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DC Field | Value | Language |
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dc.contributor.author | Antil B. | |
dc.contributor.author | Kumar L. | |
dc.contributor.author | Ranjan R. | |
dc.contributor.author | Shenoy S. | |
dc.contributor.author | Tarafder K. | |
dc.contributor.author | Gopinath C.S. | |
dc.contributor.author | Deka S. | |
dc.date.accessioned | 2021-05-05T10:27:44Z | - |
dc.date.available | 2021-05-05T10:27:44Z | - |
dc.date.issued | 2021 | |
dc.identifier.citation | ACS Applied Energy Materials Vol. , , p. - | en_US |
dc.identifier.uri | https://doi.org/10.1021/acsaem.0c02858 | |
dc.identifier.uri | http://idr.nitk.ac.in/jspui/handle/123456789/15700 | - |
dc.description.abstract | The emerging metal-free carbon nitride (C3N4) offers prominent possibilities for realizing the highly effective hydrogen evolution reaction (HER). However, its poor surface conductivity and insufficient catalytic sites hinder the HER performance. Herein, a one-dimensional vermicular rope-like graphitic carbon nitride nanostructure is demonstrated that consists of multichannel tubular pores and high nitrogen content, which is fabricated through a cost-effective approach having the final stoichiometry g-C3N4.7 for HER application. The present g- C3N4.7 is unique owing to the presence of abundant channels for the diffusion process, modulated surface chemistry with richelectroactive sites from N-electron lone pairs, greatly reduced recombination rate of photoexcited exciton pairs, and a high donor concentration (4.26 × 1017 cm3). The catalyst offers a visible-light-driven photocatalytic H2 evolution rate as high as 4910 μ mol h-1 g-1 with an apparent quantum yield of 14.07% at band gap absorption (2.59 eV, 479 nm) under 7.68 mW cm-2 illumination. The number of hydrogen gas molecules produced is 1.307 × 1015 s-1 cm-2, which remained constant for a minimum of 18 h of repeated cycling in the HER without any degradation of the catalyst. In density functional theory calculations, a significant change in the band offset is observed due to N doping into the system in favor of electron catalysis. The theoretical band gap of a monolayer of g-C3N4.7 was enormously reduced because of the presence of additional densities of states from the doped N atom inside the band gap. These impurity or donor bands are formed inside the band gap region, which ultimately enhance the hydrogen ion reduction reaction enormously. © 2021 American Chemical Society. | en_US |
dc.title | One-dimensional multichannel g-C3N4.7nanostructure realizing an efficient photocatalytic hydrogen evolution reaction and its theoretical investigations | en_US |
dc.type | Article | en_US |
Appears in Collections: | 1. Journal Articles |
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