Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 315, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121551
Keywords
Saccharomycetes; CoNi Nano-alloys; N-doped carbon; Yolk-shell cage; Oxygen evolution reaction
Funding
- National Natural Science Foundation of China [U2067216, U2130109, 51902070]
- China Postdoctoral Science Foundation [2020M670904]
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A CoNi nano-alloys modified yolk-shell carbon cage catalyst was synthesized through a green synthesis method, exhibiting outstanding OER activity and stability, providing a new strategy for constructing catalysts for renewable energy systems.
Developing efficient and stable OER catalysts is conducive to improving hydrogen production efficiency and achieving carbon neutrality goal. Herein, a CoNi nano-alloys modified yolk-shell carbon cage (CoNi/NC-YS) catalyst was synthesized through a green synthesis method, which shows an outstanding OER activity with a low overpotential of 292 mV at 10 mA.cm(-2), and a robust OER catalytic stability. The experimental and density functional theory (DFT) results demonstrate that the hydrophilic yolk-shell CoNi/NC-YS catalyst with large specific area contributes to exposing more active sites, and increases the reaction contact area between catalysts and electrolyte. Meanwhile, CoNi nano-alloys can regulate the electronic configuration of CoNi/NC-YS catalyst and optimize Gibbs free energies for water adsorption, accelerating OER process in alkaline media and showing an outstanding OER performance. This work can provide a low-cost and green strategy to construct nano-alloys modified yolk-shell OER catalysts for renewable energy systems.
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