dc.contributor.author |
Yang, Hui |
en |
dc.contributor.author |
Chen, Xing |
en |
dc.contributor.author |
Chen, Wan-Ting |
en |
dc.contributor.author |
Wang, Qing |
en |
dc.contributor.author |
Cuello, Nelly Cantillo |
en |
dc.contributor.author |
Nafady, Ayman |
en |
dc.contributor.author |
Al-Enizi, Abdullah M |
en |
dc.contributor.author |
Waterhouse, Geoffrey |
en |
dc.contributor.author |
Goenaga, Gabriel A |
en |
dc.contributor.author |
Zawodzinski, Thomas A |
en |
dc.contributor.author |
Kruger, Paul E |
en |
dc.contributor.author |
Clements, John E |
en |
dc.contributor.author |
Zhang, Jian |
en |
dc.contributor.author |
Tian, He |
en |
dc.contributor.author |
Telfer, Shane G |
en |
dc.contributor.author |
Ma, Shengqian |
en |
dc.date.accessioned |
2019-11-05T01:40:20Z |
en |
dc.date.issued |
2019-07 |
en |
dc.identifier.issn |
1936-0851 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/48843 |
en |
dc.description.abstract |
Atomically dispersed metal catalysts anchored on nitrogen-doped (N-doped) carbons demand attention due to their superior catalytic activity relative to that of metal nanoparticle catalysts in energy storage and conversion processes. Herein, we introduce a simple and versatile strategy for the synthesis of hollow N-doped carbon capsules that contain one or more atomically dispersed metals (denoted as H-M-Nx-C and H-Mmix-Nx-C, respectively, where M = Fe, Co, or Ni). This method utilizes the pyrolysis of nanostructured core-shell precursors produced by coating a zeolitic imidazolate framework core with a metal-tannic acid (M-TA) coordination polymer shell (containing up to three different metal cations). Pyrolysis of these core-shell precursors affords hollow N-doped carbon capsules containing monometal sites (e.g., Fe-Nx, CoNx, or Ni-Nx) or multimetal sites (Fe/Co-Nx, Fe/Ni-Nx, Co/Ni-Nx, or Fe/Co/Ni-Nx). This inventory allowed exploration of the relationship between catalyst composition and electrochemical activity for the oxygen reduction reaction (ORR) in acidic solution. H-Fe-Nx-C, H-Co-Nx-C, H-FeCo-Nx-C, H-FeNi-Nx-C, and H-FeCoNi-Nx-C were particularly efficient ORR catalysts in acidic solution. Furthermore, the H-Fe-Nx-C catalyst exhibited outstanding initial performance when applied as a cathode material in a proton exchange membrane fuel cell. The synthetic methodology introduced here thus provides a convenient route for developing next-generation catalysts based on earth-abundant components. |
en |
dc.format.medium |
Print-Electronic |
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dc.language |
eng |
en |
dc.relation.ispartofseries |
ACS nano |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.title |
Tunable Synthesis of Hollow Metal-Nitrogen-Carbon Capsules for Efficient Oxygen Reduction Catalysis in Proton Exchange Membrane Fuel Cells. |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1021/acsnano.9b02930 |
en |
pubs.issue |
7 |
en |
pubs.begin-page |
8087 |
en |
pubs.volume |
13 |
en |
dc.rights.holder |
Copyright: The author |
en |
pubs.end-page |
8098 |
en |
pubs.publication-status |
Published |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Journal Article |
en |
pubs.elements-id |
776323 |
en |
pubs.org-id |
Science |
en |
pubs.org-id |
Chemistry |
en |
dc.identifier.eissn |
1936-086X |
en |
pubs.record-created-at-source-date |
2019-06-28 |
en |
pubs.dimensions-id |
31244037 |
en |