“…Cu 2 O is an environmentally friendly semiconductor which has attracted intense attention as a promising candidate for electrochemical sensors, owing to its low cost and excellent catalytic activity [372,373]. Unsupported Cu 2 O heterogeneous catalysts are recorded to be very active oxidation catalysts, but are thermally unstable at evaluating temperatures [372].…”
Section: Cu 2 O/graphene Heterogenous Catalystmentioning
“…Cu 2 O is an environmentally friendly semiconductor which has attracted intense attention as a promising candidate for electrochemical sensors, owing to its low cost and excellent catalytic activity [372,373]. Unsupported Cu 2 O heterogeneous catalysts are recorded to be very active oxidation catalysts, but are thermally unstable at evaluating temperatures [372].…”
Section: Cu 2 O/graphene Heterogenous Catalystmentioning
“…Figure 3 shows the amperometric current curves of the Au/Cu 2 O/GCE with the successive addition of 0.1 mM H 2 O 2 into 0.1 M PBS (pH = 7.0) at different potentials from −0.15 to −0.35 V. It is found that the current response of −0.15, −0.20, and −0.25 V are lower than that of −0.30 and −0.35 V. Compared with the potential of −0.30 V, the response current of −0.35 V is less stable and has larger background noise. In addition, some interfering species which are stable under relatively low potential would be oxidized at high potential [33]. Thus, −0.30 V was chosen as the working potential for the detection of H 2 O 2 .Fig.…”
Au/Cu2O nanocomposites were successfully synthesized by a facile one-pot redox reaction without additional reducing agent under room temperature. The morphologies and structures of the as-prepared products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The electrocatalytic performance of Au/Cu2O nanocomposites towards hydrogen peroxide was evaluated by cyclic voltammetry (CV) and chronoamperometry (CA). The prepared Au/Cu2O nanocomposite electrode showed a wide linear range from 25 to 11.2 mM (R = 0.9989) with a low detection limit of 1.05 μM (S/N = 3) and high sensitivity of 292.89 mA mM−1 cm−2. The enhanced performance for H2O2 detection can be attributed to the introduction of Au and the synergistic effect between Au and Cu2O. It is demonstrated that the Au/Cu2O nanocomposites material could be a promising candidate for H2O2 detection.
“…Fig. 4 shows the typical cyclic voltammograms recorded using MPS-A-PDC-Eu 3+ /GCE as working electrode at different scan rates (5,10,15,20,25, and 30 mV/s) in 0.1 M acetate buffer (pH 4.5). Inset of Fig.…”
Section: Effect Of Scan Rate At the Modified Mps-a-pdc-eu 3+ /Naf/gcementioning
confidence: 99%
“…[21][22][23]. Among all these techniques, electrochemical methods have attained more interest due to its high sensitivity, simple handling, low operating expense, rapid output and its ecofriendliness when compared with the other strategies [24][25][26][27][28][29]. http To date, there are some reports employing electrochemical technique based on FeMoO 4 , copper, iron-silver core-shell structure, or graphene-silver hybrid as sensing materials for detecting hydrogen peroxide.…”
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