In electrochemistry, many applications such as (photo-)electrocatalysis can be expected to have an increased performance with an increased exposed surface area of the active material to a (photo-)electrochemical cell. We show, that vertically aligned and spaced out MWCNTs may serve as a support for photoelectrocatalytic materials. The high aspect ratio of the proposed vertically aligned nanocomposite structures may assist to overcome the limitations arising from the competition between light absorption for charge carrier generation, and the charge carrier recombination due to the material’s charge carrier diffusion length.1 This concept is demonstrated at hand of the MWCNT@BiVO4 system for water solar splitting.

© 2017 Optical Society of America

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