Photo-Electrochemical Oxygen Evolution Reaction by Biomimetic CaMn2O4 Catalyst
Source abstract
Abstract
Calcium manganese oxide catalysts are a new class of redox catalysts with significant importance because of their structural similarity to natural oxygen-evolving complex in plant cells and the earth-abundant elemental constituents. In the present study, the photo-electrocatalytic properties of CaMn2O4 in water-splitting were investigated. CaMn2O4 powders with irregular shapes and nanowire shapes were synthesised using mechanochemical processing and a hydrothermal method, respectively. The anode in a photo-electrochemical cell was fabricated by embedding CaMn2O4 powders within polypyrrole. The results showed that CaMn2O4 induced a higher dark and light current in comparison to the control sample (polypyrrole alone). CaMn2O4 nanowires exhibited higher dark and light current in comparison to irregular-shaped CaMn2O4 powders. The difference was attributable to the higher surface area of nanowires compared to the irregular-shaped particles, rather than the difference in exposed crystal facets.
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Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Electrochemical Analysis and Applications · Copper-based nanomaterials and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Research School of Electrical Energy and Materials Engineering, The Australian National University, Canberra, ACT 2601, Australia
Intelligent Polymer Research Institute, University of Wollongong, Wollongong, NSW 2522, Australia
ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW 2522, Australia
Department of Science, College of Basic Education, University of Mosul, Mosul 41002, Iraq
References (17)
Show source-provided references
1. Towards highly efficient photoanodes: boosting sunlight-driven semiconductor nanomaterials for water oxidation10.1039/c4nr01181c ↗
2. Synthesis of Ca2Mn3O8 films and their electrochemical studies for the oxygen evolution reaction (OER) of water10.1016/j.nanoen.2011.10.003 ↗
3. Calcium manganese (IV) oxides: biomimetic and efficient catalysts for water oxidation10.1039/c2dt12189a ↗
4. Calcium-manganese oxides as structural and functional models for active site in oxygen evolving complex in photosystem II: Lessons from simple models10.1016/j.jphotobiol.2010.12.009 ↗
5. Amorphous Manganese-Calcium Oxides as a Possible Evolutionary Origin for the CaMn4 Cluster in Photosystem II10.1007/s11084-010-9224-z ↗
6. Calcium manganese oxides as biomimetic catalysts in energy applications: A short review10.1016/j.ces.2018.06.059 ↗
7. Porous calcium-manganese oxide microspheres for electrocatalytic oxygen reduction with high activity10.1039/C2SC21475J ↗
8. Facile solvothermal synthesis of CaMn2O4 nanorods for electrochemical oxygen reduction10.1039/c2jm32564k ↗
9. Calcium Manganese (III) Oxides (CaMn2O4⋅x H2O) as Biomimetic Oxygen-Evolving Catalysts10.1002/anie.200906745 ↗
10. Synergetic photoelectrocatalytic reactors for environmental remediation: A review10.1016/j.jphotochemrev.2015.07.003 ↗
11. ZnO nanostructures with different morphology for enhanced photocatalytic activity10.1088/2053-1591/aa9d5d ↗
12. Dehydration of crystalline MnSO4·4H2O10.1016/0040-6031(87)88312-0 ↗
13. Synthesis of CaCO3 nanoparticles by mechanochemical processing10.1023/A:1010051506232 ↗
14. Étude structurale de l’oxyde double de manganése et de calcium orthorhombique CaMn2O4 (marokite)
15. The effect of acid/alkali treatment on the catalytic combustion activity of manganese oxideoctahedral molecular sieves
16. Percolation in suspensions of hard nanoparticles: From spheres to needles10.1209/0295-5075/111/56004 ↗
17. Synergistic Amplification of Water Oxidation Catalysis on Pt by a Thin-Film Conducting Polymer Composite10.1021/acsaem.8b00728 ↗