Iron Oxide Films Prepared by Rapid Thermal Processing for Solar Energy Conversion
Artikel i vetenskaplig tidskrift, 2017

Hematite is a promising and extensively investigated material for various photoelectrochemical (PEC) processes for energy conversion and storage, in particular for oxidation reactions. Thermal treatments during synthesis of hematite are found to affect the performance of hematite electrodes considerably. Herein, we present hematite thin films fabricated via one-step oxidation of Fe by rapid thermal processing (RTP). In particular, we investigate the effect of oxidation temperature on the PEC properties of hematite. Films prepared at 750 degrees C show the highest activity towards water oxidation. These films show the largest average grain size and the highest charge carrier density, as determined from electron microscopy and impedance spectroscopy analysis. We believe that the fast processing enabled by RTP makes this technique a preferred method for investigation of novel materials and architectures, potentially also on nanostructured electrodes, where retaining high surface area is crucial to maximize performance.

Författare

Björn Wickman

Kompetenscentrum katalys (KCK)

Chalmers, Fysik, Kemisk fysik

A. B. Fanta

Danmarks Tekniske Universitet (DTU)

A. Burrows

Danmarks Tekniske Universitet (DTU)

Anders Hellman

Kompetenscentrum katalys (KCK)

Chalmers, Fysik, Kemisk fysik

Jakob B. Wagner

Danmarks Tekniske Universitet (DTU)

Beniamino Iandolo

Chalmers, Mikroteknologi och nanovetenskap (MC2)

Chalmers, Fysik, Kemisk fysik

Scientific Reports

2045-2322 (ISSN)

Vol. 7 40500

Fundament

Grundläggande vetenskaper

Ämneskategorier

Kemiteknik

DOI

10.1038/srep40500

Mer information

Senast uppdaterat

2018-02-28