Dual-phase spinel MnCo2O4 and spinel MnCo 2O4/nanocarbon hybrids for electrocatalytic oxygen reduction and evolution

Xiaoming Ge; Yayuan Liu; F. W. Thomas Goh; T. S. Andy Hor; Yun Zong; Peng Xiao; Zheng Zhang; Suo Hon Lim; Bing Li; Xin Wang; Zhaolin Liu

doi:10.1021/am502675c

Dual-phase spinel MnCo₂O₄ and spinel MnCo ₂O₄/nanocarbon hybrids for electrocatalytic oxygen reduction and evolution

Xiaoming Ge, Yayuan Liu, F. W. Thomas Goh, T. S. Andy Hor, Yun Zong, Peng Xiao, Zheng Zhang, Suo Hon Lim, Bing Li, Xin Wang, Zhaolin Liu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

340 Citations (Scopus)

Abstract

Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential reactions for energy-storage and -conversion devices relying on oxygen electrochemistry. High-performance, nonprecious metal-based hybrid catalysts are developed from postsynthesis integration of dual-phase spinel MnCo ₂O₄ (dp-MnCo₂O₄) nanocrystals with nanocarbon materials, e.g., carbon nanotube (CNT) and nitrogen-doped reduced graphene oxide (N-rGO). The synergic covalent coupling between dp-MnCo ₂O₄ and nanocarbons effectively enhances both the bifunctional ORR and OER activities of the spinel/nanocarbon hybrid catalysts. The dp-MnCo₂O₄/N-rGO hybrid catalysts exhibited comparable ORR activity and superior OER activity compared to commercial 30 wt % platinum supported on carbon black (Pt/C). An electrically rechargeable zinc-air battery using dp-MnCo₂O₄/CNT hybrid catalysts on the cathode was successfully operated for 64 discharge-charge cycles (or 768 h equivalent), significantly outperforming the Pt/C counterpart, which could only survive up to 108 h under similar conditions. © 2014 American Chemical Society.

Original language	English
Pages (from-to)	12684-12691
Journal	ACS Applied Materials and Interfaces
Volume	6
Issue number	15
DOIs	https://doi.org/10.1021/am502675c
Publication status	Published - 13 Aug 2014
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

covalent coupling
metal-air battery
nanocarbon
oxygen evolution reaction
oxygen reduction reaction
spinel
transition-metal oxide

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title = "Dual-phase spinel MnCo2O4 and spinel MnCo 2O4/nanocarbon hybrids for electrocatalytic oxygen reduction and evolution",

abstract = "Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential reactions for energy-storage and -conversion devices relying on oxygen electrochemistry. High-performance, nonprecious metal-based hybrid catalysts are developed from postsynthesis integration of dual-phase spinel MnCo 2O4 (dp-MnCo2O4) nanocrystals with nanocarbon materials, e.g., carbon nanotube (CNT) and nitrogen-doped reduced graphene oxide (N-rGO). The synergic covalent coupling between dp-MnCo 2O4 and nanocarbons effectively enhances both the bifunctional ORR and OER activities of the spinel/nanocarbon hybrid catalysts. The dp-MnCo2O4/N-rGO hybrid catalysts exhibited comparable ORR activity and superior OER activity compared to commercial 30 wt % platinum supported on carbon black (Pt/C). An electrically rechargeable zinc-air battery using dp-MnCo2O4/CNT hybrid catalysts on the cathode was successfully operated for 64 discharge-charge cycles (or 768 h equivalent), significantly outperforming the Pt/C counterpart, which could only survive up to 108 h under similar conditions. {\textcopyright} 2014 American Chemical Society.",

keywords = "covalent coupling, metal-air battery, nanocarbon, oxygen evolution reaction, oxygen reduction reaction, spinel, transition-metal oxide",

author = "Xiaoming Ge and Yayuan Liu and Goh, {F. W. Thomas} and Hor, {T. S. Andy} and Yun Zong and Peng Xiao and Zheng Zhang and Lim, {Suo Hon} and Bing Li and Xin Wang and Zhaolin Liu",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected]. ",

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doi = "10.1021/am502675c",

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TY - JOUR

T1 - Dual-phase spinel MnCo2O4 and spinel MnCo 2O4/nanocarbon hybrids for electrocatalytic oxygen reduction and evolution

AU - Ge, Xiaoming

AU - Liu, Yayuan

AU - Goh, F. W. Thomas

AU - Hor, T. S. Andy

AU - Zong, Yun

AU - Xiao, Peng

AU - Zhang, Zheng

AU - Lim, Suo Hon

AU - Li, Bing

AU - Wang, Xin

AU - Liu, Zhaolin

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2014/8/13

Y1 - 2014/8/13

N2 - Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential reactions for energy-storage and -conversion devices relying on oxygen electrochemistry. High-performance, nonprecious metal-based hybrid catalysts are developed from postsynthesis integration of dual-phase spinel MnCo 2O4 (dp-MnCo2O4) nanocrystals with nanocarbon materials, e.g., carbon nanotube (CNT) and nitrogen-doped reduced graphene oxide (N-rGO). The synergic covalent coupling between dp-MnCo 2O4 and nanocarbons effectively enhances both the bifunctional ORR and OER activities of the spinel/nanocarbon hybrid catalysts. The dp-MnCo2O4/N-rGO hybrid catalysts exhibited comparable ORR activity and superior OER activity compared to commercial 30 wt % platinum supported on carbon black (Pt/C). An electrically rechargeable zinc-air battery using dp-MnCo2O4/CNT hybrid catalysts on the cathode was successfully operated for 64 discharge-charge cycles (or 768 h equivalent), significantly outperforming the Pt/C counterpart, which could only survive up to 108 h under similar conditions. © 2014 American Chemical Society.

AB - Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are essential reactions for energy-storage and -conversion devices relying on oxygen electrochemistry. High-performance, nonprecious metal-based hybrid catalysts are developed from postsynthesis integration of dual-phase spinel MnCo 2O4 (dp-MnCo2O4) nanocrystals with nanocarbon materials, e.g., carbon nanotube (CNT) and nitrogen-doped reduced graphene oxide (N-rGO). The synergic covalent coupling between dp-MnCo 2O4 and nanocarbons effectively enhances both the bifunctional ORR and OER activities of the spinel/nanocarbon hybrid catalysts. The dp-MnCo2O4/N-rGO hybrid catalysts exhibited comparable ORR activity and superior OER activity compared to commercial 30 wt % platinum supported on carbon black (Pt/C). An electrically rechargeable zinc-air battery using dp-MnCo2O4/CNT hybrid catalysts on the cathode was successfully operated for 64 discharge-charge cycles (or 768 h equivalent), significantly outperforming the Pt/C counterpart, which could only survive up to 108 h under similar conditions. © 2014 American Chemical Society.

KW - covalent coupling

KW - metal-air battery

KW - nanocarbon

KW - oxygen evolution reaction

KW - oxygen reduction reaction

KW - spinel

KW - transition-metal oxide

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