Balancing Activity and Stability in Spinel Cobalt Oxides through Geometrical Sites Occupation towards Efficient Electrocatalytic Oxygen Evolution

Li An; Hong Zhang; Jiamin Zhu; Shibo Xi; Bolong Huang; Mingzi Sun; Yong Peng; Pinxian Xi; Chun-Hua Yan

doi:10.1002/anie.202214600

Balancing Activity and Stability in Spinel Cobalt Oxides through Geometrical Sites Occupation towards Efficient Electrocatalytic Oxygen Evolution

Li An^*, Hong Zhang, Jiamin Zhu, Shibo Xi, Bolong Huang^*, Mingzi Sun, Yong Peng, Pinxian Xi^*, Chun-Hua Yan

^*Corresponding author for this work

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

76 Citations (Scopus)

Abstract

Designing active and stable oxygen evolution reaction (OER) catalysts are vitally important to various energy conversion devices. Herein, we introduce elements Ni and Mn into (Co)_tet(Co₂)_octO₄ nanosheets (NSs) at fixed geometrical sites, including Mn_oct, Ni_oct, and Ni_tet, to optimize the initial geometrical structure and modulate the CoCo₂O₄ surface from oxygen-excess to oxygen-deficiency. The pristine (Ni,Mn)-(Co)_tet(Co₂)_octO₄ NSs shows excellent OER activity with an overpotential of 281.6 mV at a current density of 10 mA cm⁻². Moreover, without damaging their initial activity, the activated (Act)-(Ni,Mn)-(Co)_tet(Co₂)_octO₄ NSs after surface reconstruction exhibit long-term stability of 100 h under 10 mA cm⁻², 50 mA cm⁻², or even 100 mA cm⁻². The optimal balance between electroactivity and stability leads to remarkable OER performances, providing a pivotal guideline for designing ideal electrocatalysts and inspiring more works to focus on the dynamic change of each occupation site component. © 2022 Wiley-VCH GmbH.

Original language	English
Article number	e202214600
Journal	Angewandte Chemie - International Edition
Volume	62
Issue number	3
Online published	11 Nov 2022
DOIs	https://doi.org/10.1002/anie.202214600
Publication status	Published - 16 Jan 2023
Externally published	Yes

Funding

We acknowledge support from the National Natural Science Foundation of China (No. 22201111, 21922105, 21931001, and 22271124), the National Key R&D Program of China (2021YFA1501101), and the National Natural Science Foundation of Gansu Province (22JR5RA470), the Special Fund Project of Guiding Scientific and Technological Innovation Development of Gansu Province (2019ZX-04) and the 111 Project (B20027). We also acknowledge support from the Fundamental Research Funds for the Central Universities (lzujbky-2021-sp62). B.H. acknowledges the support of the Natural Science Foundation of China (NSFC) (No. 21771156) and the Early Career Scheme (ECS) fund (Grant PolyU 253026/16P) from the Research Grant Council (RGC) in Hong Kong.

Research Keywords

decoupled proton-electron transfer
geometrical site occupation
OER
surface reconstruction
well-balanced performance

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title = "Balancing Activity and Stability in Spinel Cobalt Oxides through Geometrical Sites Occupation towards Efficient Electrocatalytic Oxygen Evolution",

abstract = "Designing active and stable oxygen evolution reaction (OER) catalysts are vitally important to various energy conversion devices. Herein, we introduce elements Ni and Mn into (Co)tet(Co2)octO4 nanosheets (NSs) at fixed geometrical sites, including Mnoct, Nioct, and Nitet, to optimize the initial geometrical structure and modulate the CoCo2O4 surface from oxygen-excess to oxygen-deficiency. The pristine (Ni,Mn)-(Co)tet(Co2)octO4 NSs shows excellent OER activity with an overpotential of 281.6 mV at a current density of 10 mA cm−2. Moreover, without damaging their initial activity, the activated (Act)-(Ni,Mn)-(Co)tet(Co2)octO4 NSs after surface reconstruction exhibit long-term stability of 100 h under 10 mA cm−2, 50 mA cm−2, or even 100 mA cm−2. The optimal balance between electroactivity and stability leads to remarkable OER performances, providing a pivotal guideline for designing ideal electrocatalysts and inspiring more works to focus on the dynamic change of each occupation site component. {\textcopyright} 2022 Wiley-VCH GmbH.",

keywords = "decoupled proton-electron transfer, geometrical site occupation, OER, surface reconstruction, well-balanced performance",

author = "Li An and Hong Zhang and Jiamin Zhu and Shibo Xi and Bolong Huang and Mingzi Sun and Yong Peng and Pinxian Xi and Chun-Hua Yan",

year = "2023",

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Balancing Activity and Stability in Spinel Cobalt Oxides through Geometrical Sites Occupation towards Efficient Electrocatalytic Oxygen Evolution. / An, Li; Zhang, Hong; Zhu, Jiamin et al.
In: Angewandte Chemie - International Edition, Vol. 62, No. 3, e202214600, 16.01.2023.

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

TY - JOUR

T1 - Balancing Activity and Stability in Spinel Cobalt Oxides through Geometrical Sites Occupation towards Efficient Electrocatalytic Oxygen Evolution

AU - An, Li

AU - Zhang, Hong

AU - Zhu, Jiamin

AU - Xi, Shibo

AU - Huang, Bolong

AU - Sun, Mingzi

AU - Peng, Yong

AU - Xi, Pinxian

AU - Yan, Chun-Hua

PY - 2023/1/16

Y1 - 2023/1/16

N2 - Designing active and stable oxygen evolution reaction (OER) catalysts are vitally important to various energy conversion devices. Herein, we introduce elements Ni and Mn into (Co)tet(Co2)octO4 nanosheets (NSs) at fixed geometrical sites, including Mnoct, Nioct, and Nitet, to optimize the initial geometrical structure and modulate the CoCo2O4 surface from oxygen-excess to oxygen-deficiency. The pristine (Ni,Mn)-(Co)tet(Co2)octO4 NSs shows excellent OER activity with an overpotential of 281.6 mV at a current density of 10 mA cm−2. Moreover, without damaging their initial activity, the activated (Act)-(Ni,Mn)-(Co)tet(Co2)octO4 NSs after surface reconstruction exhibit long-term stability of 100 h under 10 mA cm−2, 50 mA cm−2, or even 100 mA cm−2. The optimal balance between electroactivity and stability leads to remarkable OER performances, providing a pivotal guideline for designing ideal electrocatalysts and inspiring more works to focus on the dynamic change of each occupation site component. © 2022 Wiley-VCH GmbH.

AB - Designing active and stable oxygen evolution reaction (OER) catalysts are vitally important to various energy conversion devices. Herein, we introduce elements Ni and Mn into (Co)tet(Co2)octO4 nanosheets (NSs) at fixed geometrical sites, including Mnoct, Nioct, and Nitet, to optimize the initial geometrical structure and modulate the CoCo2O4 surface from oxygen-excess to oxygen-deficiency. The pristine (Ni,Mn)-(Co)tet(Co2)octO4 NSs shows excellent OER activity with an overpotential of 281.6 mV at a current density of 10 mA cm−2. Moreover, without damaging their initial activity, the activated (Act)-(Ni,Mn)-(Co)tet(Co2)octO4 NSs after surface reconstruction exhibit long-term stability of 100 h under 10 mA cm−2, 50 mA cm−2, or even 100 mA cm−2. The optimal balance between electroactivity and stability leads to remarkable OER performances, providing a pivotal guideline for designing ideal electrocatalysts and inspiring more works to focus on the dynamic change of each occupation site component. © 2022 Wiley-VCH GmbH.

KW - decoupled proton-electron transfer

KW - geometrical site occupation

KW - OER

KW - surface reconstruction

KW - well-balanced performance

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Balancing Activity and Stability in Spinel Cobalt Oxides through Geometrical Sites Occupation towards Efficient Electrocatalytic Oxygen Evolution

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