A Flexible Electrode Based on Iron Phosphide Nanotubes for Overall Water Splitting

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Abstract
The design of cheap and efficient water splitting systems for sustainable hydrogen production has attracted increasing attention. A flexible electrode, based on carbon cloth substrate and iron phosphide nanotubes coated with an iron oxide/phosphate layer, is shown to catalyze overall water splitting. The as‐prepared flexible electrode demonstrates remarkable electrocatalytic activity for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) at modest overpotentials. The surface iron oxide/phosphate, which is formed in situ, is proposed to improve the HER activity by facilitating the water‐dissociation step and serves directly as the catalytically‐active component for the OER process.
Funding Information
  • National Research Foundation (NRF), Prime Minister’s Office, Singapore
  • Academic Research Fund (M4011253 RG7/14, M4020246 ARC10/15)
  • Ministry of Education, Singapore

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