Effect of rGO on Fe2O3–TiO2 composite incorporated NiP coating for boosting hydrogen evolution reaction in alkaline solution

Sumi, V.S.; Meera, Muraleedharan Sheela; Sha, M. Ameen; Shibli, S.M.A.

doi:10.1016/j.ijhydene.2019.11.167

Cited by 46 publications

(10 citation statements)

References 68 publications

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“…2.5 g of the sodium hypophosphite reducing agent was added when the temperature of the solution reached above 60 °C. At 75 °C, the surface-activated specimen (mild steel of dimensions 1 × 1 × 0.1 cm 3 ) with a copper wire connection was dipped into the bath for 2 h. The detailed activation process is given in the Supporting Information. Then, the steel strips were carefully taken out, dried, and leached through electrochemical leaching in 3% HCl at an applied current of 0.1 A.…”

Section: Methodsmentioning

confidence: 99%

Effect of Excess B in Ni₂P-Coated Boron Nitride on the Photocatalytic Hydrogen Evolution from Water Splitting

Meera

Sasidharan

Hossain

et al. 2022

ACS Appl. Energy Mater.

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The use of hexagonal boron nitride (hBN) to modify a semiconductor photocatalyst is one of the promising methods for the production of hydrogen from water splitting. This is due to the unique characteristics of the hBN-suppressing recombination of the photogenerated charge carriers and hence increase in the redox reactions. In the present work, a hBN-modified Ni2P-containing excess boron composite (B-hBN-Ni2P) was prepared through an electroless plating method. The solid structure, elemental composition, and morphology were investigated via X-ray diffraction, energy-dispersive X-ray spectroscopy, scanning electron microscopy, UV–visible spectroscopy, and photoluminescence spectroscopy. The composite coating was tested for solar water splitting, and a hydrogen evolution rate of 883 μmol/h was achieved. The role of excess B was revealed through an electrochemical acidic leaching. By gradually removing boron from the structure, a monotonous drop in the water splitting activity was observed. Our study identifies B as a sacrificial agent/hydrogen production booster. It contributes to the higher catalytic activity with an additional hydrogen generation through the oxidation of its surplus amount from the composite coating. The enhanced hydrogen evolution activity for the composite coating in the present study is highly competitive with the other modern photocatalysts.

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Section: Methodsmentioning

confidence: 99%

Effect of Excess B in Ni₂P-Coated Boron Nitride on the Photocatalytic Hydrogen Evolution from Water Splitting

Meera

Sasidharan

Hossain

et al. 2022

ACS Appl. Energy Mater.

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“…The removal of oxygen-containing groups during the reduction is confirmed from the decrease (almost disappearance) in the bands of C=O stretching, C-O-C stretching and C-O stretching. The relative decrease in the intensity of the O-H stretching band indicates that C-OH still exists, but in a lower proportion [ 52 , 53 , 54 ]. The sharp peaks at 497.63 and 493.68 cm

are attributed to the vibrations of the Mn–O bonds in MnOH [ 25 , 43 ].…”

Section: Results and Analysismentioning

confidence: 99%

Thermal and Rheological Characterization of Aqueous Nanofluids Based on Reduced Graphene Oxide (rGO) with Manganese Dioxide Nanocomposites (MnO2)

Lozano-Steinmetz

Ramírez-Navarro

Vivas³

et al. 2022

Nanomaterials

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Nanofluids have become of interest in recent years thanks to their improved thermal properties, which make them especially interesting for microchannel heat sink applications. In this study, we prepared two aqueous nanofluids based on reduced graphene oxide (rGO) decorated with manganese dioxide (MnO2) at a concentration of 0.1 wt.%. The difference between the two nanofluids was in the preparation of the reduced graphene oxide decorated with MnO2. In the first case, the manganese salt was mixed with ascorbic acid before GO reduction with NaOH, and in the second case, the GO reduction with NaOH occurred under ascorbic acid. Ascorbic acid not only plays the role of a non-toxic and ecofriendly reducing agent but also acts as an important parameter to control the reaction kinetics. The structural, microstructural and spectral characterizations of the MnO2/rGO nanocomposite were conducted via X-ray diffractometry (XRD), Raman spectroscopy, FT-IR, TEM, SEM and EDS analyses. Moreover, the synthesized MnO2/rGO nanocomposites were utilized as nanofluids and their stability, thermal conductivity and rheological behaviors were studied. The thermal conductivity of the MnO2/rGO and MnO2AsA/rGO nanofluids was 17% and 14.8% higher than that of water for the average temperature range, respectively, but their viscosity remained statistically equal to that of water. Moreover, both nanofluids presented Newtonian behavior in the analyzed shear rate range. Therefore, both MnO2/rGO and MnO2AsA/rGO nanofluids are promising alternatives for use in applications with micro- and millichannel heat sinks.

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“…In general, the Tafel slope helps predict the H 2 evolution reaction pathway represented by the Volmer-Heyrovsky or Volmer-Tafel mechanisms. 32,33 The Tafel slopes were calculated from the LSV plots using eqn (2) and are plotted (Fig. 4c and d).…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Sequential galvanic replacement mediated Pd-doped hollow Ru–Te nanorods for enhanced hydrogen evolution reaction mass activity in alkaline media

et al. 2022

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Effect of rGO on Fe2O3–TiO2 composite incorporated NiP coating for boosting hydrogen evolution reaction in alkaline solution

Cited by 46 publications

References 68 publications

Effect of Excess B in Ni₂P-Coated Boron Nitride on the Photocatalytic Hydrogen Evolution from Water Splitting

Effect of Excess B in Ni₂P-Coated Boron Nitride on the Photocatalytic Hydrogen Evolution from Water Splitting

Thermal and Rheological Characterization of Aqueous Nanofluids Based on Reduced Graphene Oxide (rGO) with Manganese Dioxide Nanocomposites (MnO2)

Sequential galvanic replacement mediated Pd-doped hollow Ru–Te nanorods for enhanced hydrogen evolution reaction mass activity in alkaline media

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Effect of rGO on Fe2O3–TiO2 composite incorporated NiP coating for boosting hydrogen evolution reaction in alkaline solution

Cited by 46 publications

References 68 publications

Effect of Excess B in Ni2P-Coated Boron Nitride on the Photocatalytic Hydrogen Evolution from Water Splitting

Effect of Excess B in Ni2P-Coated Boron Nitride on the Photocatalytic Hydrogen Evolution from Water Splitting

Thermal and Rheological Characterization of Aqueous Nanofluids Based on Reduced Graphene Oxide (rGO) with Manganese Dioxide Nanocomposites (MnO2)

Sequential galvanic replacement mediated Pd-doped hollow Ru–Te nanorods for enhanced hydrogen evolution reaction mass activity in alkaline media

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Product

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About

Effect of Excess B in Ni₂P-Coated Boron Nitride on the Photocatalytic Hydrogen Evolution from Water Splitting

Effect of Excess B in Ni₂P-Coated Boron Nitride on the Photocatalytic Hydrogen Evolution from Water Splitting