Boosting oxygen evolution reaction activity by tailoring MOF-derived hierarchical Co-Ni alloy nanoparticles encapsulated in nitrogen-doped carbon frameworks.
RSC Adv
; 11(18): 10874-10880, 2021 Mar 10.
Article
em En
| MEDLINE
| ID: mdl-35423600
ABSTRACT
The growing demand for sustainable energy has led to in-depth research on hydrogen production from electrolyzed water, where the development of electrocatalysts is a top priority. We here report a controllable strategy for preparing the cobalt-nickel alloy nanoparticles encapsulated in nitrogen-doped porous carbon by annealing a bimetal-organic framework. The delicately tailored hierarchical Co2Ni@NC nanoparticles effectively realize abundant synergistic active sites and fast mass transfer for the oxygen evolution reaction (OER). Remarkably, the optimized Co2Ni@NC exhibits a small overpotential of 310 mV to achieve a current density of 10 mA cm-2 and an excellent long-term stability in alkaline electrolyte. Furthermore, the underlying synergistic effect mechanism of the Co-Ni model has been pioneeringly elucidated by density functional theory calculations.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
RSC Adv
Ano de publicação:
2021
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Article