Boosting bifunctional oxygen electrocatalysis with 3D graphene aerogel-supported Ni/MnO particles

Electrocatalysts for oxygen-reduction and oxygen-evolution reactions (ORR and OER) are crucial for metal-air batteries, where more costly Pt- and Ir/Ru-based materials are the benchmark catalysts for ORR and OER, respectively. Herein, for the first time Ni is combined with MnO species, and a 3D poro...

Full description

Saved in:
Bibliographic Details
Main Authors: Fu, Gengtao, Yan, Xiaoxiao, Chen, Yifan, Xu, Lin, Sun, Dongmei, Lee, Jong-Min, Tang, Yawen
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2020
Subjects:
Online Access:https://hdl.handle.net/10356/138749
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-138749
record_format dspace
spelling sg-ntu-dr.10356-1387492020-05-12T06:32:17Z Boosting bifunctional oxygen electrocatalysis with 3D graphene aerogel-supported Ni/MnO particles Fu, Gengtao Yan, Xiaoxiao Chen, Yifan Xu, Lin Sun, Dongmei Lee, Jong-Min Tang, Yawen School of Chemical and Biomedical Engineering Engineering::Chemical engineering 3D Porous Graphene Aerogels Bifunctional Electrocatalysts Electrocatalysts for oxygen-reduction and oxygen-evolution reactions (ORR and OER) are crucial for metal-air batteries, where more costly Pt- and Ir/Ru-based materials are the benchmark catalysts for ORR and OER, respectively. Herein, for the first time Ni is combined with MnO species, and a 3D porous graphene aerogel-supported Ni/MnO (Ni-MnO/rGO aerogel) bifunctional catalyst is prepared via a facile and scalable hydrogel route. The synthetic strategy depends on the formation of a graphene oxide (GO) crosslinked poly(vinyl alcohol) hydrogel that allows for the efficient capture of highly active Ni/MnO particles after pyrolysis. Remarkably, the resulting Ni-MnO/rGO aerogels exhibit superior bifunctional catalytic performance for both ORR and OER in an alkaline electrolyte, which can compete with the previously reported bifunctional electrocatalysts. The MnO mainly contributes to the high activity for the ORR, while metallic Ni is responsible for the excellent OER activity. Moreover, such bifunctional catalyst can endow the homemade Zn-air battery with better power density, specific capacity, and cycling stability than mixed Pt/C + RuO2 catalysts, demonstrating its potential feasibility in practical application of rechargeable metal-air batteries. 2020-05-12T06:32:17Z 2020-05-12T06:32:17Z 2017 Journal Article Fu, G., Yan, X., Chen, Y., Xu, L., Sun, D., Lee, J.-M., & Tang, Y. (2018). Boosting bifunctional oxygen electrocatalysis with 3D graphene aerogel-supported Ni/MnO particles. Advanced Materials, 30(5), 1704609-. doi:10.1002/adma.201704609 0935-9648 https://hdl.handle.net/10356/138749 10.1002/adma.201704609 29235164 2-s2.0-85038240184 5 30 en Advanced Materials © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Advanced Materials and is made available with permission of WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Chemical engineering
3D Porous Graphene Aerogels
Bifunctional Electrocatalysts
spellingShingle Engineering::Chemical engineering
3D Porous Graphene Aerogels
Bifunctional Electrocatalysts
Fu, Gengtao
Yan, Xiaoxiao
Chen, Yifan
Xu, Lin
Sun, Dongmei
Lee, Jong-Min
Tang, Yawen
Boosting bifunctional oxygen electrocatalysis with 3D graphene aerogel-supported Ni/MnO particles
description Electrocatalysts for oxygen-reduction and oxygen-evolution reactions (ORR and OER) are crucial for metal-air batteries, where more costly Pt- and Ir/Ru-based materials are the benchmark catalysts for ORR and OER, respectively. Herein, for the first time Ni is combined with MnO species, and a 3D porous graphene aerogel-supported Ni/MnO (Ni-MnO/rGO aerogel) bifunctional catalyst is prepared via a facile and scalable hydrogel route. The synthetic strategy depends on the formation of a graphene oxide (GO) crosslinked poly(vinyl alcohol) hydrogel that allows for the efficient capture of highly active Ni/MnO particles after pyrolysis. Remarkably, the resulting Ni-MnO/rGO aerogels exhibit superior bifunctional catalytic performance for both ORR and OER in an alkaline electrolyte, which can compete with the previously reported bifunctional electrocatalysts. The MnO mainly contributes to the high activity for the ORR, while metallic Ni is responsible for the excellent OER activity. Moreover, such bifunctional catalyst can endow the homemade Zn-air battery with better power density, specific capacity, and cycling stability than mixed Pt/C + RuO2 catalysts, demonstrating its potential feasibility in practical application of rechargeable metal-air batteries.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Fu, Gengtao
Yan, Xiaoxiao
Chen, Yifan
Xu, Lin
Sun, Dongmei
Lee, Jong-Min
Tang, Yawen
format Article
author Fu, Gengtao
Yan, Xiaoxiao
Chen, Yifan
Xu, Lin
Sun, Dongmei
Lee, Jong-Min
Tang, Yawen
author_sort Fu, Gengtao
title Boosting bifunctional oxygen electrocatalysis with 3D graphene aerogel-supported Ni/MnO particles
title_short Boosting bifunctional oxygen electrocatalysis with 3D graphene aerogel-supported Ni/MnO particles
title_full Boosting bifunctional oxygen electrocatalysis with 3D graphene aerogel-supported Ni/MnO particles
title_fullStr Boosting bifunctional oxygen electrocatalysis with 3D graphene aerogel-supported Ni/MnO particles
title_full_unstemmed Boosting bifunctional oxygen electrocatalysis with 3D graphene aerogel-supported Ni/MnO particles
title_sort boosting bifunctional oxygen electrocatalysis with 3d graphene aerogel-supported ni/mno particles
publishDate 2020
url https://hdl.handle.net/10356/138749
_version_ 1681057689255280640