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In situ coupled amorphous cobalt nitride with nitrogen-doped graphene aerogel as a trifunctional electrocatalyst towards Zn-air battery deriven full water splitting
Harbin Inst Technol, Sch Chem & Chem Engn, 92 West Da Zhi St, Harbin 150001, Heilongjiang, Peoples R China.;Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China.;Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Shenzhen 518055, Peoples R China..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Applied Physical Chemistry.
Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China.;Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Shenzhen 518055, Peoples R China..
Harbin Inst Technol, Sch Chem & Chem Engn, 92 West Da Zhi St, Harbin 150001, Heilongjiang, Peoples R China.;Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117574, Singapore..
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2019 (English)In: Applied Catalysis B: Environmental, ISSN 0926-3373, E-ISSN 1873-3883, Vol. 259, article id UNSP 118100Article in journal (Refereed) Published
Abstract [en]

Herein, we report a new type of efficient trifunctional electrocatalyst by in situ coupling amorphous cobalt nitride (CoNx) nanoparticles within three-dimensional (3D) nitrogen-doped graphene aerogel (NGA). The CoNx/NGA nanohybrid with hierarchical porous strucuture guarantees the superior activities toward ORR, OER and HER, due to abundant dual active CoNx. and NxC sites. Impressively, it also exhibits a long lifetime and exceptionally high electrochemical performances as a cathode and an anode in a two-electrode overall water splitting electrolyzer, and also as an air-cathode in a rechargeable Zn-air battery. In addition, the CoNx/NGA-based water splitting electrolyzer and two Zn-air batteries can be integrated together to effectively self-drive electrochemical water splitting device with high gas evolution rates of 186 and 372 mu mol h(-1) for O-2 and H-2, respectively. This work paves a way for designing advanced non-noble multifunctional catalysts, aiming for the real application of energy storage and conversion devices.

Place, publisher, year, edition, pages
ELSEVIER , 2019. Vol. 259, article id UNSP 118100
Keywords [en]
Amorphous CoNx, Nitrogen-doped graphene aerogel, Water electrolysis, Zinc-air battery, Electrochemistry
National Category
Chemical Sciences Physical Chemistry
Research subject
Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-262752DOI: 10.1016/j.apcatb.2019.118100ISI: 000488308800070Scopus ID: 2-s2.0-85070890725OAI: oai:DiVA.org:kth-262752DiVA, id: diva2:1365017
Note

QC 20191023

Available from: 2019-10-23 Created: 2019-10-23 Last updated: 2019-12-03Bibliographically approved

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Li, Ge

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