Ti doped α-Fe2O3 electrodes for water oxidation
Source abstract
Abstract
Development of low-cost electrocatalysts is a challenging task and has been the focus in the field of advanced water oxidation in comparison to ruthenium and iridium oxide-based electrodes. The current research focused on Ti doped α-Fe 2O 3 electrodes for water oxidation. The water oxidation rate initially enhanced and then decreased as Ti doping levels increase. The enhanced activity can be ascribed to the increased surface area and charge transfer rate constant k ct. The increase in k ct results from a greater potential drop on the Helmholtz layer, which is mainly attributed to an increased surface state density. The decreased performance for the electrodes with high Ti levels is due to the formation of a TiO 2-Fe 2O 3 mixture where TiO 2 shows poor activity. Moreover, the mechanism of charge transfer is discussed. This study may provide an alternative hematite semiconductor anode for water dark oxidation, environmental pollution control, and may even be helpful for better understanding the photoelectrochemical oxidation of water under the weak light illumination and high bias potential.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Iron oxide chemistry and applications · Advanced Photocatalysis Techniques · Copper-based nanomaterials and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (54)
Show source-provided references
1. Energy, environment and sustainable development10.1016/j.rser.2007.05.001 ↗
2. Decoupled electrochemical water-splitting systems: a review and perspective10.1039/D1EE01226F ↗
3. Emerging polymeric carbon nitride Z-scheme systems for photocatalysis
4. Emerging frontiers of Z-scheme photocatalytic systems10.1016/j.trechm.2021.11.005 ↗
5. Earth-abundant catalysts for electrochemical and photoelectrochemical water splitting10.1038/s41570-016-0003 ↗
6. Improved oxygen evolution activity of IrO2 by in situ engineering of an ultra-small Ir sphere shell utilizing a pulsed laser10.1039/C8NR10163A ↗
7. Robust interfacial Ru-RuO2 heterostructures for highly efficient and ultrastable oxygen evolution reaction and overall water splitting in acidic media10.1016/j.jallcom.2022.163787 ↗
8. Enhanced overall water-splitting performance: oleylamine-functionalized GO/Cu2ZnSnS4 composite as a nobel metal-free and nonprecious electrocatalyst10.1021/acsomega.9b01680 ↗
9. Recent advances in cobalt-based electrocatalysts for hydrogen and oxygen evolution reactions10.1016/j.jallcom.2019.153542 ↗
10. Recent advances in nanostructured electrocatalysts for hydrogen evolution reaction10.1007/s12598-021-01735-y ↗
11. Hierarchical sulphide - phosphide NiSP /NF catalyst prepared by gradient electrodeposition for oxygen evolution reaction10.1016/j.jallcom.2021.162675 ↗
12. State-of-the-art advancements of transition metal oxides as photoelectrode materials for solar water splitting10.1007/s12598-022-01968-5 ↗
13. Transition metal-based electrocatalysts for overall water splitting10.1016/j.cclet.2021.01.047 ↗
14. Recent advances in transition metal selenides-based electrocatalysts: Rational design and applications in water splitting10.1016/j.jallcom.2022.165719 ↗
15. Doping in semiconductor oxides-based electron transport materials for perovskite solar cells application10.1002/solr.202000605 ↗
16. Tuning La2O3 to high ionic conductivity by Ni-doping10.1039/D1CC07183A ↗
17. Efficient BiVO4 thin film photoanodes modified with cobalt phosphate catalyst and W-doping10.1002/cctc.201200472 ↗
18. Water oxidation catalysis: electrocatalytic response to metal stoichiometry in amorphous metal oxide films containing iron, cobalt, and nickel10.1021/ja403102j ↗
19. Sulfate-assisted interfacial engineering for high yield and efficiency of triple cation perovskite solar cells with alkali-doped TiO2 electron-transporting layers10.1002/adfm.201706287 ↗
20. Low temperature processed ZnO thin film as electron transport layer for efficient perovskite solar cells10.1016/j.solmat.2016.09.014 ↗
21. In-situ construction of photoanode with Fe2O3/Fe3O4 heterojunction nanotube array to facilitate charge separation for efficient water splitting10.1016/j.jallcom.2022.165787 ↗
22. Fabrication of γ-Fe2O3 nanowires from abundant and low-cost fe plate for highly effective electrocatalytic water splitting10.1038/s41598-020-62259-6 ↗
23. Increased active sites on irregular morphological α-Fe2O3 nanorods for enhanced photoelectrochemical performance10.1021/acsomega.0c01072 ↗
24. Activating hematite nanoplates via partial reduction for electrocatalytic oxygen reduction reaction10.1021/acssuschemeng.9b02352 ↗
25. Catalytic ozonation by Si-doped α-Fe2O3 for the removal of nitrobenzene in aqueous solution10.1016/j.seppur.2019.115766 ↗
26. Influence of Ti doping levels on the photoelectrochemical properties of thin-film hematite (α-Fe2O3) photoanodes10.1021/acs.jpcc.7b00442 ↗
27. Sn Doping into Hematite Nanorods for High-Performance Photoelectrochemical Water Splitting10.1149/2.0621914jes ↗
28. Tuning of oxygen vacancy-induced electrical conductivity in Ti-doped hematite films and its impact on photoelectrochemical water splitting10.1038/s41598-020-64231-w ↗
29. 3D ordered urchin-like TiO2@Fe2O3 arrays photoanode for efficient photoelectrochemical water splitting10.1016/j.apsusc.2018.11.184 ↗
30. Gradient doping – a case study with Ti-Fe2O3 towards an improved photoelectrochemical response10.1039/C6CP05515J ↗
31. Doping of Ni in α-Fe2O3 nanoclews to boost oxygen evolution electrocatalysis
32. Nanostructured Ti-doped hematite (α-Fe2O3) photoanodes for efficient photoelectrochemical water oxidation10.1016/j.ijhydene.2013.10.031 ↗
33. Facile synthesis of highly photoactive α-Fe2O3-based films for water oxidation10.1021/nl202316j ↗
34. Regenerated dye-sensitized photocatalytic oxidation of arsenite over nanostructured TiO2 films under visible light in normal aqueous solutions: an insight into the mechanism by simultaneous (photo)electrochemical measurements10.1021/jp308920u ↗
35. New benchmark for water photooxidation by nanostructured α-Fe2O3 films10.1021/ja064380l ↗
36. Best practices for reporting electrocatalytic performance of nanomaterials10.1021/acsnano.8b07700 ↗
37. Understanding the enhanced photoelectrochemical water oxidation over Ti-doped α-Fe2O3 electrodes by electrochemical reduction pretreatment10.1039/C9CP06138J ↗
38. Optical and photocatalytic properties of the Fe-doped TiO2 nanoparticles loaded on the activated carbon10.1016/j.apt.2018.04.026 ↗
39. Enhanced photoelectrochemical properties of Fe-TiO2 nanotube films: a combined experimental and theoretical study10.20964/2021.06.65 ↗
40. Substrate dependent water splitting with ultrathin α-Fe2O3 electrodes10.1021/jp4116657 ↗
41. Raman spectroscopic study of TiO2 nanoparticles’ effects on the hemoglobin state in individual red blood cells10.3390/ma14205920 ↗
42. Photoelectrochemical properties of Ni-doped Fe2O3 thin films prepared by electrodeposition10.1016/j.electacta.2011.10.051 ↗
43. X-ray photoelectron spectroscopy analysis of nitrogen-doped tio2 films prepared by reactive-ion-beam sputtering with various NH3/O2 gas mixture ratios10.3390/coatings10010047 ↗
44. A transparent Ti4+ doped hematite photoanode protectively grown by a facile hydrothermal method10.1039/c3ce26811j ↗
45. Electro-oxidation of water on hematite: Effects of surface termination and oxygen vacancies investigated by first-principles10.1016/j.susc.2015.03.022 ↗
46. Interface engineering of Ni3Fe and FeV2O4 coupling with carbon-coated mesoporous nanosheets for boosting overall water splitting at 1500 mA·cm–210.1021/acssuschemeng.1c02293 ↗
47. Surface state assisted electron tunneling through a space charge layer10.1016/0022-0728(91)85398-9 ↗
48. Photoelectrochemical Studies of Oriented Nanorod Thin Films of Hematite10.1149/1.1393553 ↗
49. Analysis of the impedance response due to surface states at the semiconductor/solution interface10.1063/1.367191 ↗
50. Influence of feature size, film thickness, and silicon doping on the performance of nanostructured hematite photoanodes for solar water splitting10.1021/jp809060p ↗
51. Limitation of Fermi level shifts by polaron defect states in hematite photoelectrodes10.1038/s41467-018-06838-2 ↗
52. Water oxidation at hematite photoelectrodes: the role of surface states10.1021/ja210755h ↗
53. The concept of Fermi level pinning at semiconductor/liquid junctions. Consequences for energy conversion efficiency and selection of useful solution redox couples in solar devices10.1021/ja00531a001 ↗
54. Toward solar fuels: water splitting with sunlight and “rust”?10.1016/j.ccr.2012.06.017 ↗