Hydrogen evolution reaction catalyzed by microstructured SrMoO4 decorated on three-dimensional nanostructured rGO/f-MWCNT in acidic medium

Kareem, Abdul; Kunhiraman, Aruna K.; Maiyalagan, T.

doi:10.1007/s11581-020-03634-1

Cited by 20 publications

(10 citation statements)

References 49 publications

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“…However, the low intensity of these peaks proves the low crystallinity of SrMoO 4 and CoMoO 4 . Nonetheless, the signature peaks of SrMoO 4 at 33.7, 37.1, 38.5, 48.1, 76.3, 77.4, 82.3, 86.8 32 – 34 and of CoMoO 4 at 25.4, 32.4, 36.3, 38.5, 40.2, 45.2, 63.0 35 – 37 are very prominent in all samples 38 , 39 . The remaining crystallite phases were indexed as characteristic peaks of anatase and the titanium (Ti) phase acting as TiO 2 NT support 40 .…”

Section: Resultsmentioning

confidence: 86%

Modification of TiO2 nanotubes by graphene–strontium and cobalt molybdate perovskite for efficient hydrogen evolution reaction in acidic medium

Szkoda

Ilnicka

Skorupska

et al. 2022

Sci Rep

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Herein, we demonstrate that modification of TiO2 nanotubes with graphene–strontium and cobalt molybdate perovskite can turn them into active electrocatalysts for hydrogen evolution reaction (HER). For this purpose, a simple method of hydrothermal synthesis of perovskites was developed directly on the TiO2 nanotubes substrate. Moreover, the obtained hybrids were also decorated with graphene oxide (GO) during one-step hydrothermal synthesis. The obtained materials were characterized by scanning electron microscopy with energy dispersive X-ray analysis, Raman spectroscopy, and X-ray diffraction analysis. Catalytic properties were verified by electrochemical methods (linear voltammetry, chronopotentiometry). The obtained hybrids were characterized by much better catalytic properties towards hydrogen evolution reaction compared to TiO2 and slightly worse than platinum. The optimized hybrid catalyst (decorated by GO) can drive a cathodic current density of 10 mA cm−2 at an overpotential of 121 mV for HER with a small Tafel slope of 90 mV dec−1 in 0.2 M H2SO4.

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Section: Resultsmentioning

confidence: 86%

Modification of TiO2 nanotubes by graphene–strontium and cobalt molybdate perovskite for efficient hydrogen evolution reaction in acidic medium

Szkoda

Ilnicka

Skorupska

et al. 2022

Sci Rep

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show abstract

“…The morphologies and microstructures of the hybrid materials include of TiO prominent in all samples 30,31 . The remaining crystallite phases were indexed as characteristic peaks of anatase and the titanium (Ti) phase acting as TiO 2 NT support 32 .…”

Section: Physicochemical Characterizationmentioning

confidence: 99%

“…where η (V) means overpotential, a (V) is the cathodic intercept related to the exchange current density, b (V dec − 1 ) means the cathodic Tafel slope, and j (A cm − 2 ) means catalytic current density. Tafel slope values calculated from the linear portion of potential vs. logarithmic value of current density deliver useful kinetic metrics of the catalyst 30 TiO 2 /SrMoO 4 /GO showed the lowest Tafel slope value. In this case, the positive effect of the presence of carbon in all hybrids was also observed.…”

Section: Electrocatalytic Activities For Hydrogen Evolutionmentioning

confidence: 99%

Modification of TiO 2 nanotubes by graphene - strontium and cobalt molybdate perovskite for efficient hydrogen evolution reaction in acidic medium

Szkoda

Ilnicka

Skorupska

et al. 2022

Preprint

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Herein, we demonstrate that modification of TiO2 nanotubes with graphene-strontium and cobalt molybdate perovskite can turn them into active electrocatalysts for hydrogen evolution reaction (HER). For this purpose, a simple method of hydrothermal synthesis of perovskites was developed directly on the TiO2 nanotubes substrate. Moreover, the obtained hybrids were also decorated with graphene oxide (GO) during one-step hydrothermal synthesis. The obtained materials were characterized by scanning electron microscopy with energy dispersive X-ray analysis, Raman spectroscopy, and X-ray diffraction analysis. Catalytic properties were verified by electrochemical methods (linear voltammetry, chronopotentiometry). The obtained hybrids were characterized by much better catalytic properties towards hydrogen evolution reaction compared to TiO2 and slightly worse than platinum. The optimized hybrid catalyst (decorated by GO) can drive a cathodic current density of 10 mA cm−2 at an overpotential of 121 mV for HER with a small Tafel slope of 90 mV dec−1 in 0.2 M H2SO4.

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“…However, N-rGO also has some defects owing to the interaction between the rGO sheets be aggregated and reduce the surface area [38]. To solve this problem, the N-rGO incorporated with MWCNT to inhibit the rGO aggregation and to enhance the surface area of the N-rGO-MWCNT composite [39,40]. Besides, these carbon composites have been used to increase the surface area and higher electron transfer of the CuCrO 2 complex [41,42].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of N-rGO-MWCNT/CuCrO2 Catalyst for the Bifunctional Application of Hydrogen Evolution Reaction and Electrochemical Detection of Bisphenol-A

et al. 2021

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A glassy carbon electrode (GCE) coated with delafossite CuCrO2 loading on the nitrogen-doped reduced graphene oxide (N-rGO) and multiwalled carbon nanotubes (MWCNT) composite (N-rGO-MWCNT/CuCrO2) was applied to the hydrogen evolution reaction and Bisphenol-A (BPA) detection. First, the N-rGO-MWCNT composite was prepared by in situ chemical reduction with caffeic acid as a reducing agent. Then, CuCrO2 was accumulated on the N-rGO-MWCNT surface to form N-rGO-MWCNT/CuCrO2 composite. The morphology structure of the N-rGO-MWCNT/ CuCrO2 composite was analyzed by different characterization techniques. Besides, the GCE/N-rGO-MWCNT/CuCrO2 composite electrode was investigated for hydrogen evolution reaction (HER), which shows an excellent electrocatalytic activity with a low over-potential, increasing reduction current, and a small Tafel slope of 62 mV·dec−1 at 10 mA·cm−2 with long-term stability. Moreover, the electrochemical determination of BPA was in the range of 0.1-110 µM, and low detection limit of 0.033 µM (S/N = 3) with a higher sensitivity of 1.3726 µA µM−1 cm−2. Furthermore, the prepared GCE/N-rGO-MWCNT/CuCrO2 electrode shows effective detection of BPA in food samples with acceptable recoveries. Hence, the finding of GCE/N-rGO-MWCNT/CuCrO2 can be observed as an impressive catalyst to the electrocatalytic activity of HER and BPA oxidation.

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Hydrogen evolution reaction catalyzed by microstructured SrMoO4 decorated on three-dimensional nanostructured rGO/f-MWCNT in acidic medium

Cited by 20 publications

References 49 publications

Modification of TiO2 nanotubes by graphene–strontium and cobalt molybdate perovskite for efficient hydrogen evolution reaction in acidic medium

Modification of TiO2 nanotubes by graphene–strontium and cobalt molybdate perovskite for efficient hydrogen evolution reaction in acidic medium

Modification of TiO 2 nanotubes by graphene - strontium and cobalt molybdate perovskite for efficient hydrogen evolution reaction in acidic medium

Synthesis of N-rGO-MWCNT/CuCrO2 Catalyst for the Bifunctional Application of Hydrogen Evolution Reaction and Electrochemical Detection of Bisphenol-A

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