Treasure trove for efficient hydrogen evolution through water splitting using diverse perovskite photocatalysts

Ali, Syed Asim; Ahmad, Tokeer

doi:10.1016/j.mtchem.2023.101387

Cited by 35 publications

(39 citation statements)

References 262 publications

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“…Interesting nanosize domain for particles have attained appreciable recognition for their fundamental scientific interest besides diverse technological applications involving catalysis because of easily accessible large number of active sites and high specific surface area. , Effectual structural controlled synthesis of metal-oxide nanoparticles and heterostructures is gaining considerable interest for the tuning of particles at the nanoscale which exhibit incomparable physical and chemical properties with their latent utilization in various fields such as catalysis, hydrogen production, gas-sensing, energy storage, and so on. , Transition metal oxides can display properties covering all characteristics of solid state and material science which make them the most versatile class with larger family of materials . Tungsten oxide attained a lot of interest in research due to its remarkable properties for widespread applications as it forms various compounds since the tungsten metal has several oxidation numbers .…”

Section: Introductionmentioning

confidence: 99%

Ag-Doped WO₃ Nanoplates as Heterogenous Multifunctional Catalyst for Glycerol Acetylation, Electrocatalytic and Enhanced Photocatalytic Hydrogen Production

Naaz

Ahmad

2023

Langmuir

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Herein, we report a hydrothermal method to synthesize pristine and Agdoped WO 3 nanoplates and study their multifunctional competence in the accomplishment of enhanced catalytic organic conversion and highly efficient photocatalytic and electrocatalytic H 2 evolution reactions. The as-synthesized nanoplates were characterized by using various techniques including X-ray diffraction, field emission scanning electron microscopy-energy-dispersive X-ray analysis, transmission electron microscopy, UV−vis diffuse reflectance spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, and BET surface area studies. The significant catalytic performance was shown by 1% Agdoped WO 3 nanoplates with 100% glycerol conversion and 90% triacetin selectivity. The photocatalytic activity was also examined toward water splitting H 2 evolution reaction which demonstrates the highest H 2 evolution of 12.06 mmol g −1 catalyst for 1% Ag-doped WO 3 nanoplates in a time span of 8 h. Moreover, the electrocatalytic hydrogen evolution reaction was also monitored in acidic media (0.1 M H 2 SO 4 ) which demonstrates good results for 1% Ag-doped WO 3 nanoplates with a low overpotential of 0.53 V and a low Tafel slope of 40 mV dec −1 .

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Section: Introductionmentioning

confidence: 99%

Ag-Doped WO₃ Nanoplates as Heterogenous Multifunctional Catalyst for Glycerol Acetylation, Electrocatalytic and Enhanced Photocatalytic Hydrogen Production

Naaz

Ahmad

2023

Langmuir

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“…Perovskite oxides (ABO 3 ) are potential candidates due to their strong structure, adaptable physicochemical properties, and excellent stability under extremely alkaline conditions, facile synthesis, and diverse photocatalysis. ,− A few 3d and rare earth-based perovskite oxides (REPOs), such as LaFeO 3 , LaMnO 3 , LaNiO 3 , and LaMO 3 (M = Mn, Fe, and Co) perovskite nanoparticles, already have their OER/oxygen reduction reaction (ORR) activity studied. Other perovskite oxides such as La 0.5 Sr 0.5 CoO 3– x , La 1.5 Sr 0.5 NiMn 0.5 Ru 0.5 O 6 , La 0.6 Ca 0.4 CoO 3 , and La x (Ba 0.5 Sr 0.5 ) 1– x Co 0.8 Fe 0.2 O 3−δ have been also investigated for OER/ORR activity in addition to battery applications.…”

Section: Introductionmentioning

confidence: 99%

Bifunctional Multiferroic GdCrO₃ Nanoassemblies for Sustainable H₂ Production Using Electro- and Photocatalysis

Khan,

Lofland,

Ramanujachary

et al. 2023

ACS Appl. Energy Mater.

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In the realm of energy storage and conversion powered by electro- or photocatalysts, tremendous efforts are devoted on producing effective and long-lasting oxide catalysts. Here, we demonstrate multiferroic GdCrO3 nanoassemblies synthesized using a solvothermal method. X-ray diffraction (XRD) and XPS studies confirm the orthorhombic formation of GdCrO3. Scanning and high-resolution transmission electron microscopy shows the formation of nanoassemblies. Ferroelectric study reveals the remnant polarization of 2.36 μC cm–2 and oxygen vacancies. In an alkaline media, GdCrO3 nanoassemblies act as an efficacious and resilient oxygen evolution reaction electrocatalyst by showing superior specific activity. Photocatalytic H2 evolution studies show a high H2 evolution rate of 2 mmol h–1 gcat –1 and an apparent quantum yield of 23.2%. The mechanism for significant H2 generation is established by internal electric field-associated charge transfer, as confirmed by XPS measurements.

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“…But usually, the activity of these sensing materials generally decreases by template methods, along with the demerits of complicated synthetic procedures and high manufacturing costs, which may give them a setback or keep them on hold to use them in a variety of applications. To overcome these disadvantages, different nanostructures and microstructures of varying chemical compositions have been developed by several chemical routes for functional properties and applications. − …”

Section: Introductionmentioning

confidence: 99%

ZrO₂/CeO₂-Heterostructured Nanocomposites for Enhanced Carbon Monoxide Gas Sensing

Pandit

Ahmad

2023

ACS Appl. Nano Mater.

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CeO 2 and ZrO 2 nanospheres were successfully prepared by hydrothermal synthesis. From the as-synthesized pristine nanostructures, ZrO 2 −CeO 2 nanocomposite heterostructures with different weight percent ratios of 2.5, 5, 7.5, and 10% were prepared mechanically. The morphology and structural characteristics of the as-synthesized metal oxides and nanocomposites were investigated by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy studies. The UV−visible diffuse reflectance spectroscopic technique revealed band gaps of 2.95, 2.96, 2.91, and 2.83 eV of the 2.5− 10% ZrO 2 −CeO 2 composite heterostructures, respectively, which were found to be smaller than that of pristine CeO 2 (3.03 eV). Furthermore, the Brunauer−Emmett−Teller surface area studies revealed enhanced surface areas of 81.5, 67.6, 74.8, and 58.4 m 2 /g for 2.5−10% ZrO 2 −CeO 2 nanocomposite heterostructures, respectively, as compared to the pure CeO 2 having 53.2 m 2 /g. 7.5% ZrO 2 -decorated CeO 2 nanocomposite heterostructure manifested remarkable enhancement in the sensing performance response of 1475 displayed as compared to the pure CeO 2 response of 205. The improved sensing performance of the 7.5% ZrO 2 −CeO 2 sensor is likely to have originated from the decrease in the band gap, enhanced surface area, the existence of large oxygen vacancies on the ZrO 2 surface, and the formation of ZrO 2 −CeO 2 heterojunctions in nanocomposites. Further, the enhanced gas sensing properties along with the sensing mechanism are discussed in detail.

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Treasure trove for efficient hydrogen evolution through water splitting using diverse perovskite photocatalysts

Cited by 35 publications

References 262 publications

Ag-Doped WO₃ Nanoplates as Heterogenous Multifunctional Catalyst for Glycerol Acetylation, Electrocatalytic and Enhanced Photocatalytic Hydrogen Production

Ag-Doped WO₃ Nanoplates as Heterogenous Multifunctional Catalyst for Glycerol Acetylation, Electrocatalytic and Enhanced Photocatalytic Hydrogen Production

Bifunctional Multiferroic GdCrO₃ Nanoassemblies for Sustainable H₂ Production Using Electro- and Photocatalysis

ZrO₂/CeO₂-Heterostructured Nanocomposites for Enhanced Carbon Monoxide Gas Sensing

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Treasure trove for efficient hydrogen evolution through water splitting using diverse perovskite photocatalysts

Cited by 35 publications

References 262 publications

Ag-Doped WO3 Nanoplates as Heterogenous Multifunctional Catalyst for Glycerol Acetylation, Electrocatalytic and Enhanced Photocatalytic Hydrogen Production

Ag-Doped WO3 Nanoplates as Heterogenous Multifunctional Catalyst for Glycerol Acetylation, Electrocatalytic and Enhanced Photocatalytic Hydrogen Production

Bifunctional Multiferroic GdCrO3 Nanoassemblies for Sustainable H2 Production Using Electro- and Photocatalysis

ZrO2/CeO2-Heterostructured Nanocomposites for Enhanced Carbon Monoxide Gas Sensing

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Product

Resources

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Ag-Doped WO₃ Nanoplates as Heterogenous Multifunctional Catalyst for Glycerol Acetylation, Electrocatalytic and Enhanced Photocatalytic Hydrogen Production

Ag-Doped WO₃ Nanoplates as Heterogenous Multifunctional Catalyst for Glycerol Acetylation, Electrocatalytic and Enhanced Photocatalytic Hydrogen Production

Bifunctional Multiferroic GdCrO₃ Nanoassemblies for Sustainable H₂ Production Using Electro- and Photocatalysis

ZrO₂/CeO₂-Heterostructured Nanocomposites for Enhanced Carbon Monoxide Gas Sensing