F. I. Espinosa?Lagunes, J. C. Cruz, R. E. Vega?Azamar, I. Murillo?Borbonio, Julieta Torres?González, Ricardo A. Escalona?Villalpando, M. P. Gurrola, J. Ledesma?García, L. G. Arriaga,
2022
Revistas indexadas
Copper nanoparticles suitable for bifunctional cholesterol oxidation reaction: harvesting energy and sensor
2022
FISICA
FISICOQUIMICA
ELECTROQUIMICA
This study reports the performance of simple low-cost synthesized bifunctional Cu/Cu2O nanoparticles (NPs) used as a catalyst for energy-harvesting applications through of a microfluidic fuel cell (?FC), and further, as cholesterol (Chol) sensor. TEM characterization of the NPs showed spheres between 4 and 10 nm, while XRD and XPS analysis confirmed the composition and preferential crystallographic plane of Cu/Cu2O. In addition, 25.26 m2 g? 1 surface area was obtained, which is greater than those commercial materials. NPs showed high activity toward the cholesterol oxidation reaction when were used as a sensor, obtaining a linear interval between 0.5 and 1 mM and 850 ?A mM? 1 mg? 1 of sensitivity and 8.9 ?M limit of quantification LOQ. These values are comparable to results previously reported. Moreover, Cu/Cu2O NPs were used as anode in a ?FC with 0.96 V of cell voltage and 6.5 mA cm? 2 and 1.03 mW cm? 2 of current and power density, respectively. This performance is the highest currently reported for cholesterol application as an alternative fuel, and the first one reported for a microfluidic fuel cell system as far as is known. Results showed that the obtained Cu-based NPs presented an excellent performance for the dual application both ?FC and sensor, which has potential applications in biomedicine and as an alternative energy source.
Sistema Estatal de Información y Documentación Científica y Tecnológica
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