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Effect of Copper Cobalt Oxide Composition on Oxygen Evolution Electrocatalysts for Anion Exchange Membrane Water Electrolysis. | LitMetric

AI Article Synopsis

  • Copper cobalt oxide nanoparticles (CCO NPs) were created using a co-precipitation method, with three different copper to cobalt ratios (1:1, 1:2, 1:3) to see how these changes affect their properties.
  • The study revealed that the right composition and oxidation steps greatly improved the nanoparticles' structure and efficiency, leading to high electrocatalytic performance due to optimal Co sites for oxygen evolution.
  • The CCO NPs were successfully used in practical applications, particularly in a water electrolyzer system, achieving stable hydrogen production for 100 hours with more than 71% efficiency.

Article Abstract

Copper cobalt oxide nanoparticles (CCO NPs) were synthesized as an oxygen evolution electrocatalyst a simple co-precipitation method, with the composition being controlled by altering the precursor ratio to 1:1, 1:2, and 1:3 (Cu:Co) to investigate the effects of composition changes. The effect of the ratio of Cu/Co and the degree of oxidation during the co-precipitation and annealing steps on the crystal structure, morphology, and electrocatalytic properties of the produced CCO NPs were studied. The CCO electrode exhibited an outstanding performance and high stability owing to the suitable electrochemical kinetics, which was provided by the presence of sufficient Co as active sites for oxygen evolution and the uniform sizes of the NPs in the half cell. Furthermore, single cell tests were performed to confirm the possibility of using the synthesized electrocatalyst in a practical water splitting system. The CCO electrocatalyst was used as an anode to develop an anion exchange membrane water electrolyzer (AEMWE) cell. The full cell showed stable hydrogen production for 100 h with an energetic efficiency of >71%. In addition, it was possible to mass produce the uniform, highly active electrocatalyst for such applications through the co-precipitation method.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7741587PMC
http://dx.doi.org/10.3389/fchem.2020.600908DOI Listing

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