TiO2 promoted by two different non-noble metal cocatalysts for enhanced photocatalytic H2 evolution

Lin, Jingdong; Shi, Yan; Huang, Qing-An; Fan, Mei-Ting; Yuan, Youzhu; Tan, Timothy Thatt-Yang; Liao, Dai‐Wei

doi:10.1016/j.apsusc.2014.05.008

Cited by 38 publications

(18 citation statements)

References 30 publications

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“…Hydrogen has been considered a promising candidate because it is a new pollution-free and renewable energy. Since Fujishima and Honda found the photocatalytic phenomenon of hydrogen generation with TiO 2 in 1972 [1], TiO 2 has been extensively studied as a photocatalyst for hydrogen production [2][3][4][5]. However, TiO 2 is only sensitive to near UV light occupying merely 4% of the sunlight energy [6].…”

Section: Introductionmentioning

confidence: 99%

Promotion effect of nickel loaded on CdS for photocatalytic H 2 production in lactic acid solution

Chen

Jiang

et al. 2014

Applied Surface Science

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Section: Introductionmentioning

confidence: 99%

Promotion effect of nickel loaded on CdS for photocatalytic H 2 production in lactic acid solution

Chen

Jiang

et al. 2014

Applied Surface Science

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“…[6][7][8][9][10][11] Among all the photocatalytical water splitting co-catalyst systems, Ni based co-catalysts have been extensively applied and shown good photocatalytical properties. [12][13][14][15][16][17] It is also attractive because Ni is considerably less expensive than noble metals for water splitting and it has been extended to many different semiconductor systems like oxides of Ti, Nb and Ta photocatalysts. [18][19][20] Ni/NiO core-shell structure has apparently been shown to be one of the most active co-catalyst for water splitting.…”

Section: Introductionmentioning

confidence: 99%

Structural Evolution during Photocorrosion of Ni/NiO Core/Shell Cocatalyst on TiO₂

et al. 2015

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The Ni/NiO core/shell structure is one of the most efficient co-catalysts for solar water splitting when coupled with suitable semiconducting oxides. It has been shown that pretreated Ni/NiO core/shell structures are more active than pure Ni metal, pure NiO or mixed dispersion of Ni metal and NiO nanoparticles. However, Ni/NiO core/shell structures on TiO 2 are only able to generate H 2 but not O 2 in aqueous water. The nature of the hydrogen evolution reaction in these systems was investigated by correlating photochemical H 2 production with atomic resolution structure determined with aberration corrected electron microscopy. It was found that the core/shell structure plays an important role for H 2 generation but the system undergoes deactivation due to a loss of metallic Ni. During the H 2 evolution reaction, the metal core initially formed partial voids which grew and eventually all the Ni diffused out of the coreshell into solution leaving an inactive hollow NiO void structure. The H 2 evolution was generated by a photochemical reaction involving photocorrosion of Ni metal.3

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“…No other characteristic peaks of SnO 2 are observed in XRD patterns, indicating that SnO 2 nanoparticles were successfully covered with TiO 2 . In addition, CoO and CuO oxides diffraction peaks are not detected, which can be attributed to low content and the thorough dispersion of co‐catalyst on the ST surface …”

Section: Resultsmentioning

confidence: 95%

SnO₂ -TiO₂ structures and the effect of CuO, CoO metal oxide on photocatalytic hydrogen production

Guerrero-Araque

Acevedo–Peña

Ramírez-Ortega

et al. 2017

J. Chem. Technol. Biotechnol

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BACKGROUND The technology for generating hydrogen using a photocatalyst has attracted considerable attention. Coupling TiO2 with other semiconductor oxides provided excellent results in decreasing recombination by transferring one of the charge carriers to another oxide. These photogenerated charge carriers play key roles in the reduction and oxidation process in photocatalytic hydrogen production. Nevertheless, even if the (e−‐h+) are separated, the reaction cannot happen without proper active sites. So, co‐catalysts are needed to improve the reduction and oxidation process on the surface of photocatalyst. RESULTS The hydrogen production of SnO2@TiO2 structure with CuO and CoO co‐catalysts (1 wt% of co‐catalyst: 1Co‐ST, 1Cu‐ST and 1Co‐1Cu‐ST) was studied under UV light, and characterized by XRD, N2 adsorption, UV‐vis reflectance diffuse, XPS and photoelectrochemical test. The dispersion of co‐catalyst on the surface of ST material during impregnation generates a decrease in the surface area and defect states in the optical properties. Maximum hydrogen production rate 1486.4 µmol g−1 h−1 is observed on 1Co‐1Cu‐ST photocatalyst. This improvement in photocatalytic reaction is related to the role played by each co‐catalyst. CONCLUSIONS The photocatalytic activity for H2 evolution shows the role of co‐catalyst in the redox reactions process. In the case of CuO co‐catalyst, it helps charge transfer, specifically electrons, to be carried out more efficiently by reducing water to produce H2. On the other hand, the role of CoO co‐catalyst is to catalyze the oxidation process, improving charge carriers separation and providing electrons to the SnO2@TiO2. © 2017 Society of Chemical Industry

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TiO2 promoted by two different non-noble metal cocatalysts for enhanced photocatalytic H2 evolution

Cited by 38 publications

References 30 publications

Promotion effect of nickel loaded on CdS for photocatalytic H 2 production in lactic acid solution

Promotion effect of nickel loaded on CdS for photocatalytic H 2 production in lactic acid solution

Structural Evolution during Photocorrosion of Ni/NiO Core/Shell Cocatalyst on TiO₂

SnO₂ -TiO₂ structures and the effect of CuO, CoO metal oxide on photocatalytic hydrogen production

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TiO2 promoted by two different non-noble metal cocatalysts for enhanced photocatalytic H2 evolution

Cited by 38 publications

References 30 publications

Promotion effect of nickel loaded on CdS for photocatalytic H 2 production in lactic acid solution

Promotion effect of nickel loaded on CdS for photocatalytic H 2 production in lactic acid solution

Structural Evolution during Photocorrosion of Ni/NiO Core/Shell Cocatalyst on TiO2

SnO2 -TiO2 structures and the effect of CuO, CoO metal oxide on photocatalytic hydrogen production

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Structural Evolution during Photocorrosion of Ni/NiO Core/Shell Cocatalyst on TiO₂

SnO₂ -TiO₂ structures and the effect of CuO, CoO metal oxide on photocatalytic hydrogen production