Origin of highly efficient photocatalyst NiO/SrTiO3 for overall water splitting: Insights from density functional theory calculations

Fo, Yumeng; Wang, Miaomiao; Ma, Ye; Dong, Hao; Zhou, Xin

doi:10.1016/j.jssc.2020.121683

Cited by 18 publications

(13 citation statements)

References 43 publications

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“…Nickel as an electron trap reduces protons (water reduction site) and nickel oxide as a perforated trap oxidizes water [93]. Also, it has been recently concluded that the surface dimensions of SrTiO3 nanocubes in the photoelectrochemical oxidation of water affect its activity [94] and increase with increasing particle size [95]. Utilizing the perovskite-type titanate diversity as frontier materials [96], the 3D SrTiO3 architecture by hydrothermal method exhibits porous but single crystalline properties that represent a mesocrystalline, and therefore, the synthesized porous nanocubic assembly of SrTiO3 has a relatively extensive specific surface area compared to the SrTiO3 synthesized by the solid state reaction [97].…”

Section: Single Noble Metalmentioning

confidence: 99%

Hydrogen evolution via noble metals based photocatalysts: A review

et al. 2021

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In recent decades, the use of photocatalysts in the evolution of hydrogen (H2) has received much attention. However, the use of the well-known titanium oxide and another photocatalyst as a base for noble metals is limited due to their major weakness in electron-hole pair separation. The use of cocatalysts can be a good way to overcome this problem and provide better performance for the evolution of hydrogen. In this review, suitable high-efficiency cocatalysts for solar hydrogen production have been thoroughly reviewed. New strategies and solutions were examined in terms of increasing the recombination of charge carriers, designing reactive sites, and enhancing the wavelengths of light absorption. Several new types of cocatalysts based on semiconductors in noble groups and dual metals have been evaluated. It is expected that these photocatalysts will be able to reduce the activation energy of reaction and charge separation. In this regard, the existing views and challenges in the field of photocatalysts are presented. The characteristics of monoatomic photocatalysts are reviewed in this manuscript and the latest advances in this field are summarized. Further, the future trends and upcoming research are also briefly discussed. Finally, this review presents noble metal-based photocatalysts for providing suitable photocatalysts on a larger scale and improving their applicability.

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Section: Single Noble Metalmentioning

confidence: 99%

Hydrogen evolution via noble metals based photocatalysts: A review

et al. 2021

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“…Strontium titanate, or STO, is a remarkable perovskite oxide material as a photocatalyst [1]. STO has also become a highly stable, low-cost [2][3][4], and non-toxic [5] oxide semiconductor. It has an ABO3 cubic crystal structure with lattice parameters of 𝑎 = 𝑏 = 𝑐 = 0.3905 nm and pm3m space group [1,5].…”

Section: Introductionmentioning

confidence: 99%

“…STO has also become a highly stable, low-cost [2][3][4], and non-toxic [5] oxide semiconductor. It has an ABO3 cubic crystal structure with lattice parameters of 𝑎 = 𝑏 = 𝑐 = 0.3905 nm and pm3m space group [1,5]. At room temperature, the bandgap energy of STO is 3.2 eV [6].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Chemical Bonds, and Photocatalyst Activity of Neodymium-doped Strontium Titanate (Sr_0.97Nd_0.03TiO₃) with 900°C and 1000°C Sintering Temperature

Hasanah

Agustina

Puspita

et al. 2022

J. Phys.: Conf. Ser.

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Strontium Titanate is a perovskite oxide with remarkable properties as a photocatalyst. The synthesis of Strontium Titanate material with Neodymium doping (Sr0.97Nd0.03TiO3) has been completed by means of the co-precipitation procedure. Samples were sintered at temperatures of 900°C and 1000°C for 4 hours to investigate their properties. X-Ray Diffraction (XRD), Fourier-Transform Infrared spectroscopy (FTIR), and UV-Vis Spectrophotometer were employed to observe the microstructure, chemical bonds, and photocatalyst activity of Sr0.97Nd0.03TiO3. XRD data exhibited that the crystal size enlarged from 42.3 nm and 64.4 nm as the sintering temperature increased. FTIR data revealed strong Sr-Ti-O bonds and decreased C-H and C=H bond impurities as the sintering temperature increased. The photocatalytic performance was evaluated with methylene blue (MB) dye degradation by UV light irradiation for 3, 4, and 5 hours where the UV-Vis spectrophotometer tested the absorbance of the degraded MB. The results exhibited that Sr0.97Nd0.03TiO3 achieved the optimal degradation (62.7%) at 900°C and with 3 hours of irradiation.

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“…), noble metal deposition (such as Pt, 24 Au, 25 Ag, 26 etc. ), and supported metal oxides as cocatalysts (such as TiO 2 , 27 NiO x , [28][29][30] Cu 2 O, 31 etc.). Chen et al found that Ni 2 O 3 nanoparticles were deposited on the surface of CdS as electron traps to capture photogenerated electrons from the CdS surface under visible-light excitation, thereby facilitating the charge separation.…”

Section: Introductionmentioning

confidence: 99%

“…29 Similar results were also obtained by Fo et al, who showed that NiO modification benefited the movement and separation of photogenerated electrons and holes in the SrTiO 3 photocatalytic system, greatly improving the photocatalytic performance compared with pure SrTiO 3 . 30 NiO x as a co-catalyst has the characteristics of low cost, easy preparation, reduced bandgap width, and accelerated separation of electron-hole pairs, which makes it extremely possible for modified SrTiO 3 to boost its photocatalytic activity in photocatalytic CO 2 reduction.…”

Section: Introductionmentioning

confidence: 99%

Ni2O3-modified SrTiO3 for enhanced visible-light photocatalytic CO2 reduction activity

et al. 2022

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Low-cost and effective cocatalyst Ni 2 O 3 was loaded on SrTiO 3 (STO) via a simple one-step hydrothermal method. The Ni 2 O 3 ∕SrTiO 3 ðmÞ photocatalysts were systematically characterized and applied to visible-light-driven CO 2 reduction to investigate their photocatalytic activity. The series of the Ni 2 O 3 -modified SrTiO 3 photocatalysts presented an improved photocatalytic activity and stability. Here, the N 5.4 STOðmÞ catalyst showed the best photocatalytic activity, with CO and CH 4 yielding up to 11.57 and 1.51 μmol∕g, respectively, under visiblelight irradiation of 3 h, which were 3.15 and 14.84 times higher than that of pure STO(m), respectively. Based on the characterization and experimental results, the enhanced photocatalytic activity might be attributed to the following reasons: (1) Ni 2 O 3 well dispersed on SrTiO 3 served as CO 2 attachment sites; (2) the modification of Ni 2 O 3 could red shift the absorption edge and broaden the visible-light response ability; and (3) Ni 2 O 3 nanoparticles act as electron traps to capture photogenerated electrons, effectively blocking the recombination of electron-hole pairs. The work offers important insights into the design of non-noble metal oxide cocatalyst modified photocatalysts for electron capture and photoreduction.

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Origin of highly efficient photocatalyst NiO/SrTiO3 for overall water splitting: Insights from density functional theory calculations

Cited by 18 publications

References 43 publications

Hydrogen evolution via noble metals based photocatalysts: A review

Hydrogen evolution via noble metals based photocatalysts: A review

Microstructure, Chemical Bonds, and Photocatalyst Activity of Neodymium-doped Strontium Titanate (Sr_0.97Nd_0.03TiO₃) with 900°C and 1000°C Sintering Temperature

Ni2O3-modified SrTiO3 for enhanced visible-light photocatalytic CO2 reduction activity

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Origin of highly efficient photocatalyst NiO/SrTiO3 for overall water splitting: Insights from density functional theory calculations

Cited by 18 publications

References 43 publications

Hydrogen evolution via noble metals based photocatalysts: A review

Hydrogen evolution via noble metals based photocatalysts: A review

Microstructure, Chemical Bonds, and Photocatalyst Activity of Neodymium-doped Strontium Titanate (Sr0.97Nd0.03TiO3) with 900°C and 1000°C Sintering Temperature

Ni2O3-modified SrTiO3 for enhanced visible-light photocatalytic CO2 reduction activity

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Microstructure, Chemical Bonds, and Photocatalyst Activity of Neodymium-doped Strontium Titanate (Sr_0.97Nd_0.03TiO₃) with 900°C and 1000°C Sintering Temperature