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. 2016 Aug 23;7:12552. doi: 10.1038/ncomms12552

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International 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/4.0/

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(a) Photograph of the tandem cell. (b) Illustration of the electron transfer pathway in the tandem cell. (c) Hydrogen evolution at the cathode in the presence (red squares) or absence (black diamonds) of the herbicide DCMU. (d) The influence of the incident light intensity (P_in) on the photocurrent (blue curve) and power accumulated in hydrogen bonds (red curve) produced by the tandem cell. The error bars in c,d represent the s.d. in four independent measurements.