Journal ArticleDOI
Supported Pd and PdAu Nanoparticles on Ti-MCM-41 Prepared by a Photo-assisted Deposition Method as Efficient Catalysts for Direct Synthesis of H2O2 from H2 and O2
TLDR
In this paper, a photo-assisted deposition (PAD) method was used to synthesize highly active Pd nanoparticles using a single-site photocatalyst under UV-light irradiation for hydrogen peroxide (H2O2) from H2 and O2.Abstract:
An efficient methodology to synthesize highly active Pd nanoparticles using a single-site photocatalyst under UV-light irradiation has been developed for the synthesis of hydrogen peroxide (H2O2) from H2 and O2. By the photo-assisted deposition (PAD) method, Pd precursor can be deposited directly on the photo-excited tetrahedrally coordinated metal-oxide moiety within the silica frameworks, and subsequently transformed into Pd nanoparticles by H2 reduction. The mean diameter of the deposited Pd particles determined by CO adsorption and the catalytic activities in the direct synthesis of H2O2 were strongly dependent on the preparation method and kind and/or amount of metal-oxide moieties. Here, the use of Ti-containing mesoporous silica (Ti/Si = 0.01) acted as a most efficient support for the above reaction. The PAD method also provides PdAu bimetallic nanoparticles from an aqueous solution of mixture of PdCl2 and HAuCl4. The PdAu/Ti-MCM-41 catalyst prepared by the PAD method was shown to perform significantly better activity than the pure Pd/Ti-MCM-41.read more
Citations
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Journal ArticleDOI
Understanding TiO2 photocatalysis: mechanisms and materials.
Jenny Schneider,Masaya Matsuoka,Masato Takeuchi,Jinlong Zhang,Yu Horiuchi,Masakazu Anpo,Detlef W. Bahnemann +6 more
TL;DR: This paper presents a meta-analyses of the chiral stationary phase transition of Na6(CO3)(SO4)2, Na2SO4, and Na2CO3 of the Na2O/Na2O 2 mixture at the stationary phase and shows clear patterns in the response of these two materials to each other.
Journal ArticleDOI
A review on research progress in the direct synthesis of hydrogen peroxide from hydrogen and oxygen: noble-metal catalytic method, fuel-cell method and plasma method
TL;DR: In this paper, the authors reviewed the progress in the direct synthesis of H2O2 from H2 and O2 by noble-metal catalyst, fuel cell and plasma methods.
Journal ArticleDOI
Single-site and nano-confined photocatalysts designed in porous materials for environmental uses and solar fuels.
Hiromi Yamashita,Kohsuke Mori,Kohsuke Mori,Kohsuke Mori,Yasutaka Kuwahara,Yasutaka Kuwahara,Takashi Kamegawa,Takashi Kamegawa,Meicheng Wen,Priyanka Verma,Michel Che +10 more
TL;DR: This review mainly focuses on the fascinating photocatalytic properties of silica-supported Ti catalysts from single-site catalysts to nanoparticles, their surface-chemistry engineering, such as the hydrophobic modification and synthesis of thin films, and the fabrication of nanocatalysts including morphology controlled plasmonic nanostructures with localized surface plAsmon resonance.
Journal ArticleDOI
Functionalized mesoporous SBA-15 silica: recent trends and catalytic applications
Priyanka Verma,Priyanka Verma,Yasutaka Kuwahara,Yasutaka Kuwahara,Yasutaka Kuwahara,Kohsuke Mori,Kohsuke Mori,Robert Raja,Hiromi Yamashita,Hiromi Yamashita +9 more
TL;DR: Various strategies to functionalize SBA-15 mesoporous silica have been reviewed with a view to evaluating its efficacy in different catalytic transformation reactions.
Journal ArticleDOI
Recent Advances in the Direct Synthesis of H2O2
TL;DR: In this article, the authors discuss the key problems that remain and conclude that although there has been progress with respect to the selectivity of hydrogen utilisation, there is a need to now concentrate on catalyst activity as the key remaining problem requiring a solution is the concentration of H2O2 that can be achieved especially in flow reactors.
References
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Journal ArticleDOI
Ordered mesoporous molecular sieves synthesized by a liquid-crystal template mechanism
TL;DR: In this paper, the synthesis of mesoporous inorganic solids from calcination of aluminosilicate gels in the presence of surfactants is described, in which the silicate material forms inorganic walls between ordered surfactant micelles.
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