Universität zu Köln

Heim, Leo E., Schloerer, Nils E., Choi, Jong-Hoo ORCID: 0000-0001-7938-8420 and Prechtl, Martin H. G. ORCID: 0000-0003-2155-8006 (2014). Selective and mild hydrogen production using water and formaldehyde. Nat. Commun., 5. LONDON: NATURE PUBLISHING GROUP. ISSN 2041-1723

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Abstract

With the increased efforts in finding new energy storage systems for mobile and stationary applications, an intensively studied fuel molecule is dihydrogen owing to its energy content, and the possibility to store it in the form of hydridic and protic hydrogen, for example, in liquid organic hydrogen carriers. Here we show that water in the presence of paraformaldehyde or formaldehyde is suitable for molecular hydrogen storage, as these molecules form stable methanediol, which can be easily and selectively dehydrogenated forming hydrogen and carbon dioxide. In this system, both molecules are hydrogen sources, yielding a theoretical weight efficiency of 8.4% assuming one equivalent of water and one equivalent of formaldehyde. Thus it is potentially higher than formic acid (4.4 wt%), as even when technical aqueous formaldehyde (37 wt%) is used, the diluted methanediol solution has an efficiency of 5.0 wt%. The hydrogen can be efficiently generated in the presence of air using a ruthenium catalyst at low temperature.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Heim, Leo E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schloerer, Nils E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, Jong-Hoo UNSPECIFIED orcid.org/0000-0001-7938-8420 UNSPECIFIED Prechtl, Martin H. G. UNSPECIFIED orcid.org/0000-0003-2155-8006 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-441366
DOI:	10.1038/ncomms4621
Journal or Publication Title:	Nat. Commun.
Volume:	5
Date:	2014
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	2041-1723
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FORMIC-ACID; CARBON-DIOXIDE; CO2 SELECTIVITY; METHANOL; DEHYDROGENATION; DECOMPOSITION; STORAGE; TEMPERATURE; CATALYST; METAL Multiple languages Multidisciplinary Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/44136