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dc.contributor.authorHe, J.
dc.contributor.authorZhou, W.
dc.contributor.authorSunarso, J.
dc.contributor.authorXu, Xiaomin
dc.contributor.authorZhong, Yijun
dc.contributor.authorShao, Zongping
dc.contributor.authorChen, X.
dc.contributor.authorZhu, H.
dc.identifier.citationHe, J. and Zhou, W. and Sunarso, J. and Xu, X. and Zhong, Y. and Shao, Z. and Chen, X. et al. 2018. 3D ordered macroporous SmCoO3 perovskite for highly active and selective hydrogen peroxide detection. Electrochimica Acta. 260: pp. 372-383.

© 2017 Elsevier Ltd. We reported the direct electrochemical hydrogen peroxide detection on three-dimensionally ordered macroporous SmCoO 3 (3DOM-SmCoO 3 ) perovskite oxide electrode synthesized via a poly (methyl methacrylate) (PMMA) colloidal crystal templating route. The low-cost and simple 3DOM-SmCoO 3 sensor not only overcome the various disadvantages of enzyme- and noble metal-based sensors but also display a superior sensing performance for H 2 O 2 detection. More importantly, using 800 nm PMMA microspheres, a hexagonally ordered macroporous crystalline structure can be created, which features large surface area (20.14 m 2 g -1 ) and large, open, interconnected channels for facile reactants and ions diffusions. The resultant 3DOM-SmCoO 3 synthesized using 800 nm PMMA microspheres template (3D-SC-800) displayed higher sensitivity (715 and 460 µA mM -1 cm -2 ), lower limit of detection (0.004 µM), larger detection linear range (0.1–10,000 µM), and higher selectivity in the presence of interfering species (i.e., glucose, ascorbic acid, dopamine, and uric acid), for H 2 O 2 detection, relative to SmCoO 3 (SC) and SmCoO 3 synthesized using 200 nm PMMA template (3D-SC-200). Our comprehensive electrochemical characterization attributes the superior H 2 O 2 electrooxidation performance of 3D-SC-800 to its fast electron transfer kinetics and diffusion rate. What we demonstrated here bolsters the future opportunity to harness ordered macroporous perovskite oxide-based materials for highly active and selective non-enzymatic H 2 O 2 detection.

dc.title3D ordered macroporous SmCoO3 perovskite for highly active and selective hydrogen peroxide detection
dc.typeJournal Article
dcterms.source.titleElectrochimica Acta
curtin.departmentWASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
curtin.accessStatusFulltext not available

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