Journal ArticleDOI
Electrochemical catalytic activity for the hydrogen oxidation of mesoporous WO3 and WO3/C composites
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TLDR
The mesoporous WO3 has a high surface area of 86 m2 g−1 and a well-crystallized framework as discussed by the authors, and it exhibits stable electrochemical activity for hydrogen desorption/oxidation in half-cell experiments, and after mixing with the appropriate amount of carbon black the resultant mesostructured WO 3/C composites show further enhanced electrocatalytic activity and even higher hydrogen oxidation/reduction peak currents than the commercial catalyst 20 wt% Pt/C.Abstract:
New catalysts for hydrogen oxidation, mesoporous WO3 and WO3/C composites, have been synthesized by a simple one-step casting method using mesoporous silica (KIT-6) as hard template. The materials were characterized with XRD, XPS, TEM and N2 sorption techniques. Cyclic voltammetry (CV) and single cell test for hydrogen oxidation were adopted to characterize the electrochemical performance of the materials. The mesoporous WO3 has a high surface area of 86 m2 g−1 and a well-crystallized framework. This material exhibits stable electrochemical activity for hydrogen desorption/oxidation in half-cell experiments, and after mixing with the appropriate amount of carbon black the resultant mesostructured WO3/C composites show further enhanced electrocatalytic activity and even higher hydrogen oxidation/reduction peak currents than the commercial catalyst 20 wt% Pt/C. The single cell test results indicate that the mesostructured WO3/C composites have clear current output in a proton exchange membrane fuel cell (PEMFC) and exhibit electrochemical catalytic activity toward hydrogen oxidation, and appears to be a potential anode catalyst in PEMFCs.read more
Citations
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Journal ArticleDOI
On the synergetic catalytic effect in heterogeneous nanocomposite catalysts.
TL;DR: This research presents a new mesoporous composite material for superfine microstructure that can be integrated into ceramic mixtures for high-performance materials such as glass and steel.
Journal ArticleDOI
Graphene-wrapped WO3 nanoparticles with improved performances in electrical conductivity and gas sensing properties
TL;DR: WO3/graphene nanoparticles anchored on graphene sheets as spacers to keep the neighboring sheets separated are approximately quadrangular with a side length of 50-200 nm.
Journal ArticleDOI
Preparation of 3-D ordered macroporous tungsten oxides and nano-crystalline particulate tungsten oxides using a colloidal crystal template method, and their structural characterization and application as photocatalysts under visible light irradiation
Masahiro Sadakane,Masahiro Sadakane,Keisuke Sasaki,Hironobu Kunioku,Bunsho Ohtani,Ryu Abe,Wataru Ueda +6 more
TL;DR: In this article, a 3D-ordered macroporous (3DOM) tungsten(VI) oxide (WO3) was prepared using a colloidal crystal template method.
Journal ArticleDOI
Oxygen vacancy-assisted hydrogen evolution reaction of the Pt/WO3 electrocatalyst
TL;DR: In this paper, the authors presented a facile approach to prepare an effective hydrogen evolution reaction (HER) catalyst with platinum atom clusters highly dispersed in WO3@CFC (carbon fiber cloth), which showed an overpotential of 42 mV at 10 mA cm−2 for the HER in 0.5 M H2SO4, which was highly comparable to that of the state-of-the-art commercial Pt/C catalysts (34 mV), and more attractively, largely enhanced mass activity of Pt and excellent electrochemical stability compared with that of
Journal ArticleDOI
WO3/Conducting Polymer Heterojunction Photoanodes for Efficient and Stable Photoelectrochemical Water Splitting.
TL;DR: In insight into the design and fabrication of novel photosynthetic and photocatalytic systems with excellent performance and stability through the hybridization of organic and inorganic materials, an efficient and stable heterojunction photoanode for solar water oxidation was fabricated.
References
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Journal ArticleDOI
Generalized syntheses of large-pore mesoporous metal oxides with semicrystalline frameworks
TL;DR: In this article, a simple and versatile procedure for the synthesis of thermally stable, ordered, large-pore (up to 140 A) mesoporous metal oxides was described.
Journal ArticleDOI
Cubic Ia3d large mesoporous silica: synthesis and replication to platinum nanowires, carbon nanorods and carbon nanotubes
TL;DR: In this article, a new synthesis route to high-quality large mesoporous cubic Ia3d silica is reported, utilizing a triblock copolymer (EO20PO70EO20) mixture for the structure direction in aqueous solution.
Journal ArticleDOI
Block Copolymer Templating Syntheses of Mesoporous Metal Oxides with Large Ordering Lengths and Semicrystalline Framework
TL;DR: A simple and general procedure has been developed for the syntheses of ordered largepore (up to 14 nm) mesoporous metal oxides, including TiO2, ZrO2, N b 2O5, T a 2 O5, A l 2O3, SiO2 and SnO2.
Journal ArticleDOI
Electrocatalysis of methanol oxidation
TL;DR: Most relevant aspects of methanol electrooxidation on Pt electrodes, including voltametric as well as spectroscopic data on the system are presented and discussed Parallel reaction pathways have been demonstrated, producing CO 2 and HCOOH or HCHO as soluble products as mentioned in this paper.
Journal ArticleDOI
Enhancement of Photocatalytic and Electrochromic Properties of Electrochemically Fabricated Mesoporous WO3 Thin Films
TL;DR: Mesoporous WO3 films with a lamellar structure have been synthesized by electrodeposition using sodium dodecyl sulfate (SDS) as a templating agent as mentioned in this paper.
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