Hollow structured Co3O4/CuO nanocomposite as an efficient electrocatalyst for methanol oxidation reaction
Source abstract
Abstract
In this work, a series of Co 3O 4/CuO nanocomposites with different component ratios are successfully synthesized by simple and economical hydrothermal and calcination methods, using nickel foam as the substrate. The catalytic performances of nickel foam supported Co 3O 4/CuO nanocomposites for methanol oxidation reaction (MOR) are evaluated. TEM characterization shows that the Co 3O 4/CuO nanocomposites have a hollow framework structure. The electrocatalytic test results prove the catalytic performance of the Co 3O 4/CuO nanocomposites is observably better than that of Co 3O 4 and CuO. Among the Co 3O 4/CuO nanocomposites, the CoCu-5 with a CuO content of 49.76 % has the highest catalytic activity and good stability. The current density value of CoCu-5 can reach 193.8 mA mg −1 at 0.6 V (vs Ag/AgCl), and the current density retention ratio is 93.8 % after 1000 CV cycles of testing. The excellent electrocatalytic performance of the Co 3O 4/CuO nanocomposites can be due to the synergistic effect between Co 3O 4 and CuO, and the large number of catalytic active sites brought about by the unique hollow frame structure.
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Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Catalytic Processes in Materials Science · Electrochemical Analysis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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