Iron Oxide Films Prepared by Rapid Thermal Processing for Solar Energy Conversion
Journal article, 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.

Author

Björn Wickman

Competence Centre for Catalysis (KCK)

Chalmers, Physics, Chemical Physics

A. B. Fanta

Technical University of Denmark (DTU)

A. Burrows

Technical University of Denmark (DTU)

Anders Hellman

Competence Centre for Catalysis (KCK)

Chalmers, Physics, Chemical Physics

Jakob B. Wagner

Technical University of Denmark (DTU)

Beniamino Iandolo

Chalmers, Physics, Chemical Physics

Chalmers, Microtechnology and Nanoscience (MC2)

Scientific Reports

2045-2322 (ISSN)

Vol. 7 40500

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (SO 2010-2017, EI 2018-)

Energy

Materials Science

Roots

Basic sciences

Subject Categories

Chemical Engineering

Infrastructure

Chalmers Materials Analysis Laboratory

Nanofabrication Laboratory

DOI

10.1038/srep40500

More information

Latest update

7/27/2020