Pd nanoparticles on defective polymer carbon nitride: Enhanced activity and origin for electrocatalytic hydrodechlorination reaction

For the electrocatalytic hydrodechlorination reaction of 2,4-dichlorophenol to phenol, -C≡N or -Nv defects can effectively modulate the Pd-PCN interaction and promote the preferential adsorption of 2,4-dichlorophenol, resulting in an enhanced dechlorination efficiency. [Display omitted] Here we repo...

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Veröffentlicht in:Chinese chemical letters 2020-10, Vol.31 (10), p.2762-2768
Hauptverfasser: Shu, Song, Wang, Peng, Zhang, Wendong, Wang, Weilu, Li, Jianjun, Chu, Yinghao, Wei, Fusheng, Zhang, Xianming, Jiang, Guangming
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container_end_page 2768
container_issue 10
container_start_page 2762
container_title Chinese chemical letters
container_volume 31
creator Shu, Song
Wang, Peng
Zhang, Wendong
Wang, Weilu
Li, Jianjun
Chu, Yinghao
Wei, Fusheng
Zhang, Xianming
Jiang, Guangming
description For the electrocatalytic hydrodechlorination reaction of 2,4-dichlorophenol to phenol, -C≡N or -Nv defects can effectively modulate the Pd-PCN interaction and promote the preferential adsorption of 2,4-dichlorophenol, resulting in an enhanced dechlorination efficiency. [Display omitted] Here we report a facile defect-engineering strategy on the support to optimize the metal-support interaction and enhance the metal’s electrocatalytic hydrodechlorination performance in converting 2,4-dichlorophenol (2,4-DCP) to phenol. The specific activity of the Pd nanoparticles (Pd NPs) on defective polymer carbon nitride (Pd/PCN-x) reaches 0.09 min-1 m-2Pd, which is 1.5 times that of the Pd NPs supported on the perfect PCN (Pd/PCN-0). The combined experimental and theoretical results demonstrate that the strong adsorption of phenol on Pd/PCN-0 passivates the active sites, limiting the dechlorination progress. The PCN-x containing -C≡N defects can effectively mediate the spatial configuration and electronic structure of Pd NPs, and promote the preferential adsorption of 2,4-DCP rather than phenol, resulting in an enhanced dechlorination efficiency.
doi_str_mv 10.1016/j.cclet.2020.04.022
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[Display omitted] Here we report a facile defect-engineering strategy on the support to optimize the metal-support interaction and enhance the metal’s electrocatalytic hydrodechlorination performance in converting 2,4-dichlorophenol (2,4-DCP) to phenol. The specific activity of the Pd nanoparticles (Pd NPs) on defective polymer carbon nitride (Pd/PCN-x) reaches 0.09 min-1 m-2Pd, which is 1.5 times that of the Pd NPs supported on the perfect PCN (Pd/PCN-0). The combined experimental and theoretical results demonstrate that the strong adsorption of phenol on Pd/PCN-0 passivates the active sites, limiting the dechlorination progress. 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[Display omitted] Here we report a facile defect-engineering strategy on the support to optimize the metal-support interaction and enhance the metal’s electrocatalytic hydrodechlorination performance in converting 2,4-dichlorophenol (2,4-DCP) to phenol. The specific activity of the Pd nanoparticles (Pd NPs) on defective polymer carbon nitride (Pd/PCN-x) reaches 0.09 min-1 m-2Pd, which is 1.5 times that of the Pd NPs supported on the perfect PCN (Pd/PCN-0). The combined experimental and theoretical results demonstrate that the strong adsorption of phenol on Pd/PCN-0 passivates the active sites, limiting the dechlorination progress. 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[Display omitted] Here we report a facile defect-engineering strategy on the support to optimize the metal-support interaction and enhance the metal’s electrocatalytic hydrodechlorination performance in converting 2,4-dichlorophenol (2,4-DCP) to phenol. The specific activity of the Pd nanoparticles (Pd NPs) on defective polymer carbon nitride (Pd/PCN-x) reaches 0.09 min-1 m-2Pd, which is 1.5 times that of the Pd NPs supported on the perfect PCN (Pd/PCN-0). The combined experimental and theoretical results demonstrate that the strong adsorption of phenol on Pd/PCN-0 passivates the active sites, limiting the dechlorination progress. 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subjects Adsorption properties
Electrocatalysis
Hydrodechlorination
Metal-support interaction
N defects
title Pd nanoparticles on defective polymer carbon nitride: Enhanced activity and origin for electrocatalytic hydrodechlorination reaction
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