Affiliation:
1. College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China
2. Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China
Abstract
AbstractHematite is considered a promising photoanode material for solar water splitting; however, its photoelectrochemical (PEC) water splitting performance is limited by a high‐density surface state. In this study, we achieved passivation of a hematite surface using In2O3 nanoparticles. We characterized the passivation effect by analyzing the Mott‐Schottky curves. The resulting compound exhibited a negative shift of 0.1 eV in the onset potential compared to pure hematite, strongly indicating that the defect surface state of hematite was effectively passivated. Furthermore, the addition of NiFe(OH)x as a cocatalyst enhanced the oxygen evolution reaction kinetics. The optimal Ti−Fe2O3/In2O3/NiFe(OH)x compound photoanode achieved a superior photocurrent density of 2.6 mA cm−2 at 1.23 V vs. RHE, which is more than six times that of pure hematite (0.41 mA cm−2). This finding highlights a potential avenue for overcoming the issue of a high surface‐state density as the limiting condition for photoelectrodes.
Funder
Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering
Subject
Organic Chemistry,Physical and Theoretical Chemistry,Analytical Chemistry
Cited by
3 articles.
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