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Solar driven electrochromic photoelectrochemical fuel cell for simultaneous energy conversion, storage and self-powered sensing

Abstract

One solar-driven electrochromic photoelectrochemical fuel cell (PFC) with highly efficient energy conversion and storage is easily constructed to achieve quantitative self-powered sensing. Layered bismuth oxyiodide-zinc oxide nanorod arrays (ZnO@BiOI NRA) with core/shell p-n heterostructure are fabricated as the photoanode with electrochromic Prussian blue (PB) as the cathode. The core/shell p-n heterostructure for ZnO@BiOI photoanode can effectively boost the photoelectrochemical (PEC) performance through the improvement of photon absorption and charge carrier separation. The optimal assembled PFC yields an open-circuit voltage (Voc) of 0.48 V with a maximum power output density (Pmax) as high as 155 μW·cm-2 upon illumination. Benefitting from the interactive color-changing behavior of PB, the cathode not only exhibits cathodic catalytic activity in PFC but also serves as an electrochromic display for self-powered sensing. The as-constructed PFC possesses multiple readable signal output nanochannels through the maximum power output density (Pmax) of PFC or the color change of of PB. Meanwhile, the dual signal outputs that makes the as-constructed self-powered sensor highly available in various operation demands with the enhanced reliability. With the advantages of high efficiency of PFC, unique assay ability, and broad environmental suitability, the constructed self-powered platform shows broad application prospect as the integrated smart analytical device.

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Supplementary files

Publication details

The article was received on 13 Dec 2017, accepted on 11 Jan 2018 and first published on 12 Jan 2018


Article type: Paper
DOI: 10.1039/C7NR09275J
Citation: Nanoscale, 2018, Accepted Manuscript
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    Solar driven electrochromic photoelectrochemical fuel cell for simultaneous energy conversion, storage and self-powered sensing

    Y. Wang, L. Zhang, K. Cui, C. Xu, H. Li, H. Liu and J. Yu, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C7NR09275J

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