Hydrogen production on the new hetero-system Pr2NiO4/SnO2 under visible light irradiation

Benamira, M.; Lahmar, H.; Messaadia, L.; Rekhila, G.; Akika, F.Z.; Himrane, Mohammed; Trari, M.

doi:10.1016/j.ijhydene.2019.11.064

Cited by 48 publications

(9 citation statements)

References 49 publications

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“…As a typical n-type semiconductor, SnO 2 is extensively employed in photodetection, photo(electro)chemistry, and other fields owning to its stable, nontoxic, and excellent photoelectric properties. − The wide band gap of SnO 2 ( E g = 3.6 eV) guarantees the strong oxidation capacity while it leads to the poor light absorption properties, which impedes its visible light application. , Taken together, the construction of a heterojunction between BiOBr and SnO 2 may be a viable alternative to boost the overall photocatalytic activity. Although the elevated photocatalytic performance of heterojunctions has been proposed extensively in recent years, the electronic transport and microscopic mechanisms at the contact interface of heterojunction photocatalysts have not been sufficiently elaborated.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of Interfacial Charge Transfer and Photocatalytic NO Oxidation on BiOBr/SnO₂ p–n Heterojunctions

Hui-zhong

Yuan

Chen

et al. 2020

ACS Appl. Mater. Interfaces

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In this work, hydrothermally prepared p−n heterojunction BiOBr/SnO 2 photocatalysts were applied to eliminate NO in visible light. The as-synthesized BiOBr/SnO 2 photocatalysts exhibit superior photocatalytic activity and stability through the establishment of a p−n heterojunction, resulting in a significant improvement in charge separation and transfer properties. The morphological structure and optical property of the BiOBr/ SnO 2 heterojunction were also investigated comprehensively. Extended light absorption into the visible range was achieved by SnO 2 coating on the surface of the BiOBr microsphere through the constructed heterojunction between BiOBr and SnO 2 , thus achieving efficient NO removal. Moreover, the transfer channels and directions of charge at the BiOBr/SnO 2 interface were determined by a combination of theoretical calculations and experimental studies. Within this p− n heterojunction, the charge in SnO 2 migrates into BiOBr through the preformed electron transfer channels, thus generating an internal electric field (IEF) between SnO 2 and BiOBr. Under the influence of IEF, the photogenerated electrons of BiOBr migrate from the conduction band (CB) to the CB of SnO 2 , thus promoting the separation of electrons (e − )−holes (h + ) pairs. The intermediates and final products were monitored by the in situ DRIFTS technology in the process of removal of NO in visible light; hence, the oxidation pathways of NO were reasonably proposed. Meanwhile, the construction of the heterojunction not only achieves more efficient NO photocatalytic oxidation but also inhibits the production of more toxic NO 2 . This work provides mechanistic insights into the interfacial charge transfer for heterojunction photocatalysts and reaction mechanism for efficient air purification.

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Section: Introductionmentioning

confidence: 99%

Mechanisms of Interfacial Charge Transfer and Photocatalytic NO Oxidation on BiOBr/SnO₂ p–n Heterojunctions

Hui-zhong

Yuan

Chen

et al. 2020

ACS Appl. Mater. Interfaces

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“…The experiment tests of H 2 production by photocatalysis were carried out at 50°C according to our previous works [13]; above, the water loss by vaporization predominates. Briefly, the photocatalyst powder (100 mg) was introduced in a Pyrex reactor equipped with a cooling system.…”

Section: Characterization Methodsmentioning

confidence: 99%

“…Much work has been done on this topic in depth over the past two decades because of the considerable interest in the development of low-cost SCs [7][8][9][10]. Hydrogen gas is an important chemical that can replace fossil fuel, its production from raw materials such as water has been studied [11][12][13]. In addition, hydrogen does not cause pollution during combustion; it is renewable and has significant energy capacities [14].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Evolution of Hydrogen on CuFe2O4

Lahmar

Benamira

Messaadia

et al. 2020

Springer Proceedings in Energy

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We investigated the technical feasibility of photochemical hydrogen release based on CuFe 2 O 4 powder dispersion in an aqueous electrolyte containing a reducing agent (S 2 O 3 −2). The oxide combines an average resistance to corrosion and an optimum inter-referred band Eg of 1.67 eV. The intercalation of a small amount of oxygen should be accompanied by partial oxidation of Cu + to Cu 2+ involving a p-type semi-conductivity. The oxidation S 2− inhibits the photo-corrosion, and the evolution of H 2 increases in parallel with the formation of polysulfides. Most of H 2 is produced when p-CuFe 2 O 4 is connected to n-ZnO formed in situ. The release of H 2 is mainly on CuFe 2 O 4, whereas, the oxidation of S 2− takes place on the surface of ZnO and the hetero-system CuFe 2 O 4 /ZnO is optimized with respect to certain physical parameters. The photoelectrochemical production of H 2 is a multi-step process whose decisive step is the arrival of electrons at the interface due to their low mobility. Remarkable performance with a rate of 6.74 (μmol g −1 min −1) cm 3 h −1 hydrogen evolution in 0.1 M S 2 O 3 −2 (pH 13) is recorded.

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“…4 Recently, many non-precious metal co-catalysts have been developed, 5 such as metal sulde, [6][7][8] metal carbide, 9,10 metal nitride, 7,11 metal phosphide [12][13][14] and metallic oxide. 15,16 To promote the activity of CdS photocatalysts, our group has tried several strategies, including: (1) Pt-based bimetal cocatalysts, such as PtPd NPs, 17 PtNi NPs, 18 and PdNi NPs, 19 which can not only reduce the use of precious metals, but also improve the photocatalytic performance because of the synergistic effect of the bimetals; (2) nobel metal free cocatalysts, such as Ni 20 or Co, 21 also display high photocatalytic activity of H 2 generation; (3) structure redesign, such as PtNi x polyhedra, 22 PtNi x hollow structures 23 and PtNi x Co y concave nanocubes, 24 which provide more active sites for photocatalytic H 2 generation, and result in the promotion of activity of CdS; (4) dealloying PtNi x as a cocatalyst, which shows even higher activity in photocatalytic hydrogen generation. 25 In this work, a 2D/2D Ni 2 P/CdS heterostructure was synthesized and used in photocatalytic hydrogen generation from water splitting under visible light.…”

Section: Introductionmentioning

confidence: 99%

Two dimensional Ni₂P/CdS photocatalyst for boosting hydrogen production under visible light irradiation

et al. 2021

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Hydrogen production on the new hetero-system Pr2NiO4/SnO2 under visible light irradiation

Cited by 48 publications

References 49 publications

Mechanisms of Interfacial Charge Transfer and Photocatalytic NO Oxidation on BiOBr/SnO₂ p–n Heterojunctions

Mechanisms of Interfacial Charge Transfer and Photocatalytic NO Oxidation on BiOBr/SnO₂ p–n Heterojunctions

Photocatalytic Evolution of Hydrogen on CuFe2O4

Two dimensional Ni₂P/CdS photocatalyst for boosting hydrogen production under visible light irradiation

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Hydrogen production on the new hetero-system Pr2NiO4/SnO2 under visible light irradiation

Cited by 48 publications

References 49 publications

Mechanisms of Interfacial Charge Transfer and Photocatalytic NO Oxidation on BiOBr/SnO2 p–n Heterojunctions

Mechanisms of Interfacial Charge Transfer and Photocatalytic NO Oxidation on BiOBr/SnO2 p–n Heterojunctions

Photocatalytic Evolution of Hydrogen on CuFe2O4

Two dimensional Ni2P/CdS photocatalyst for boosting hydrogen production under visible light irradiation

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Product

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Mechanisms of Interfacial Charge Transfer and Photocatalytic NO Oxidation on BiOBr/SnO₂ p–n Heterojunctions

Mechanisms of Interfacial Charge Transfer and Photocatalytic NO Oxidation on BiOBr/SnO₂ p–n Heterojunctions

Two dimensional Ni₂P/CdS photocatalyst for boosting hydrogen production under visible light irradiation