Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 315, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121526
Keywords
Ti:Fe2O3 photoanode; Surface states; Conductive MOFs; OER
Funding
- National Natural Science Foundation of China-NSFC [22008059, 21725602, 21938002, 21671062, 21776064]
- Innovative Research Groups of Hunan Province, China [2019JJ10001]
- Science and Technology Planning Project of Hunan Province, China [CX20200444]
- Hunan Provincial Innovation Foundation for Postgraduate, China [CX20200444]
- Innovation Platform and Talent Plan of Science and Technology Department of Hunan Province - Provincial Science and Technology Leading Talent Project, China ( [CX20200444]
- [2019RS3010]
Ask authors/readers for more resources
A conductive MOFs (cMOFs) overlayer based on 2,5-dihydroxybenzoquinone was conformally coated on Ti:Fe2O3 using caffeic acid as coordination agent, resulting in enhanced photoelectrochemical water oxidation activity and stability. Coordination of catechol with Ti:Fe2O3 bridges the two materials and regulates the surface state of Ti:Fe2O3, increasing its capacity for holes storage.
The ability of hematite (alpha-Fe2O3) for photoelectrochemical water oxidation is limited by its poor conductivity. The construction of core-shell photoanode with a cocatalyst overlayer of metal-organic frameworks (MOFs) has been recognized as an effective method to enhance activity and stability. However, most MOFs cocatalysts are insulators, charge conductivity of MOFs and surface state of alpha-Fe2O3 synchronously modulation are needed for efficient carrier migration. In this study, a conductive MOFs (cMOFs) overlayer based on 2,5-dihydroxybenzoquinone was conformally coated on Ti:Fe2O3 using caffeic acid as coordination agent. The catechol groups in caffeic acid not only bridges Ti:Fe(2)O(3 )with cMOFs, but also regulates the surface state of Ti:Fe2O3. Coordination of catechol with Ti:Fe2O3 results in shortening of Fe-O bond and generation of surface state of high energy, thereby increasing its capacity for holes storage. The synthesized Ti:Fe2O3@CoFe-cMOFs exhibits outstanding photo current density of 3.3 mA cm(-2) with high stability.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available