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Article Abstract
Poly(heptazine imide) (PHI), one of the crystalline or long-range ordered allotropes of polymeric carbon nitride, is a promising polymeric photocatalyst; however, preparation of highly crystalline PHI remains a challenge. Herein, through a bottom-up strategy involving repair of structural defects and increase of specific surface area of melon precursor, we prepared PHI nanorods with dramatically improved long-range order. The resulting PHI exhibited a shift of product selectivity in CO photoreduction from CO to CH with a high methanation activity in contrast to the pristine PHI with relatively low long-range order. The improvement of long-range order for PHI remarkably enhanced the separation efficiency and transfer kinetics of photogenerated charges as well as the adsorption for *CO intermediate. This study revealed the relationship between the precursor structure and PHI crystal growth in ionothermal synthesis, and also showcased the great potential of highly crystalline PHI in artificial photosynthesis.
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| http://dx.doi.org/10.1002/anie.202421263 | DOI Listing |
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