From Extended Nanofluidics to an Autonomous Solar-Light-Driven Micro Fuel-Cell Device

Yuriy Pihosh, Jin Uemura, Ivan Turkevych, Kazuma Mawatari, Yutaka Kazoe, Adelina Smirnova, Takehiko Kitamori

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Autonomous micro/nano mechanical, chemical, and biomedical sensors require persistent power sources scaled to their size. Realization of autonomous micro-power sources is a challenging task, as it requires combination of wireless energy supply, conversion, storage, and delivery to the sensor. Herein, we realized a solar-light-driven power source that consists of a micro fuel cell (μFC) and a photocatalytic micro fuel generator (μFG) integrated on a single microfluidic chip. The μFG produces hydrogen by photocatalytic water splitting under solar light. The hydrogen fuel is then consumed by the μFC to generate electricity. Importantly, the by-product water returns back to the photocatalytic μFG via recirculation loop without losses. Both devices rely on novel phenomena in extended-nano-fluidic channels that ensure ultra-fast proton transport. As a proof of concept, we demonstrate that μFG/μFC source achieves remarkable energy density of ca. 17.2 mWh cm−2 at room temperature.

Original languageEnglish
Pages (from-to)8130-8133
Number of pages4
JournalAngewandte Chemie - International Edition
Volume56
Issue number28
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

Keywords

  • fuel cells
  • hydrogen production
  • nanofluidics
  • photocatalysis
  • water splitting

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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