Metal Oxide Materials
We are interested on synthesis of oxides and hydroxides of metals by simple approach capable of specific thick, structures, phases, and compositions. We have developed simple redox-mediated synthesis with the examples of cobalt and manganese oxide materials in forms of nanostructured particles and thin films. This aqueous redox-assisted metal oxide preparation (ARMOP) features very simple operation for multi-metal oxide nanomaterials in diverse material growth and deposition conditions, and yields the products with homogeneous elemental distribution, low resistivity, and high catalytic reactivities.
Fig. 1 SEM picture of CMOH nanoparticle synthesis through hydrothermal reaction. [1]
Fig. 2 Simple redox protocol to synthesis CMOH thin film on FTO substrate. [2]
Fig. 3. The versatility of coating CMOH on various substrates (i) the Ni foam with the CMOH coating as compared to the bare one showing the dimensionality of the coating; (ii) crew pairs with homogeneous coating all throughout; (iii) the 100 cm2 glass substrate showing the deposition of the intricate design pattern; (iv) coating on PET shows no appreciable cracking under bending and folding for 100 cycles; (v) wooden surface coated with CMOH; (vi) metallic surface (Cu film) coated with CMOH.[2]
Fig. 4. Cross-sectional SEM with EDX mapping showing the regions of Co and Mn in the CMOH film. This shows the even distribution of the metals through the deposition method. [2]
References/Related Works
[1] Lan, W.-J.; Kuo, C.-C.; Chen, C.-H.* Hierarchical Nanostructures with Unique Y-shaped Interconnection Networks in Manganese Substituted Cobalt Oxides: The Enhancement Effect on Electrochemical Sensing Performance. Chem. Commun. 49, 3025 (2013)
[2] Jhang, R.-H.; Yang, C.-Y.; Shih, M.-C.; Ho, J.-Q.; Tsai, Y.-T. ; Chen, C.-H.* Redox-assisted Multicomponent Deposition of Ultrathin Amorphous Metal Oxides on Arbitrary Substrates: Highly Durable Cobalt Manganese Oxyhydroxide for Efficient Oxygen Evolution. J. Mater. Chem. A. 6, 17915 (2018)
[3] Kuo, C.-C.; Lan, W.-J.; Chen, C.-H.* Redox Preparation of Mixed-]Valence Cobalt Manganese Oxide Nanostructured Materials: Highly Efficient Noble Metal-Free Electrocatalysts for Sensing Hydrogen Peroxide. Nanoscale 6, 334 (2014)