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\bibitem{VanHal_etal2021} {\textquotedblleft}\textit{Gas phase photofuel cell consisting of WO$_{3}$- and TiO$_{2}$-photoanodes and an air-exposed cathode for simultaneous air purification and electricity generation}{\textquotedblright}. Van Hal M, Campos R, Lenaerts S, De Wael K, Verbruggen SW, Applied Catalysis B-Environmental \textbf{292}, 120204 (2021).   http://doi.org/10.1016/J.APCATB.2021.120204

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