Dual Modification Strategy: Passivation Layer and Cocatalyst on Hematite for Improved Photoelectrochemical Water Oxidation
Source abstract
Abstract
α-Fe 2 O 3 is a very attractive photoanode for photoelectrochemical (PEC) water decomposition. However, its short diffusion length, poor conductivity, and fast charge-carrier recombination severely limit device efficiency. Here, coloading an Al 2 O 3 passivation layer and a CoO x cocatalyst onto Ti-doped α-Fe 2 O 3 was carried out to promote PEC water oxidation by improving charge separation and transfer at the electrode/electrolyte interface and inhibiting photocarrier recombination. The optimized Ti:Fe 2 O 3 /Al 2 O 3 /CoO x photoanode shows a large photocurrent density of 1.41 mA cm –2 at 1.23 V vs reversible hydrogen electrode, which is 47 times greater than that of a pristine Ti:Fe 2 O 3 photoanode. The dual modifications with a combined passivation layer and cocatalyst on the photoanode verify a valuable way for solar energy conversion in PEC water oxidation.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Iron oxide chemistry and applications · Advanced Photocatalysis Techniques · Mine drainage and remediation techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China
Funding
Natural Science Foundation of Heilongjiang Province · Graduate Innovation Project of Harbin Normal University
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