Three-dimensional smart catalyst electrode for oxygen evolution reaction

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dc.contributor.authorChen, S.
dc.contributor.authorDuan, J.
dc.contributor.authorBian, P.
dc.contributor.authorTang, Y.
dc.contributor.authorZheng, R.
dc.contributor.authorQiao, S.
dc.date.issued2015
dc.description.abstractA multifunctional catalyst electrode mimicking external stimuli–responsive property has been prepared by the in situ growth of nitrogen (N)-doped NiFe double layered hydroxide (N–NiFe LDH) nanolayers on a 3D nickel foam substrate framework. The electrode demonstrates superior performance toward catalyzing oxygen evolution reaction (OER), affording a low overpotential of 0.23 V at the current density of 10 mA cm −2 , high Faradaic efficiency of ≈98%, and stable operation for >60 h. Meanwhile, the electrode can dynamically change its color from gray silver to dark black with the OER happening, and the coloration/bleaching processes persist for at least 5000 cycles, rendering it a useful tool to monitor the catalytic process. Mechanism study reveals that the excellent structural properties of electrode such as 3D conductive framework, ultra thickness of N–NiFe LDH nanolayer (≈0.8 nm), and high N-doping content (≈17.8%) make significant contribution to achieving enhanced catalytic performance, while N–NiFe LDH nanolayer on electrode is the main contributor to the stimuli-responsive property with the reversible extraction/insertion of electrons from/into N–NiFe LDH leading to the coloration/bleaching processes. Potential application of this electrode has been further demonstrated by integrating it into a Zn–air battery device to identify the charging process during electrochemical cycling.
dc.description.statementofresponsibilitySheng Chen, Jingjing Duan, Pengju Bian, Youhong Tang, Rongkun Zheng, and Shi-Zhang Qiao
dc.identifier.citationAdvanced Energy Materials, 2015; 5(18):1-7
dc.identifier.doi10.1002/aenm.201500936
dc.identifier.issn1614-6832
dc.identifier.issn1614-6840
dc.identifier.orcidQiao, S. [0000-0002-1220-1761] [0000-0002-4568-8422]
dc.identifier.urihttp://hdl.handle.net/2440/94970
dc.language.isoen
dc.publisherWiley
dc.relation.granthttp://purl.org/au-research/grants/arc/DP140104062
dc.relation.granthttp://purl.org/au-research/grants/arc/DP130104459
dc.rights© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
dc.source.urihttps://doi.org/10.1002/aenm.201500936
dc.titleThree-dimensional smart catalyst electrode for oxygen evolution reaction
dc.typeJournal article
pubs.publication-statusPublished

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