Balancing Mass Transfer and Active Sites to Improve Electrocatalytic Oxygen Reduction by B,N Codoped C Nanoreactors.

Wang, X; Liu, T; Li, H; Han, C; Su, P; Ta, N; Jiang, SP; Kong, B; Liu, J; Huang, Z

Balancing Mass Transfer and Active Sites to Improve Electrocatalytic Oxygen Reduction by B,N Codoped C Nanoreactors.

Wang, X Liu, T Li, H Han, C Su, P Ta, N Jiang, SP Kong, B Liu, J Huang, Z

Permalink

Publisher:: American Chemical Society (ACS)
Publication Type:: Journal Article
Citation:: Nano Lett, 2023
Issue Date:: 2023-03-23

Open Access

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is open access.

The embargo period expires on 23 Mar 2024

Adobe PDF

Download Accepted versionAdobe PDF (1.23 MB)

View on publisher's site

View statistics

Full metadata record

Field	Value	Language
dc.contributor.author	Wang, X
dc.contributor.author	Liu, T
dc.contributor.author	Li, H
dc.contributor.author	Han, C
dc.contributor.author	Su, P
dc.contributor.author	Ta, N
dc.contributor.author	Jiang, SP
dc.contributor.author	Kong, B
dc.contributor.author	Liu, J
dc.contributor.author	Huang, Z https://orcid.org/0000-0003-1985-0884
dc.date.accessioned	2023-05-04T11:38:57Z
dc.date.available	2023-05-04T11:38:57Z
dc.date.issued	2023-03-23
dc.identifier.citation	Nano Lett, 2023
dc.identifier.issn	1530-6984
dc.identifier.issn	1530-6992
dc.identifier.uri	http://hdl.handle.net/10453/170200
dc.description.abstract	Mass transfer is critical in catalytic processes, especially when the reactions are facilitated by nanostructured catalysts. Strong efforts have been devoted to improving the efficacy and quantity of active sites, but often, mass transfer has not been well studied. Herein, we demonstrate the importance of mass transfer in the electrocatalytic oxygen reduction reaction (ORR) by tailoring the pore sizes. Using a confined-etching strategy, we fabricate boron- and nitrogen-doped carbon (B,N@C) electrocatalysts featuring abundant active sites but different porous structures. The ORR performance of these catalysts is found to correlate with diffusion of the reactant. The optimized B,N@C with trimodal-porous structures feature enhanced O2 diffusion and better activity per heteroatomic site toward the ORR process. This work demonstrates the significance of the nanoarchitecture engineering of catalysts and sheds light on how to optimize structures featuring abundant active sites and enhanced mass transfer.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	American Chemical Society (ACS)
dc.relation	http://purl.org/au-research/grants/arc/FT190100658
dc.relation.ispartof	Nano Lett
dc.relation.isbasedon	10.1021/acs.nanolett.3c00202
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.rights	This document is the Accepted Manuscript version of a Published Work that appeared in final form in [ACS Nano Lett, 2023], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://doi.org/10.1021/acs.nanolett.3c00202 ].”
dc.subject.classification	Nanoscience & Nanotechnology
dc.title	Balancing Mass Transfer and Active Sites to Improve Electrocatalytic Oxygen Reduction by B,N Codoped C Nanoreactors.
dc.type	Journal Article
utslib.location.activity	United States
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 Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2024-03-23T00:00:00+1000Z
dc.date.updated	2023-05-04T11:38:51Z
pubs.publication-status	Published online

Abstract:

Mass transfer is critical in catalytic processes, especially when the reactions are facilitated by nanostructured catalysts. Strong efforts have been devoted to improving the efficacy and quantity of active sites, but often, mass transfer has not been well studied. Herein, we demonstrate the importance of mass transfer in the electrocatalytic oxygen reduction reaction (ORR) by tailoring the pore sizes. Using a confined-etching strategy, we fabricate boron- and nitrogen-doped carbon (B,N@C) electrocatalysts featuring abundant active sites but different porous structures. The ORR performance of these catalysts is found to correlate with diffusion of the reactant. The optimized B,N@C with trimodal-porous structures feature enhanced O2 diffusion and better activity per heteroatomic site toward the ORR process. This work demonstrates the significance of the nanoarchitecture engineering of catalysts and sheds light on how to optimize structures featuring abundant active sites and enhanced mass transfer.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/170200