. 2014 Jun 2;5:4017. doi: 10.1038/ncomms5017
Copyright © 2014, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
Figure 1. The formic acid/carbon dioxide cycle for hydrogen storage.
