Electrocatalytic performance of cobalt doped copper bismuth oxide for glucose sensing and photoelectrochemical applications

Gudipati, Neeraja Sinha; Subramanyam, Palyam; Vanjari, SivaRama Krishna; Subrahmanyam, Ch.

doi:10.1016/j.inoche.2020.108112

Cited by 10 publications

(3 citation statements)

References 57 publications

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“…In addition, unbiased water splitting was examined using two electrodes connected in series with a photoanode and a photocathode. 42−46 For this purpose, a FTO/CuBi 2 O 4 film was prepared and used as a counter photocathode for hydrogen generation 46,47 6a, both anodic photocurrents significantly overlap with CuBi 2 O 4 cathodic photocurrents with an overlapping potential of 0.50 V for Bi 2 Se 3 and 0.37 V for TiO 2 /Bi 2 Se 3 , indicating the capability of unbiased solar-driven water splitting. Indeed, in a twoelectrode configuration, two electrodes were simply connected through a conducting wire and the experiment was carried out in an alkaline electrolyte medium under solar irradiation, and the results are presented in Figure 6b.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In addition, unbiased water splitting was examined using two electrodes connected in series with a photoanode and a photocathode. − For this purpose, a FTO/CuBi 2 O 4 film was prepared and used as a counter photocathode for hydrogen generation , and Bi 2 Se 3 or TiO 2 /Bi 2 Se 3 composite used as the photoanode for O 2 production. The detailed synthesis procedure and characterizations (such as XRD and ultraviolet–visible (UV–vis) spectra) of CuBi 2 O 4 are shown in the SI and Figure S5, respectively.…”

Section: Resultsmentioning

confidence: 99%

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TiO₂ Photoanodes Sensitized with Bi₂Se₃ Nanoflowers for Visible–Near-Infrared Photoelectrochemical Water Splitting

Subramanyam

Meena

Suryakala

et al. 2021

ACS Appl. Nano Mater.

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Semiconducting photoelectrodes emerge as an efficient platform for converting light energy into hydrogen by photoelectrochemical (PEC) water splitting. The present study reports the improvement in PEC performance using metal oxide photoelectrodes sensitized with a narrow-band-gap semiconductor Bi 2 Se 3 , which extends the light response beyond the visible region and generates and transports charge carriers. When Bi 2 Se 3 nanoflowers (NFs) were incorporated into the TiO 2 electrode, the extent of hydrogen production was found to be increased by an order of magnitude. The binary electrode TiO 2 /Bi 2 Se 3 nanocomposite exhibited a decent photocurrent density of 1.76 mA cm −2 at 1.23 V, which is three times superior to that of pure Bi 2 Se 3 NFs. Moreover, the binary TiO 2 /Bi 2 Se 3 electrode delivers the highest solar-to-hydrogen conversion efficiency of 1.01% at 0.6 V and incident photon-to-current conversion efficiency of 10.5%. Furthermore, both Bi 2 Se 3 and TiO 2 /Bi 2 Se 3 electrodes show superior photostabilities for over 6 h. The enhanced PEC activity is attributable to the facile transportation of photoelectrons from Bi 2 Se 3 to TiO 2 electrodes, thereby minimizing the charge recombination.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

TiO₂ Photoanodes Sensitized with Bi₂Se₃ Nanoflowers for Visible–Near-Infrared Photoelectrochemical Water Splitting

Subramanyam

Meena

Suryakala

et al. 2021

ACS Appl. Nano Mater.

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“…CuBi 2 O 4 -based photo-absorber cathodes for the HER using solar harvesting have been developed in our group and by others, such as Co-doped CuBi 2 O 4 22 and a TiO 2 /Bi 2 Se 3 photoanode-CuBi 2 O 4 photocathode PEC cell. 23 The reported photocurrent densities of pure CuBi 2 O 4 are low, and heterojunction fabrication is an efficient approach to boost the charge separation and broaden the light absorption range and photocurrent densities resulting in improved PEC performance.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Au nanoparticle sandwiched CuBi₂O₄/Sb₂S₃photocathode with multi-mediated electron transfer for efficient solar water splitting

Kumar

Ghosh

Meena

et al. 2022

Sustainable Energy Fuels

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Co₃O₄ and CuBi₂O₄ Hybrid Nanostructures for Efficient Nonenzymatic Glucose Detection in Human Blood and Serum Samples with Mechanistic Insights

et al. 2022

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In this report, CuBi2O4/Co3O4 has been used for the electrochemical detection of glucose. Herein, CuBi2O4 nanorods and Co3O4 has been hybridized with CuBi2O4 to form CuBi2O4/Co3O4 nanocomposite hydrothermally. CuBi2O4 and CuBi2O4/Co3O4 electrodes are fabricated by using drop casting method. Structural, morphological studies of CuBi2O4/Co3O4 and electrochemical characterizations pertaining to its performance in comparison to CuBi2O4 for electrochemical detection of glucose are performed and discussed elaborately. The detailed mechanism involved in the electrochemical detection of glucose is proposed. The electrode has shown the sensitivity of 49 μA mM−1 cm−2 with a limit of detection (LOD) of 0.136 μM. DFT calculations are performed on the optimized molecules involved in the electrochemical detection of glucose confirming CuBi2O4/Co3O4 acting as electron donor while glucose as electron acceptor. Further, natural bond orbital (NBO) for charge distribution calculations and ESP mappings for the optimized molecules are performed to understand nucleophilic/electrophilic positions. This study reveals that CuBi2O4 and its modifications are promising materials for the electrochemical detection of glucose. Further, the role of Co3O4 in improving the sensitivity and electrochemical performance for detection of glucose has been discussed.

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Electrocatalytic performance of cobalt doped copper bismuth oxide for glucose sensing and photoelectrochemical applications

Cited by 10 publications

References 57 publications

TiO₂ Photoanodes Sensitized with Bi₂Se₃ Nanoflowers for Visible–Near-Infrared Photoelectrochemical Water Splitting

TiO₂ Photoanodes Sensitized with Bi₂Se₃ Nanoflowers for Visible–Near-Infrared Photoelectrochemical Water Splitting

Plasmonic Au nanoparticle sandwiched CuBi₂O₄/Sb₂S₃photocathode with multi-mediated electron transfer for efficient solar water splitting

Co₃O₄ and CuBi₂O₄ Hybrid Nanostructures for Efficient Nonenzymatic Glucose Detection in Human Blood and Serum Samples with Mechanistic Insights

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Electrocatalytic performance of cobalt doped copper bismuth oxide for glucose sensing and photoelectrochemical applications

Cited by 10 publications

References 57 publications

TiO2 Photoanodes Sensitized with Bi2Se3 Nanoflowers for Visible–Near-Infrared Photoelectrochemical Water Splitting

TiO2 Photoanodes Sensitized with Bi2Se3 Nanoflowers for Visible–Near-Infrared Photoelectrochemical Water Splitting

Plasmonic Au nanoparticle sandwiched CuBi2O4/Sb2S3photocathode with multi-mediated electron transfer for efficient solar water splitting

Co3O4 and CuBi2O4 Hybrid Nanostructures for Efficient Nonenzymatic Glucose Detection in Human Blood and Serum Samples with Mechanistic Insights

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TiO₂ Photoanodes Sensitized with Bi₂Se₃ Nanoflowers for Visible–Near-Infrared Photoelectrochemical Water Splitting

TiO₂ Photoanodes Sensitized with Bi₂Se₃ Nanoflowers for Visible–Near-Infrared Photoelectrochemical Water Splitting

Plasmonic Au nanoparticle sandwiched CuBi₂O₄/Sb₂S₃photocathode with multi-mediated electron transfer for efficient solar water splitting

Co₃O₄ and CuBi₂O₄ Hybrid Nanostructures for Efficient Nonenzymatic Glucose Detection in Human Blood and Serum Samples with Mechanistic Insights