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Room temperature stable CO(x)-free H(2) production from methanol with magnesium oxide nanophotocatalysts

Methanol, which contains 12.6 weight percent hydrogen, is a good hydrogen storage medium because it is a liquid at room temperature. However, by releasing the hydrogen, undesirable CO and/or CO(2) byproducts are formed during catalytic fuel reforming. We show that alkaline earth metal oxides, in our...

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Autores principales: Liu, Zhengqing, Yin, Zongyou, Cox, Casandra, Bosman, Michel, Qian, Xiaofeng, Li, Na, Zhao, Hongyang, Du, Yaping, Li, Ju, Nocera, Daniel G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5428556/
https://www.ncbi.nlm.nih.gov/pubmed/28508036
http://dx.doi.org/10.1126/sciadv.1501425
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author Liu, Zhengqing
Yin, Zongyou
Cox, Casandra
Bosman, Michel
Qian, Xiaofeng
Li, Na
Zhao, Hongyang
Du, Yaping
Li, Ju
Nocera, Daniel G.
author_facet Liu, Zhengqing
Yin, Zongyou
Cox, Casandra
Bosman, Michel
Qian, Xiaofeng
Li, Na
Zhao, Hongyang
Du, Yaping
Li, Ju
Nocera, Daniel G.
author_sort Liu, Zhengqing
collection PubMed
description Methanol, which contains 12.6 weight percent hydrogen, is a good hydrogen storage medium because it is a liquid at room temperature. However, by releasing the hydrogen, undesirable CO and/or CO(2) byproducts are formed during catalytic fuel reforming. We show that alkaline earth metal oxides, in our case MgO nanocrystals, exhibit stable photocatalytic activity for CO/CO(2)-free H(2) production from liquid methanol at room temperature. The performance of MgO nanocrystals toward methanol dehydrogenation increases with time and approaches ~320 μmol g(−1) hour(−1) after a 2-day photocatalytic reaction. The CO(x)-free H(2) production is attributed to methanol photodecomposition to formaldehyde, photocatalyzed by surface electronic states of unique monodispersed, porous MgO nanocrystals, which were synthesized with a novel facile colloidal chemical strategy. An oxygen plasma treatment allows for the removal of organic surfactants, producing MgO nanocrystals that are well dispersible in methanol.
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spelling pubmed-54285562017-05-15 Room temperature stable CO(x)-free H(2) production from methanol with magnesium oxide nanophotocatalysts Liu, Zhengqing Yin, Zongyou Cox, Casandra Bosman, Michel Qian, Xiaofeng Li, Na Zhao, Hongyang Du, Yaping Li, Ju Nocera, Daniel G. Sci Adv Research Articles Methanol, which contains 12.6 weight percent hydrogen, is a good hydrogen storage medium because it is a liquid at room temperature. However, by releasing the hydrogen, undesirable CO and/or CO(2) byproducts are formed during catalytic fuel reforming. We show that alkaline earth metal oxides, in our case MgO nanocrystals, exhibit stable photocatalytic activity for CO/CO(2)-free H(2) production from liquid methanol at room temperature. The performance of MgO nanocrystals toward methanol dehydrogenation increases with time and approaches ~320 μmol g(−1) hour(−1) after a 2-day photocatalytic reaction. The CO(x)-free H(2) production is attributed to methanol photodecomposition to formaldehyde, photocatalyzed by surface electronic states of unique monodispersed, porous MgO nanocrystals, which were synthesized with a novel facile colloidal chemical strategy. An oxygen plasma treatment allows for the removal of organic surfactants, producing MgO nanocrystals that are well dispersible in methanol. American Association for the Advancement of Science 2016-09-02 /pmc/articles/PMC5428556/ /pubmed/28508036 http://dx.doi.org/10.1126/sciadv.1501425 Text en Copyright © 2016, The Authors http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Liu, Zhengqing
Yin, Zongyou
Cox, Casandra
Bosman, Michel
Qian, Xiaofeng
Li, Na
Zhao, Hongyang
Du, Yaping
Li, Ju
Nocera, Daniel G.
Room temperature stable CO(x)-free H(2) production from methanol with magnesium oxide nanophotocatalysts
title Room temperature stable CO(x)-free H(2) production from methanol with magnesium oxide nanophotocatalysts
title_full Room temperature stable CO(x)-free H(2) production from methanol with magnesium oxide nanophotocatalysts
title_fullStr Room temperature stable CO(x)-free H(2) production from methanol with magnesium oxide nanophotocatalysts
title_full_unstemmed Room temperature stable CO(x)-free H(2) production from methanol with magnesium oxide nanophotocatalysts
title_short Room temperature stable CO(x)-free H(2) production from methanol with magnesium oxide nanophotocatalysts
title_sort room temperature stable co(x)-free h(2) production from methanol with magnesium oxide nanophotocatalysts
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5428556/
https://www.ncbi.nlm.nih.gov/pubmed/28508036
http://dx.doi.org/10.1126/sciadv.1501425
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