Cargando…

Few-Atomic-Layers Iron for Hydrogen Evolution from Water by Photoelectrocatalysis

The carbon-free production of hydrogen from water splitting holds grand promise for the critical energy and environmental challenges. Herein, few-atomic-layers iron (Fe(FAL)) anchored on GaN nanowire arrays (NWs) is demonstrated as a highly active hydrogen evolution reaction catalyst, attributing to...

Descripción completa

Detalles Bibliográficos
Autores principales: Zhou, Baowen, Ou, Pengfei, Rashid, Roksana Tonny, Vanka, Srinivas, Sun, Kai, Yao, Lin, Sun, Haiding, Song, Jun, Mi, Zetian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7559863/
https://www.ncbi.nlm.nih.gov/pubmed/33089102
http://dx.doi.org/10.1016/j.isci.2020.101613
_version_ 1783594957819346944
author Zhou, Baowen
Ou, Pengfei
Rashid, Roksana Tonny
Vanka, Srinivas
Sun, Kai
Yao, Lin
Sun, Haiding
Song, Jun
Mi, Zetian
author_facet Zhou, Baowen
Ou, Pengfei
Rashid, Roksana Tonny
Vanka, Srinivas
Sun, Kai
Yao, Lin
Sun, Haiding
Song, Jun
Mi, Zetian
author_sort Zhou, Baowen
collection PubMed
description The carbon-free production of hydrogen from water splitting holds grand promise for the critical energy and environmental challenges. Herein, few-atomic-layers iron (Fe(FAL)) anchored on GaN nanowire arrays (NWs) is demonstrated as a highly active hydrogen evolution reaction catalyst, attributing to the spatial confinement and the nitrogen-terminated surface of GaN NWs. Based on density functional theory calculations, the hydrogen adsorption on Fe(FAL):GaN NWs is found to exhibit a significantly low free energy of −0.13 eV, indicative of high activity. Meanwhile, its outstanding optoelectronic properties are realized by the strong electronic coupling between atomic iron layers and GaN(10ī0) together with the nearly defect-free GaN NWs. As a result, Fe(FAL):GaN NWs/n(+)-p Si exhibits a prominent current density of ∼ −30 mA cm(−2) at an overpotential of ∼0.2 V versus reversible hydrogen electrode with a decent onset potential of +0.35 V and 98% Faradaic efficiency in 0.5 mol/L KHCO(3) aqueous solution under standard one-sun illumination.
format Online
Article
Text
id pubmed-7559863
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher Elsevier
record_format MEDLINE/PubMed
spelling pubmed-75598632020-10-20 Few-Atomic-Layers Iron for Hydrogen Evolution from Water by Photoelectrocatalysis Zhou, Baowen Ou, Pengfei Rashid, Roksana Tonny Vanka, Srinivas Sun, Kai Yao, Lin Sun, Haiding Song, Jun Mi, Zetian iScience Article The carbon-free production of hydrogen from water splitting holds grand promise for the critical energy and environmental challenges. Herein, few-atomic-layers iron (Fe(FAL)) anchored on GaN nanowire arrays (NWs) is demonstrated as a highly active hydrogen evolution reaction catalyst, attributing to the spatial confinement and the nitrogen-terminated surface of GaN NWs. Based on density functional theory calculations, the hydrogen adsorption on Fe(FAL):GaN NWs is found to exhibit a significantly low free energy of −0.13 eV, indicative of high activity. Meanwhile, its outstanding optoelectronic properties are realized by the strong electronic coupling between atomic iron layers and GaN(10ī0) together with the nearly defect-free GaN NWs. As a result, Fe(FAL):GaN NWs/n(+)-p Si exhibits a prominent current density of ∼ −30 mA cm(−2) at an overpotential of ∼0.2 V versus reversible hydrogen electrode with a decent onset potential of +0.35 V and 98% Faradaic efficiency in 0.5 mol/L KHCO(3) aqueous solution under standard one-sun illumination. Elsevier 2020-09-28 /pmc/articles/PMC7559863/ /pubmed/33089102 http://dx.doi.org/10.1016/j.isci.2020.101613 Text en © 2020. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Zhou, Baowen
Ou, Pengfei
Rashid, Roksana Tonny
Vanka, Srinivas
Sun, Kai
Yao, Lin
Sun, Haiding
Song, Jun
Mi, Zetian
Few-Atomic-Layers Iron for Hydrogen Evolution from Water by Photoelectrocatalysis
title Few-Atomic-Layers Iron for Hydrogen Evolution from Water by Photoelectrocatalysis
title_full Few-Atomic-Layers Iron for Hydrogen Evolution from Water by Photoelectrocatalysis
title_fullStr Few-Atomic-Layers Iron for Hydrogen Evolution from Water by Photoelectrocatalysis
title_full_unstemmed Few-Atomic-Layers Iron for Hydrogen Evolution from Water by Photoelectrocatalysis
title_short Few-Atomic-Layers Iron for Hydrogen Evolution from Water by Photoelectrocatalysis
title_sort few-atomic-layers iron for hydrogen evolution from water by photoelectrocatalysis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7559863/
https://www.ncbi.nlm.nih.gov/pubmed/33089102
http://dx.doi.org/10.1016/j.isci.2020.101613
work_keys_str_mv AT zhoubaowen fewatomiclayersironforhydrogenevolutionfromwaterbyphotoelectrocatalysis
AT oupengfei fewatomiclayersironforhydrogenevolutionfromwaterbyphotoelectrocatalysis
AT rashidroksanatonny fewatomiclayersironforhydrogenevolutionfromwaterbyphotoelectrocatalysis
AT vankasrinivas fewatomiclayersironforhydrogenevolutionfromwaterbyphotoelectrocatalysis
AT sunkai fewatomiclayersironforhydrogenevolutionfromwaterbyphotoelectrocatalysis
AT yaolin fewatomiclayersironforhydrogenevolutionfromwaterbyphotoelectrocatalysis
AT sunhaiding fewatomiclayersironforhydrogenevolutionfromwaterbyphotoelectrocatalysis
AT songjun fewatomiclayersironforhydrogenevolutionfromwaterbyphotoelectrocatalysis
AT mizetian fewatomiclayersironforhydrogenevolutionfromwaterbyphotoelectrocatalysis