Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 10, Pages 5245-5249Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202014317
Keywords
hydrogen production; photocatalysis; phytic acid; polymeric carbon nitride; nickel
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Funding
- Innovation Entrepreneurship Program of Jiangsu Province [Suren caiban [2016] 32]
- National Natural Science Foundation of China [21878129]
- Industry Prospect and Key Core Technology (Competition Project) of Jiangsu Province [BE 2019093]
- Sino-German Cooperation Group Project [GZ1579]
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The study presents a molecular-semiconductor photocatalytic system (MSPS) composed of a phytic acid nickel biomimetic complex and polymeric carbon nitride, which shows outstanding hydrogen production activity under the near-infrared spectrum. The MSPS not only enhances the hydrogen production activity but also reduces the need for noble metals.
A challenge in photocatalysis consists in improving the efficiency by harnessing a large portion of the solar spectrum. We report the design and realization of a robust molecular-semiconductor photocatalytic system (MSPS) consisting of an earth-abundant phytic acid nickel (PA-Ni) biomimetic complex and polymeric carbon nitride (PCN). The MSPS exhibits an outstanding activity at lambda=940 nm with high apparent quantum efficiency (AQE) of 2.8 %, particularly lambda>900 nm, as it outperforms all reported state-of-the-art near-infrared (NIR) hybrid photocatalysts without adding any noble metals. The optimum hydrogen (H-2) production activity was about 52 and 64 times higher with respect to its pristine counterpart under the AM 1.5 G and visible irradiation, respectively, being equivalent to the platinum-assisted PCN. This work sheds light on feasible avenues to prepare highly active, stable, cheap NIR-harvesting photosystems toward sustainable and scalable solar-to-H-2 production.
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