Metal-encapsulated organolead halide perovskite photocathode for solar-driven hydrogen evolution in water.
Pazos-Outón, Luis M
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Crespo-Quesada, M., Pazos-Outón, L. M., Warnan, J., Kuehnel, M., Friend, R., & Reisner, E. (2016). Metal-encapsulated organolead halide perovskite photocathode for solar-driven hydrogen evolution in water.. Nature Communications, 7 (12555)https://doi.org/10.1038/ncomms12555
Lead-halide perovskites have triggered the latest breakthrough in photovoltaic technology. Despite the great promise shown by these materials, their instability towards water even in the presence of low amounts of moisture makes them, a priori, unsuitable for their direct use as light harvesters in aqueous solution for the production of hydrogen through water splitting. Here, we present a simple method that enables their use in photoelectrocatalytic hydrogen evolution while immersed in an aqueous solution. Field's metal, a fusible InBiSn alloy, is used to efficiently protect the perovskite from water while simultaneously allowing the photogenerated electrons to reach a Pt hydrogen evolution catalyst. A record photocurrent density of -9.8 mA cm(-2) at 0 V versus RHE with an onset potential as positive as 0.95±0.03 V versus RHE is obtained. The photoelectrodes show remarkable stability retaining more than 80% of their initial photocurrent for ∼1 h under continuous illumination.
The research leading to these results has received funding from the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme FP7-PEOPLE-2013-IEF under REA Grant Agreement No. (623061; M.C-Q.). This work was also supported by the Christian Doppler Research Association (Austrian Federal Ministry of Science, Research and Economy and the National Foundation for Research, Technology and Development) and the OMV Group (J.W., M.F.K. and E.R.); L.M.P.-O. would like to thank the Engineering and Physical Sciences Research Council of the UK (EPSRC), the Cambridge Home European Scholarship Scheme (CHESS) and King Abdulaziz City for Science and Technology (KACST).
European Commission (623061)
External DOI: https://doi.org/10.1038/ncomms12555
This record's URL: https://www.repository.cam.ac.uk/handle/1810/256973
Attribution 4.0 International
Licence URL: http://creativecommons.org/licenses/by/4.0/