Abstract
The development of multifunctional electrocatalytic materials for energy storage, conversion and electrochemical sensing with the characteristics of low cost, high catalytic activity, and high stability has far-reaching significance. In recent years, Schiff base complexes have become the preferred materials for electrochemical research interests because of their special structure and the multiple active sites on the surface. However, there are few studies on Schiff base catalysts for the multifunctional application, especially in electrochemical detection. In this paper, cobalt Schiff base complex was synthesized by solution precipitation method and then was phosphorized to obtain the multifunctional catalyst denoted as CoPO–CN. The electrocatalytic activity was measured in the presence and absence of urea alkaline solution, and the results showed that the onset potential for urea oxidation reaction (UOR) and oxygen evolution reaction (OER) were 1.35 and 1.52 V versus reversible hydrogen electrode (vs. RHE), respectively. The electrochemical sensing performance for ascorbic acid (AA) indicated that the detection sensitivity was 217.2 μA mM–1 cm–2, and the detection limit was 3.84 μM. Our work creatively used the phosphorized cobalt Schiff base for multifunctional application, not only providing new insights for the multifunctional application of Schiff base catalyst in energy conversion, but also pointing a new method for detecting small biomolecules, especially ascorbic acid.
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Co-first authors: Yang Hu and Qingcui Liu contribute to this work equally.
Authors Banghua Peng and Feng Yu proposed the experimental approach; authors Yang Hu and Qingcui Liu carried out synthesis of samples and the electrochemical study; authors Yang Hu and Haoyi Ren performed XPS analysis, TEM analysis and XRD techniques; author Jianglian Deng participated in data treatment; authors Wenju Liang, Peiyuan Shao and Zhiyong Liu took part in preparation of the manuscript; all authors participated in discussion of results.
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This work was supported by the National Natural Science Foundation of China (21663023), the Double First Class General Science and Technology Projects from School of Chemistry and Chemical Engineering, Shihezi University (SHYL-YB201903), and the Undergraduate Research and Training Program, Shihezi University (SRP2020274).
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Yang Hu, Liu, Q., Ren, H. et al. Schiff Base Derived CoPO–CN for Electrocatalytic Oxygen Evolution, Urea Oxidation and Ascorbic Acid Sensing. Russ J Electrochem 59, 92–103 (2023). https://doi.org/10.1134/S1023193523010044
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DOI: https://doi.org/10.1134/S1023193523010044