Zn-Ce-Ga trimetal oxysulfide as a dual-functional catalyst: Hydrogen evolution and hydrogenation reactions in a mild condition

Girma, Sisay; Abdullah, Hairus; Kuo, Dong‐Hau; Lakew, Worku; Shuwanto, Hardy; Fentie, Sleshi

doi:10.1016/j.apsusc.2021.150383

Cited by 17 publications

(3 citation statements)

References 78 publications

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“…The literature shows that various semiconductor materials, such as CdS [ 10 ], TiO 2 [ 11 ], MoS 2 [ 12 ], BiVO 4 –ZnCdS [ 13 ], ZnIn 2 S 4 [ 14 ], and oxysulfides (OS) including MoCuOS [ 15 ], Zn-NiOS [ 16 ], Al 2 OS [ 17 ], and Zn-Ce-GaOS [ 18 ], have been developed for photocatalytic hydrogen production. Among these materials, metal vanadates with general formulae (M 3 V 2 O 8 ; M = Zn, Cd, Ni, Cu, Co, etc.)…”

Section: Introductionmentioning

confidence: 99%

Zinc Vanadate (Zn3V2O8) Immobilized Multiwall Carbon Nanotube (MWCNT) Heterojunction as an Efficient Photocatalyst for Visible Light Driven Hydrogen Production

et al. 2023

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Z-scheme photocatalytic reaction is considered an effective strategy to promote the photogenerated electron-hole separation for significantly improving the efficiency of photocatalytic hydrogen precipitation from splitting water. In this study, a heterojunction nanocomposite material based on Zn3V2O8 (ZV) with MWCNT was prepared by a hydrothermal process. The photocatalysts were characterized by X-ray diffraction, scanning electron microscopy (SEM), Fourier transform infrared (FTIR), UV-visible absorption spectroscopy, and transmission electron microscopy (TEM) to understand crystal structure, morphology, and optical properties. The efficiency of the samples was evaluated for the photocatalytic H2 production under visible solar radiation using water glycerol as a sacrificial reagent. The obtained results suggest that, between ZV and ZV@MWCNT, the latter shows higher efficiency for H2 production. The maximum H2 production efficiency was found to be 26.87 μmol g–1 h–1 for ZV and 99.55 μmol g–1 h–1 for ZV@MWCNT. The synergistic effect of MWCNT to ZV resulted in improving the efficiency of charges and light-absorbing capacity, resulting in enhanced H2 production in the heterojunction nanocomposite material. The nanocomposite was stable and highly efficient for H2 production of six or more cycles. Based on the outcomes of this study, it can be observed that forming the heterojunction of individual nano systems could result in more efficient material for H2 production under visible solar energy.

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Section: Introductionmentioning

confidence: 99%

Zinc Vanadate (Zn3V2O8) Immobilized Multiwall Carbon Nanotube (MWCNT) Heterojunction as an Efficient Photocatalyst for Visible Light Driven Hydrogen Production

et al. 2023

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“…Besides the photoexcitation process, the adsorption kinetic of water molecules on the photoanode is also crucial. The adsorption can be enhanced when the oxygen vacancy (V O 2 + ) sites are available on material surfaces, as shown in many previous works. − On the basis of the XPS result, BF-5 photoanode exhibited 10.95% V O , which is propitious to the water adsorption during the PEC reaction. The details of water oxidation reaction mechanism without and with Bi dopant on α-Fe 2 O 3 are indicated in Figure a, b, respectively.…”

Section: Resultsmentioning

confidence: 63%

Nanostructuring Bi-Doped α-Fe₂O₃ Thin-Layer Photoanode to Advance the Water Oxidation Performance

Shuwanto

Abdullah

Kuo

2022

ACS Appl. Energy Mater.

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A nanograin α-Fe2O3 thin-film photoanode with Bi dopant was successfully synthesized with a simple electrodeposition method on indium tin oxide (ITO) glass and annealing at 550 °C for 3 h. The thin-film photoanodes were characterized and evaluated for their capabilities in oxidizing water. Incorporating Bi dopant into the photoanode could cathodically shift the onset potential to 0.43 V at 0.6 mA/cm2 under a 150 W solar light illumination. Interestingly, the incident photon-to-electron (IPCE) and applied bias photon-to-current efficiency (ABPE) could achieve 22.2 and 0.63%, respectively. On the basis of the experimental data, the low onset potential is notably supported by the nanosized α-Fe2O3 with substitutional defects of Bife + and oxygen vacancy (VO) to overcome the limitation of natural α-Fe2O3. A density functional theory (DFT) calculation also indicated that the water adsorption step on the modified 5%-bismuth-doped Fe2O3 (BF-5) photoanode was thermodynamically favorable compared to the pristine α-Fe2O3. As a result, the BF-5 photoanode could support the water-splitting process close to a stoichiometric ratio with Pt as the cathode. This work demonstrated an exciting strategy to overcome the short diffusion length of α-Fe2O3 in separating excitons during photoreaction.

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“…The multiple valence states occurred at the Mn and Fe elements of the dual-phase catalyst. For single state Ga 2p in Figure S5d, the corresponding peaks appeared at 1117.35 and 1144.22 eV for both Ga 2p 3/2 and Ga 2p 1/2 orbitals, respectively. − The two deconvoluted peaks of O 1s at 529.47 and 531.29 eV were ascribed to the lattice oxygen (O L ) and oxygen vacancy (OV), respectively, as depicted in Figure e. ,, 50.71% O contains 52.89% O L and 47.11% OV (Table S2). The OV site, not belonging to the lattice-bonded oxygen, is weakly attached by oxygen species.…”

Section: Resultsmentioning

confidence: 94%

In Situ Grown (Fe,Mn,Ga)₃O_4–x Spinel/(Mn,Fe)₂O_3–y Bixbyite Dual-Phase Electrocatalyst for Preeminent Nitrogen Reduction to Ammonia: A Step toward the NH₃ Economy

Gemeda

Kuo

Wolde

et al. 2023

ACS Appl. Energy Mater.

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Employing a non-noble trimetal oxide system toward an electrochemical nitrogen reduction reaction (eNRR) instead of a century-long and CO2-emission Haber–Bosch process reveals a green path for NH3 production. In this work, the trimetal Fe–Mn–Ga oxide electrocatalyst was prepared with a facile one-pot hydrothermal method followed by annealing. Crystal structure, morphology, composition, and electrochemical properties were characterized. The flower-like (Fe,Mn,Ga)3O4–x spinel/tabular crystal-like (Mn,Fe)2O3–y bixbyite composite electrocatalyst was in situ formed with many active oxygen atoms on the oxygen vacancy sites and transition metals of Fe and Mn at multiple oxidation states. In a N2-saturated 0.1 M Na2SO4 solution, the NH3 yield rate at a potential of −0.6 V vs RHE is 814 μg h–1mgcat –1 (2036 μg h–1cm–2) with Faradaic efficiency (FE) of 5.77%, while the highest FE of 19.7% is achieved at −0.5 V with a yield rate of 599 μg h–1mgcat –1. The reaction mechanism for NH3 production is investigated and explained.

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Zn-Ce-Ga trimetal oxysulfide as a dual-functional catalyst: Hydrogen evolution and hydrogenation reactions in a mild condition

Cited by 17 publications

References 78 publications

Zinc Vanadate (Zn3V2O8) Immobilized Multiwall Carbon Nanotube (MWCNT) Heterojunction as an Efficient Photocatalyst for Visible Light Driven Hydrogen Production

Zinc Vanadate (Zn3V2O8) Immobilized Multiwall Carbon Nanotube (MWCNT) Heterojunction as an Efficient Photocatalyst for Visible Light Driven Hydrogen Production

Nanostructuring Bi-Doped α-Fe₂O₃ Thin-Layer Photoanode to Advance the Water Oxidation Performance

In Situ Grown (Fe,Mn,Ga)₃O_4–x Spinel/(Mn,Fe)₂O_3–y Bixbyite Dual-Phase Electrocatalyst for Preeminent Nitrogen Reduction to Ammonia: A Step toward the NH₃ Economy

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Zn-Ce-Ga trimetal oxysulfide as a dual-functional catalyst: Hydrogen evolution and hydrogenation reactions in a mild condition

Cited by 17 publications

References 78 publications

Zinc Vanadate (Zn3V2O8) Immobilized Multiwall Carbon Nanotube (MWCNT) Heterojunction as an Efficient Photocatalyst for Visible Light Driven Hydrogen Production

Zinc Vanadate (Zn3V2O8) Immobilized Multiwall Carbon Nanotube (MWCNT) Heterojunction as an Efficient Photocatalyst for Visible Light Driven Hydrogen Production

Nanostructuring Bi-Doped α-Fe2O3 Thin-Layer Photoanode to Advance the Water Oxidation Performance

In Situ Grown (Fe,Mn,Ga)3O4–x Spinel/(Mn,Fe)2O3–y Bixbyite Dual-Phase Electrocatalyst for Preeminent Nitrogen Reduction to Ammonia: A Step toward the NH3 Economy

Contact Info

Product

Resources

About

Nanostructuring Bi-Doped α-Fe₂O₃ Thin-Layer Photoanode to Advance the Water Oxidation Performance

In Situ Grown (Fe,Mn,Ga)₃O_4–x Spinel/(Mn,Fe)₂O_3–y Bixbyite Dual-Phase Electrocatalyst for Preeminent Nitrogen Reduction to Ammonia: A Step toward the NH₃ Economy