Journal
ENERGY ADVANCES
Volume 2, Issue 6, Pages 805-812Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3ya00099k
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This study successfully synthesized atomically dispersed Co/Ni dual sites anchored on nitrogen-doped graphene, providing a promising approach to improve the electrocatalytic performance of transition metal single-atom catalysts.
Exploring durable, inexpensive and high-activity electrocatalysts for efficient water oxidation is a challenge in current research. Transition metal single-atom catalysts (SACs) have been widely studied as economical electrocatalysts. However, the oxygen evolution performances of SACs are unsatisfactory because the strong bonding force between electron-donating intermediates and transition metal sites weakens the catalytic performance. Herein, atomically dispersed Co/Ni dual sites embedded in nitrogen-doped graphene (labeled as CoNi-DSA/NG) were successfully synthesized. The CoNi-DSA/NG catalyst exhibits superior oxygen evolution reaction kinetics, performance, and stability owing to the atomic dual-metal sites and their intense synergism. This study presents a prospective way to remarkably enhance the electrocatalytic performance of SACs by establishing heteronuclear dual-metal sites, and thus to expand their use into practical energy storing and converting techniques. Atomically dispersed Co/Ni dual sites anchored on nitrogen-doped graphene (CoNi-DSA/NG) were implemented by a two-step pyrolysis strategy.
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