Highly Efficient Capillary Photoelectrochemical Water Splitting Using Cellulose Nanofiber‐Templated TiO₂ Photoanodes

A capillary photoelectrochemical (PEC) system is developed using cellulose-nanofiber (CNF)-templated TiO2 nanostructures to perform water splitting reactions outside of the electrolyte body, where the electrolyte is supplied through capillary force-driven nano/micro-channels in the CNF film. Enhanced reaction kinetics and higher efficiencies are observed in the capillary PEC process compared with conventional in-electrolyte PEC setups. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.