In:
Angewandte Chemie, Wiley, Vol. 135, No. 3 ( 2023-01-16)
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 (Co 2 ) oct O 4 nanosheets (NSs) at fixed geometrical sites, including Mn oct , Ni oct , and Ni tet , to optimize the initial geometrical structure and modulate the CoCo 2 O 4 surface from oxygen‐excess to oxygen‐deficiency. The pristine (Ni,Mn)‐(Co) tet (Co 2 ) oct O 4 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 (Co 2 ) oct O 4 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.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.202214600
Language:
English
Publisher:
Wiley
Publication Date:
2023
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505868-5
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514305-6
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505872-7
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1479266-7
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506259-7
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