Molten NaCl‐Assisted Synthesis of Porous Fe‐N‐C Electrocatalysts with a High Density of Catalytically Accessible FeN4 Active Sites and Outstanding Oxygen Reduction Reaction Performance

Show simple item record

dc.contributor.author Wang, Qing
dc.contributor.author Yang, Yuqi
dc.contributor.author Sun, Fanfei
dc.contributor.author Chen, Guangbo
dc.contributor.author Wang, Jian
dc.contributor.author Peng, Lishan
dc.contributor.author Chen, Wan‐Ting
dc.contributor.author Shang, Lu
dc.contributor.author Zhao, Jiaqi
dc.contributor.author Sun‐Waterhouse, Dongxiao
dc.contributor.author Zhang, Tierui
dc.contributor.author Waterhouse, Geoffrey IN
dc.date.accessioned 2021-05-25T19:56:23Z
dc.date.available 2021-05-25T19:56:23Z
dc.date.issued 2021-3-25
dc.identifier.issn 1614-6832
dc.identifier.uri https://hdl.handle.net/2292/55151
dc.description.abstract Iron single atom catalysts (FeN ) hosted in the micropores of N-doped carbons offer excellent performance for the oxygen reduction reaction (ORR). Achieving a high density of FeN sites accessible for ORR has proved challenging to date. Herein, a simple surface NaCl-assisted method towards microporous N-doped carbon electrocatalysts with an abundance of catalytically accessible FeN sites is reported. Powder mixtures of microporous zeolitic imidazolate framework-8 and NaCl are first heated to 1000 °C in N , with the melting of NaCl above 800 °C creating a highly porous N-doped carbon product (NC-NaCl). Ferric (Fe ) ions are then adsorbed onto NC-NaCl, with a second pyrolysis stage at 900 °C in N yielding a porous Fe/NC-NaCl electrocatalyst (Brunauer–Emmett–Teller surface area, 1911 m g ) with an excellent dispersion and high density of accessible surface FeN sites (26.3 × 10 sites g ). The Fe/NC-NaCl electrocatalyst exhibits outstanding ORR performance with a high half-wave potential of 0.832 V (vs reversible hydrogen electrode) in 0.1 m HClO . When used as the ORR cathode catalyst in a 1.0 bar H -O fuel cell, Fe/NC-NaCl offers a high peak power density of 0.89 W cm , ranking it as one of the most active M-N-C materials reported to date. 4 4 4 2 2 4 4 2 2 3+ 2 −1 19 −1 −2
dc.language en
dc.publisher Wiley
dc.relation.ispartofseries Advanced Energy Materials
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.
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm
dc.subject 0303 Macromolecular and Materials Chemistry
dc.subject 0912 Materials Engineering
dc.subject 0915 Interdisciplinary Engineering
dc.title Molten NaCl‐Assisted Synthesis of Porous Fe‐N‐C Electrocatalysts with a High Density of Catalytically Accessible FeN4 Active Sites and Outstanding Oxygen Reduction Reaction Performance
dc.type Journal Article
dc.identifier.doi 10.1002/aenm.202100219
pubs.begin-page 2100219
dc.date.updated 2021-04-06T22:05:01Z
dc.rights.holder Copyright: The author en
pubs.publication-status Published online
dc.rights.accessrights http://purl.org/eprint/accessRights/RetrictedAccess en
pubs.subtype Journal Article
pubs.elements-id 845946
dc.identifier.eissn 1614-6840
pubs.online-publication-date 2021-3-25


Files in this item

Find Full text

This item appears in the following Collection(s)

Show simple item record

Share

Search ResearchSpace


Browse

Statistics