CuxAgyInzZnkSm solid solutions customized with RuO2 or Rh1.32Cr0.66O3 co-catalyst display visible light-driven catalytic activity for CO2 reduction to CH3OH

Liu, Jen-Yu; Garg, Bhaskar; Ling, Yong‐Chien

doi:10.1039/c1gc15078b

Cited by 72 publications

(42 citation statements)

References 27 publications

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“…The maximum CH 3 OH yield observed was about 118.5 μmol g −1 h −1 in the presence of RuO 2 /Cu x Ag y In z Zn k S m photocatalysts under H 2 atmosphere [175]. The generation rate of CH 4 over meso-ZnGa 2 O 4 could be significantly enhanced by loading 1 wt% RuO 2 as co-catalyst to improve separation of the photogenerated electron-hole pairs [297].…”

Section: Developing Mesoporous Photocatalystsmentioning

confidence: 80%

“…Recently, many researchers have revealed that solid solutions exhibited relatively high activity and selectivity for photocatalytic reduction CO 2 to methanol, methane or ethanol under visible light. The multicomponent metal oxides (e.g., CuGa 1−x Fe x O 2 [174]), metal sulfides (e.g., solid solutions of ZnSCdS microcrystals [45] and Cu x Ag y In z Zn k S m [175]) and oxynitrides (e.g., zinc germanium oxynitride [176]) exhibited high activity for the photoreduction of CO 2 under visible light irradiation. For instance, the yellow Zn 1.7 GeN 1.8 O solid solution, synthesized by the nitridation of the wideband-gap Zn 2 GeO 4 , exhibits high activity for photocatalytic reduction CO 2 into CH 4 with H 2 O at room temperature under visible light irradiation.…”

Section: Solid Solutionmentioning

confidence: 99%

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Design and fabrication of semiconductor photocatalyst for photocatalytic reduction of CO2 to solar fuel

et al. 2014

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The shortage of fossil fuels and the disastrous pollution of the environment have led to an increasing interest in artificial photosynthesis. The photocatalytic conversion of CO 2 into solar fuel is believed to be one of the best methods to overcome both the energy crisis and environmental problems. It is of significant importance to efficiently manage the surface reactions and the photo-generated charge carriers to maximize the activity and selectivity of semiconductor photocatalysts for photoconversion of CO 2 and H 2 O to solar fuel. To date, a variety of strategies have been developed to boost their photocatalytic activity and selectivity for CO 2 photoreduction. Based on the analysis of limited factors in improving the photocatalytic efficiency and selectivity, this review attempts to summarize these strategies and their corresponding design principles, including increased visible-light excitation, promoted charge transfer and separation, enhanced adsorption and activation of CO 2 , accelerated CO 2 reduction kinetics and suppressed undesirable reaction. Furthermore, we not only provide a summary of the recent progress in the rational design and fabrication of highly active and selective photocatalysts for the photoreduction of CO 2 , but also offer some fundamental insights into designing highly efficient photocatalysts for water splitting or pollutant degradation. INTRODUCTIONThe shortage of the energy supply and the problem of disastrous environmental pollution have been recognized as two main challenges in the near future [1]. It is a better way to efficiently and inexpensively convert solar energy into chemical fuels by developing an artificial photosynthetic (APS) system because solar fuels are high density energy carriers with long-term storage capacity. The most important and challenging reactions in APS-the photocatalytic water splitting into H 2 and O 2 (water reduction and oxidation) [2][3][4] and photoreduction of CO 2 to solar fuel, such as CH 4 and CH 3 OH [5,6] have been extensively studied since the photocatalytic water splitting on TiO 2 electrodes was discovered by Honda and Fujishima in 1972 [7]. The photocatalytic reduction of CO 2 by means of solar energy has attracted growing attention in the recent years, which 1 State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China 2 College of Science, South China Agricultural University, Guangzhou 510642, China 3 Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia * Corresponding author (email: jiaguoyu@yahoo.com) is also believed to be one of the best methods to overcome both global warming and energy crisis [8]. However, it is also generally thought that photocatalytic CO 2 reduction is a more complex and difficult process than H 2 production due to preferential H 2 production and low selectivity for the carbon species produced [9,10]. The progress achieved in the photoreduction of CO 2 is still far behind that in wate...

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Section: Developing Mesoporous Photocatalystsmentioning

confidence: 80%

Section: Solid Solutionmentioning

confidence: 99%

Design and fabrication of semiconductor photocatalyst for photocatalytic reduction of CO2 to solar fuel

et al. 2014

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“…Such variations can be attributed to the effect of smaller particle size, which affects the vibrational amplitudes and force constant of nearest neighboring bond (Kaviyarasu and Premanand 2013). However, such smaller particle size along with the mixed phases of anatase and rutile constituents are expected to intensify the photocatalytic reactivity of TiO 2 under visible light (Kaviyarasu and Premanand 2013;Liu et al 2011;Truong et al 2012). The XRD pattern of Mg-doped TiO 2 polyscales indicated increased peak intensity inducing well crystalline phases, which are apparently stable and enhance the photochemical activities (Devi and Kavitha 2014;Shivaraju et al 2010a, b;Harikumar et al 2013).…”

Section: Resultsmentioning

confidence: 99%

Degradation of selected industrial dyes using Mg-doped TiO2 polyscales under natural sun light as an alternative driving energy

et al. 2017

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Designing photocatalytic materials with modified functionalities for the utilization of renewable energy sources as an alternative driving energy has attracted much attention in the area of sustainable wastewater treatment applications. Catalyst-assisted advanced oxidation process is an emerging treatment technology for organic pollutants and toxicants in industrial wastewater. Preparation of visible-light-responsive photocatalyst such as Mg-doped TiO 2 polyscales was carried out under mild sol-gel technique. Mg-doped TiO 2 polyscales were characterized by powder XRD, SEM, FTIR, and optical and photocatalytic activity techniques. The Mg-doped TiO 2 showed a mixed phase of anatase and rutile with an excellent crystallinity, structural elucidations, polyscales morphology, consequent shifting of bandgap energy and adequate photocatalytic activities under visible range of light. Mg-doped TiO 2 polyscales were investigated for their efficiencies in the degradation of most commonly used industrial dyes in the real-time textile wastewater. Mg-doped TiO 2 polyscales showed excellent photocatalytic degradation efficiency in both model industrial dyes (65-95%) and textile wastewater (92%) under natural sunlight as an alternative and renewable driving energy.

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“…A platinum electrode was employed as a counter electrode, and Ag/AgCl as the reference electrode. A CO 2 -saturated 0.1 M potassium bicarbonate aqueous solution (150 cm 3 ) was used as the electrolyte. The setup was used in potentiostatic mode at -1.65 V, because at this voltage maximum hydrocarbon formation has been typically reported in CO 2 electro-catalytic reductions, using Ag/AgCl as the reference electrode [13] (−1.44 V vs. reversible hydrogen electrode, RHE).…”

Section: Methodsmentioning

confidence: 99%

“…Different strategies of CO 2 reduction to valuable compounds are being studied, like catalytic reduction [2], photo-catalytic reduction [3][4][5], and electro-catalytic reduction [6].…”

Section: Introductionmentioning

confidence: 99%

Cobalt-Doped Carbon Gels as Electro-Catalysts for the Reduction of CO2 to Hydrocarbons

et al. 2017

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Two original series of carbon gels doped with different cobalt loadings and well-developed mesoporosity, aerogels and xerogels, have been prepared, exhaustively characterized, and tested as cathodes for the electro-catalytic reduction of CO 2 to hydrocarbons at atmospheric pressure. Commercial cobalt and graphite sheets have also been tested as cathodes for comparison. All of the doped carbon gels catalyzed the formation of hydrocarbons, at least from type C1 to C4. The catalytic activity depends mainly on the metal loading, nevertheless, the adsorption of a part of the products in the porous structure of the carbon gel cannot be ruled out. Apparent faradaic efficiencies calculated with these developed materials were better that those obtained with a commercial cobalt sheet as a cathode, especially considering the much lower amount of cobalt contained in the Co-doped carbon gels. The cobalt-carbon phases formed in these types of doped carbon gels improve the selectivity to C3-C4 hydrocarbons formation, obtaining even more C3 hydrocarbons than CH 4 in some cases.

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CuxAgyInzZnkSm solid solutions customized with RuO2 or Rh1.32Cr0.66O3 co-catalyst display visible light-driven catalytic activity for CO2 reduction to CH3OH

Cited by 72 publications

References 27 publications

Design and fabrication of semiconductor photocatalyst for photocatalytic reduction of CO2 to solar fuel

Design and fabrication of semiconductor photocatalyst for photocatalytic reduction of CO2 to solar fuel

Degradation of selected industrial dyes using Mg-doped TiO2 polyscales under natural sun light as an alternative driving energy

Cobalt-Doped Carbon Gels as Electro-Catalysts for the Reduction of CO2 to Hydrocarbons

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