Photocatalytic hydrogen production on nickel-loaded LaxNa1−xTaO3 prepared by hydrogen peroxide-water based process

Husin, Husni; Su, Wei‐Nien; Chen, Hung-Ming; Pan, Chun‐Jern; Chang, Shih‐Hong; Rick, John; Chuang, Wei‐Tsung; Sheu, Hwo‐Shuenn; Hwang, Bing‐Joe

doi:10.1039/c1gc15070g

Cited by 77 publications

(50 citation statements)

References 39 publications

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“…It could be attributed to the growth and agglomeration of Pt particles on the La0.02Na0.98TaO3 surface. This fact is consistent with the literature [17].…”

Section: -4supporting

confidence: 83%

Pt nanoparticle on La0.02Na0.98TaO3 catalyst for hydrogen evolution from glycerol aqueous solution

Husin

Adisalamun

et al. 2017

AIP Conference Proceedings

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Abstract. Pt nanoparticles on La-doped sodium tantalum oxide (La0.02Na0.98TaO3), which acts as an active co-catalyst for H2 evolution under UV light irradiation was successfully synthesized by photo-deposition method. The La0.02Na0.98TaO3 photocatalyst was obtained by the reaction of La(NO3)2.3H2O, TaCl5, and NaOH at ambient temperature. The catalyst produced was characterized by a scanning electron microscope (SEM) and a high-resolution transmission electron microscope (HRTEM). SEM images of the La0.02Na0.98TaO3 sample showing that its particles size is ranging between 50-150 nm. The Pt particles are detected from HRTEM images is around 2-4 nm. The Pt/La0.02Na0.98TaO3 samples prepared were applied for photocatalytic H2 production at 30 o C. The photocatalyst performance was evaluated for hydrogen production from water combining with glycerol as an electron donor (sacrificial reagent). The reactions were carried out in a closed reactor with a gas circulation system, illuminated with mercury (Hg) lamp. The experimental results show that the presence of glycerol in the systems can not only improve the efficiency of photocatalytic hydrogen generation but can also be decomposed to hydrogen efficiently. The photocatalytic activity of La0.02Na0.98TaO3 is significantly enhanced when Pt was loaded onto its crystalline surface.

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“…It could be attributed to the growth and agglomeration of Pt particles on the La0.02Na0.98TaO3 surface. This fact is consistent with the literature [17].…”

Section: -4supporting

confidence: 83%

Pt nanoparticle on La0.02Na0.98TaO3 catalyst for hydrogen evolution from glycerol aqueous solution

Husin

Adisalamun

et al. 2017

AIP Conference Proceedings

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“…[11,[20][21][22][23] In recent years, co-catalysts composed of earth-abundant elements have been explored aggressively to replace Pt as the extreme scarcity and high price of Pt restricts the massive application of photocatalysts such as Zn x Cd 1Àx S for large-scale solar H 2 production. [24] Especially, materials based on Ni, such as Ni, [25,26] NiS, [27,28] NiO, [26,[29][30][31] and Ni(OH) 2 , [5,32,33] are among the most active co-catalysts loaded on various semiconductor photocatalysts to achieve highly efficient and cost-effective photocatalytic H 2 production. For example, Dinh et al reported that the presence of Ni clusters as a co-catalyst could enhance the photocatalytic H 2 -production rate of a CdS-titanate nanocomposite by more than 77 times.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Visible‐Light Photocatalytic H₂ Production by Zn_xCd_1−xS Modified with Earth‐Abundant Nickel‐Based Cocatalysts

et al. 2014

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The application of various earth-abundant Ni species, such as NiS, Ni, Ni(OH)2 , and NiO, as a co-catalyst in a Znx Cd1-x S system for visible-light photocatalytic H2 production was investigated for the first time. The loading of Ni or NiS enhanced the photocatalytic activity of Znx Cd1-x S because they could promote the electron transfer at the interface with Znx Cd1-x S and catalyze the H2 evolution. Surprisingly, Ni(OH)2 -loaded Znx Cd1-x S exhibits a very high photocatalytic H2 -production rate of 7160 μmol h(-1) g(-1) with a quantum efficiency of 29.5 % at 420 nm, which represents one of the most efficient metal sulfide photocatalysts without a Pt co-catalyst to date. This outstanding activity arises from the pronounced synergetic effect between Ni(OH)2 and metallic Ni formed in situ during the photocatalytic reaction. However, the loading of NiO deactivated the activity of Znx Cd1-x S because of their unmatched conduction band positions. This paper reports the optimization of the Znx Cd1-x S system by selecting an appropriate Ni-based co-catalyst, Ni(OH)2 , from a series of Ni species to achieve the highest photocatalytic H2 -production activity for the first time and also reveals the roles of these Ni species in the photocatalytic activity.

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“…This fact explains nickel loading above 0,3% has negative result in the H2 production [19,20]. Nickel has probably cover the photocatalyst surface thus reducing photocatalyst effectiveness in absorbing light affecting the performance of the photocatalyst itself [21]. Figure 7 shown cumulative H2 productions over La-NaTaO3 catalyst during 5 h. Two cycles of reaction were carried out.…”

Section: Effect Of Glucose Concentration and Nio Loadingmentioning

confidence: 99%

Hydrogen production from water-glucose solution over NiO/La-NaTaO₃ photocatalyst

Mardian

Husin

Pontas

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. This paper reports the evaluation of La-NaTaO3 photocatalyst performance in producing hydrogen from water-glucose solution. The main goal of the studies is to investigate the influence of glucose as a sacrificial reagent on the photocatalytic efficiency in water splitting reactions under ultraviolet (UV) irradiation. Photocatalyst has been fabricated via solgel method and being confirmed using x-ray diffraction (XRD) and scanning electron microscopy (SEM). Nickel loaded La-NaTaO3 photocatalyst are prepared by impregnation method. It was observed that the prepared photocatalysts displayed particle sizes in the 30-250 nm range with orthorhombic structure. Their photocatalytic activity for hydrogen production via water splitting was conducted in a Pyrex glass reactor under UV light irradiation. The aqueous solution contained glucose employed as a renewable organic scavenger. A significant improvement in hydrogen production was observed in glucose-water mixtures and NiO loaded photocatalyst. The prepared La-NaTaO3 showed that the highest activity for hydrogen generation of 35.1 mmol h -1 .g -1 was obtained at 0.10 mol.L -1 glucose and 0.3 wt.% NiO. This suggests the important role played by the glucose as electron donor and loading nickel on LaNaTaO3 as a cocatalyst increasing electron storage and suppressing electron-hole recombination.

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Photocatalytic hydrogen production on nickel-loaded LaxNa1−xTaO3 prepared by hydrogen peroxide-water based process

Cited by 77 publications

References 39 publications

Pt nanoparticle on La0.02Na0.98TaO3 catalyst for hydrogen evolution from glycerol aqueous solution

Pt nanoparticle on La0.02Na0.98TaO3 catalyst for hydrogen evolution from glycerol aqueous solution

Enhanced Visible‐Light Photocatalytic H₂ Production by Zn_xCd_1−xS Modified with Earth‐Abundant Nickel‐Based Cocatalysts

Hydrogen production from water-glucose solution over NiO/La-NaTaO₃ photocatalyst

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Photocatalytic hydrogen production on nickel-loaded LaxNa1−xTaO3 prepared by hydrogen peroxide-water based process

Cited by 77 publications

References 39 publications

Pt nanoparticle on La0.02Na0.98TaO3 catalyst for hydrogen evolution from glycerol aqueous solution

Pt nanoparticle on La0.02Na0.98TaO3 catalyst for hydrogen evolution from glycerol aqueous solution

Enhanced Visible‐Light Photocatalytic H2 Production by ZnxCd1−xS Modified with Earth‐Abundant Nickel‐Based Cocatalysts

Hydrogen production from water-glucose solution over NiO/La-NaTaO3 photocatalyst

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Enhanced Visible‐Light Photocatalytic H₂ Production by Zn_xCd_1−xS Modified with Earth‐Abundant Nickel‐Based Cocatalysts

Hydrogen production from water-glucose solution over NiO/La-NaTaO₃ photocatalyst