Issue 48, 2016

A selectively decorated Ti-FeOOH co-catalyst for a highly efficient porous hematite-based water splitting system

Abstract

We report an efficient Ti-doped FeOOH (Ti-FeOOH) co-catalyst applied on SiOx thin layer coated Ti-doped porous Fe2O3 (Ti-PH) to realize an excellent water splitting photoelectrochemical cell. The SiOx thin layer coated on Ti-doped porous hematite induces preferential deposition of the Ti-FeOOH co-catalyst on the inner pores of Ti-PH, which enhances oxygen evolution reaction performance without interrupting the absorption of light by hematite. The photocurrent density of Ti-FeOOH/Ti-PH is 4.06 mA cm−2 at 1.23 V vs. RHE, 3.4 times higher than that of conventional worm-like hematite, with excellent long-term stability for 36 h. This represents the state-of-the-art performance among hematite-based systems with the exception of very few studies that used precious materials. Importantly, the proposed photoanode can be fabricated by a simple and cost-efficient solution-based method, i.e. with cheap precursors and without any specific equipment.

Graphical abstract: A selectively decorated Ti-FeOOH co-catalyst for a highly efficient porous hematite-based water splitting system

Supplementary files

Article information

Article type
Communication
Submitted
23 Sep 2016
Accepted
12 Nov 2016
First published
14 Nov 2016

J. Mater. Chem. A, 2016,4, 18730-18736

A selectively decorated Ti-FeOOH co-catalyst for a highly efficient porous hematite-based water splitting system

K. Yoon, H. Ahn, M. Kwak, Sun-I. Kim, J. Park and J. Jang, J. Mater. Chem. A, 2016, 4, 18730 DOI: 10.1039/C6TA08273D

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