Identification of electrocatalytic oxygen reduction (ORR) activity of boron in graphene oxide; incorporated as a charge-adsorbate and/or substitutional p-type dopant

Pourazadi, E; Haque, E; Faisal, SN; Harris, AT

Identification of electrocatalytic oxygen reduction (ORR) activity of boron in graphene oxide; incorporated as a charge-adsorbate and/or substitutional p-type dopant

Pourazadi, E Haque, E Faisal, SN Harris, AT

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Publisher:: ELSEVIER SCIENCE SA
Publication Type:: Journal Article
Citation:: Materials Chemistry and Physics, 2018, 207, pp. 380-388
Issue Date:: 2018-03-01

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Field	Value	Language
dc.contributor.author	Pourazadi, E
dc.contributor.author	Haque, E
dc.contributor.author	Faisal, SN
dc.contributor.author	Harris, AT
dc.date.accessioned	2022-09-07T22:32:27Z
dc.date.available	2022-09-07T22:32:27Z
dc.date.issued	2018-03-01
dc.identifier.citation	Materials Chemistry and Physics, 2018, 207, pp. 380-388
dc.identifier.issn	0254-0584
dc.identifier.issn	1879-3312
dc.identifier.uri	http://hdl.handle.net/10453/161498
dc.description.abstract	This work is investigating electrocatalytic performance of boron (B) in two diverse classes of graphene hybrid materials; i) the pillared graphene organic framework (GOF) which is a type of adsorbate-induced boron doped graphene and ii) the substitutionally boron doped graphene (i.e. integrated boron in disrupted graphene lattice (BG)). Raman spectroscopy and X-ray Photoelectron Spectroscopy (XPS) are among the key tools to identify chemical states of doped boron as well as its surface composition. Electron transfer efficiency of the easily synthesised GOFs (with CBO2 active chemistries) is compared with commonly cited BGs (with distinctive CBO2/BC3 moieties) which are synthesised under more rigorous thermal conditions. The intriguing feature of swelled GOFs is due to their mild solvothermal synthesising condition while managing electrochemical oxygen reduction reaction (ORR) through a dominant 4e− pathway (i.e. based on Rotating-Disk Electrode (RDE) results). GOF has feasibility for scalable production and a performance which is comparable to former BGs materials. The new GOF undergoes subsequent structural modifications via electrochemical polishing (i.e. chronoamperometry) to enhance its ORR efficiency and conductivity. Results indicate about a 30% boost in O2-reduction performance of electrochemically reduced GOF (E.r.GOF) compared to native graphene organic framework and also substantial improvement in its former onset-potential (approx. 100 mV).
dc.language	English
dc.publisher	ELSEVIER SCIENCE SA
dc.relation.ispartof	Materials Chemistry and Physics
dc.relation.isbasedon	10.1016/j.matchemphys.2017.12.090
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0303 Macromolecular and Materials Chemistry, 0912 Materials Engineering, 1007 Nanotechnology
dc.subject.classification	Materials
dc.title	Identification of electrocatalytic oxygen reduction (ORR) activity of boron in graphene oxide; incorporated as a charge-adsorbate and/or substitutional p-type dopant
dc.type	Journal Article
utslib.citation.volume	207
utslib.for	0303 Macromolecular and Materials Chemistry
utslib.for	0912 Materials Engineering
utslib.for	1007 Nanotechnology
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2022-09-07T22:32:25Z
pubs.publication-status	Published
pubs.volume	207

Abstract:

This work is investigating electrocatalytic performance of boron (B) in two diverse classes of graphene hybrid materials; i) the pillared graphene organic framework (GOF) which is a type of adsorbate-induced boron doped graphene and ii) the substitutionally boron doped graphene (i.e. integrated boron in disrupted graphene lattice (BG)). Raman spectroscopy and X-ray Photoelectron Spectroscopy (XPS) are among the key tools to identify chemical states of doped boron as well as its surface composition. Electron transfer efficiency of the easily synthesised GOFs (with CBO2 active chemistries) is compared with commonly cited BGs (with distinctive CBO2/BC3 moieties) which are synthesised under more rigorous thermal conditions. The intriguing feature of swelled GOFs is due to their mild solvothermal synthesising condition while managing electrochemical oxygen reduction reaction (ORR) through a dominant 4e− pathway (i.e. based on Rotating-Disk Electrode (RDE) results). GOF has feasibility for scalable production and a performance which is comparable to former BGs materials. The new GOF undergoes subsequent structural modifications via electrochemical polishing (i.e. chronoamperometry) to enhance its ORR efficiency and conductivity. Results indicate about a 30% boost in O2-reduction performance of electrochemically reduced GOF (E.r.GOF) compared to native graphene organic framework and also substantial improvement in its former onset-potential (approx. 100 mV).

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