, Yin Chen, Kechao Zhou, Jun Jiang, Jean-Marie Basset, Dingsheng Wang, Yadong Li

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Abstract

We report carbon nanotube-encapsulated cobalt as an efficient oxygen reduction electrocatalyst (onset potential of 0.94 V and half-potential of 0.84 V). Calculation results firstly reveal that Co protected by graphitic-N-doped carbon holds more negative charge (-1.22 eV) and has an energy barrier (0.56 eV) lower than that of pyridinic-N-doped carbon (-1.11 eV; 0.78 eV), which is responsible for the ORR activity. The corresponding Zn-air batteries deliver an excellent gravimetric energy density of 837 W h kg-1.

Original language	English (US)
Pages (from-to)	14801-14804
Number of pages	4
Journal	Chemical communications (Cambridge, England)
Volume	55
Issue number	98
DOIs	https://doi.org/10.1039/c9cc08439h
State	Published - 2019

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KAUST Repository Item: Exported on 2020-10-01

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title = "Carbon nanotube-encapsulated cobalt for oxygen reduction: integration of space confinement and N-doping.",

abstract = "We report carbon nanotube-encapsulated cobalt as an efficient oxygen reduction electrocatalyst (onset potential of 0.94 V and half-potential of 0.84 V). Calculation results firstly reveal that Co protected by graphitic-N-doped carbon holds more negative charge (-1.22 eV) and has an energy barrier (0.56 eV) lower than that of pyridinic-N-doped carbon (-1.11 eV; 0.78 eV), which is responsible for the ORR activity. The corresponding Zn-air batteries deliver an excellent gravimetric energy density of 837 W h kg-1.",

author = "Qichen Wang and Ke Ye and Liang Xu and Wei Hu and Yongpeng Lei and Yi Zhang and Yin Chen and Kechao Zhou and Jun Jiang and Jean-Marie Basset and Dingsheng Wang and Yadong Li",

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doi = "10.1039/c9cc08439h",

language = "English (US)",

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pages = "14801--14804",

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TY - JOUR

T1 - Carbon nanotube-encapsulated cobalt for oxygen reduction: integration of space confinement and N-doping.

AU - Wang, Qichen

AU - Ye, Ke

AU - Xu, Liang

AU - Hu, Wei

AU - Lei, Yongpeng

AU - Zhang, Yi

AU - Chen, Yin

AU - Zhou, Kechao

AU - Jiang, Jun

AU - Basset, Jean-Marie

AU - Wang, Dingsheng

AU - Li, Yadong

N1 - KAUST Repository Item: Exported on 2020-10-01

PY - 2019

Y1 - 2019

N2 - We report carbon nanotube-encapsulated cobalt as an efficient oxygen reduction electrocatalyst (onset potential of 0.94 V and half-potential of 0.84 V). Calculation results firstly reveal that Co protected by graphitic-N-doped carbon holds more negative charge (-1.22 eV) and has an energy barrier (0.56 eV) lower than that of pyridinic-N-doped carbon (-1.11 eV; 0.78 eV), which is responsible for the ORR activity. The corresponding Zn-air batteries deliver an excellent gravimetric energy density of 837 W h kg-1.

AB - We report carbon nanotube-encapsulated cobalt as an efficient oxygen reduction electrocatalyst (onset potential of 0.94 V and half-potential of 0.84 V). Calculation results firstly reveal that Co protected by graphitic-N-doped carbon holds more negative charge (-1.22 eV) and has an energy barrier (0.56 eV) lower than that of pyridinic-N-doped carbon (-1.11 eV; 0.78 eV), which is responsible for the ORR activity. The corresponding Zn-air batteries deliver an excellent gravimetric energy density of 837 W h kg-1.

UR - http://hdl.handle.net/10754/660464

UR - http://xlink.rsc.org/?DOI=C9CC08439H

UR - http://www.scopus.com/inward/record.url?scp=85076125152&partnerID=8YFLogxK

U2 - 10.1039/c9cc08439h

DO - 10.1039/c9cc08439h

M3 - Article

C2 - 31761910

SN - 1359-7345

VL - 55

SP - 14801

EP - 14804

JO - Chemical communications (Cambridge, England)

JF - Chemical communications (Cambridge, England)

IS - 98

ER -

Carbon nanotube-encapsulated cobalt for oxygen reduction: integration of space confinement and N-doping.

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