Journal
CHEMICAL SCIENCE
Volume 13, Issue 3, Pages 754-762Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1sc06555f
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Funding
- National Natural Science Foundation of China [21872082]
- Young Scholars Program of Shandong University in China [2018WLJH39]
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Single-atom Co-OH modified polymeric carbon nitride synthesized with ball milling exhibits excellent photocatalytic performance in overall water splitting by enhancing OER rate and apparent quantum yields under visible light irradiation.
Expediting the oxygen evolution reaction (OER) is the key to achieving efficient photocatalytic overall water splitting. Herein, single-atom Co-OH modified polymeric carbon nitride (Co-PCN) was synthesized with single-atom loading increased by similar to 37 times with the assistance of ball milling that formed ultrathin nanosheets. The single-atom Co-N4OH structure was confirmed experimentally and theoretically and was verified to enhance optical absorption and charge separation and work as the active site for the OER. Co-PCN exhibits the highest OER rate of 37.3 mu mol h(-1) under visible light irradiation, similar to 28-fold higher than that of common PCN/CoOx, with the highest apparent quantum yields reaching 4.69, 2.06, and 0.46% at 400, 420, and 500 nm, respectively, and is among the best OER photocatalysts reported so far. This work provides an effective way to synthesize efficient OER photocatalysts.
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