Since the 1970s, splitting water using solar energy has been a focus of great attention as possible means for converting to chemical in form clean and renewable hydrogen fuel. Approaches include photocatalytic with homogeneous or heterogeneous photocatalysts, photoelectrochemical photoelectrocatalytic (PEC) PEC cell, electrolysis photovoltaic cells coupled electrocatalysts. Though many materials are capable photocatalytically producing and/or oxygen, overall conversion efficiency is still...

Rational construction of dual cocatalysts corresponding to different facets with photogenerated charge separation.

Abstract Monoclinic BiVO 4 crystals with preferentially exposed (040) facets were hydrothermally synthesized by using a trace amount of TiCl 3 as the directing agent; this function was confirmed X‐ray diffraction patterns (XRD) and high‐resolution transmission electron microscopy (HRTEM). The effects agent pH values applied during synthesis have been studied, optimized sample highly facet could be obtained 1.2 at. % at value 2. Some complementary techniques also to exclude structural...

The oxygen evolution is kinetically the key step in photocatalytic water splitting. Cocatalysts could lower activation potential for O2 evolution. However, cocatalyst has been less investigated, and few effective cocatalysts were reported. This paper reports that rate of splitting under visible light irradiation can be significantly enhanced when electrocatalyst cobalt–phosphate (denoted as CoPi) was deposited on BiVO4. photocurrent density also greatly by loading CoPi BiVO4 electrode, this...

Thiophene is one of the main sulfur-containing compounds in gasoline and difficult to be oxidized with conventional oxidative processes. Herein for first time we report that thiophene can SO3 on BiVO4 co-loaded Pt RuO2 co-catalysts (denoted as Pt-RuO2/BiVO4) under visible light irradiation molecular oxygen oxidant. The high activity catalyst achieved by only loading low 0.03 wt% 0.01 dual BiVO4. ESR measurements give evidence active species (˙OH O2˙−) generated photocatalytic processes are...

BiVO4 and many other semiconductor materials are ideal visible light responsive semiconductors, but insufficient for overall water splitting. Upon loading oxidation cocatalyst, example Co-borate (denoted as CoBi) used here, onto photoanode, it is found that not only the onset potential negatively shifted also photocurrent stability significantly improved. And more importantly, PEC splitting to H2 O2 realized using CoBi/BiVO4 photoanode with a rather low applied bias (less than 0.3 V vs....

The oxygen evolution reaction (OER) is regarded as one of the key issues in achieving efficient photocatalytic water splitting. Monoclinic scheelite BiVO(4) a visible-light-responsive semiconductor which has proved to be effective for evolution. Recently, synthesis series monoclinic single crystals was reported, and it found that (010), (110), (011) facets are highly exposed O(2) activity depends on degree exposure (010) facets. To explore properties oxidation different facets, DFT...

A composite Sr2TiO4/SrTiO3(La,Cr) heterojunction photocatalyst has been prepared by a simple in situ polymerized complex method. Upon Pt cocatalyst loading, this catalyst shows higher photocatalytic activity towards hydrogen production than individual SrTiO3(La,Cr) and Sr2TiO4(La,Cr) the presence of methanol sacrificial reagent. Microscopic morphology studies show that well defined heterojunctions are formed matching lattice fringes Sr2TiO4(La,Cr), was preferentially loaded on surface...

Intermediate MoS₂with rich active sites and desired stability was controllably synthesized exhibits optimized catalytic activity of anthracene hydrogenation.

Colloidal MoS2nanoparticles with diameters of less than 10 nm were prepared a simple solvothermal method and demonstrated high efficiency in catalyzing H2 evolution Ru(bpy)32+-based molecular systems under visible light.

Photocatalytic reforming of biomass is a promising way to produce hydrogen using renewable energy. methanol on Pt/TiO2–SO42− as model reaction was investigated. Sulfated TiO2 (TiO2–SO42−) with tunable surface phase prepared by calcining commercially available titanium dioxide (Degussa P25) deposited sodium sulfate Na2SO4 modifier. Compared P25, the as-prepared TiO2–SO42− Pt co-catalyst shows an increase up 6-fold in activity for H2 production via photocatalytic methanol, and CO (undesired...

Development of a photocatalyst with wide visible light absorption is vital importance in solar-chemical energy conversion. In this work, we introduce new nitrogen-doped layered oxide, Sr5Ta4O15−xNx, which exhibits significantly extended edge compared the undoped oxide Sr5Ta4O15. The extension has been ascribed to substitution nitrogen for oxygen atoms as well formation Ta–N bonds, was confirmed by X-ray diffraction (XRD) patterns, photoelectron spectroscopy (XPS) and Raman spectroscopy....

Hexagonal nanoflower WO3 arrays have been prepared by using RCOO− as the structure directing agent in microwave-assisted hydrothermal synthesis process. The photoelectrochemical performance of synthesized hexagonal flower-like electrode was enhanced compared with block-like film.

Designing MoS₂ nanocatalysts rich with active edge sites by engineering of the nanostructures is an effective strategy to enhance their catalytic activity.

Abstract Pt/ZSM‐22 with partially filled micropore channels (Pt/Z22‐PF) was prepared through a facile in‐situ coke deposition approach. Compared conventional evacuated (Pt/Z22‐E), Pt/Z22‐PF exhibits much higher activity and isomer yield in n‐dodecane hydroisomerization. Specifically, the turnover frequency of maximum multibranched on are about twice that Pt/Z22‐E (314 vs. 144 h −1 , 49 % 29 %). Theoretical simulations adsorption experiments demonstrate diffusion limitation hydrocarbon...

Developing highly dispersed few stacking layer MoS2 nanocatalysts with high exposure of active sites is still a challenge in improving their catalytic activities. Herein, we report facile strategy for fabricating quasi-single-layer (<3 layers) MoS2/TiO2 by novel one-step hydrothermal method using ammonium tetrathiomolybdate (ATM) and P25 (TiO2) as Mo precursor supporter, respectively. nanosheets on the quasi-single slab less than 10 nm expose maximum anthracene hydrogenation. The results...

High-surface-area α-Al 2 O 3 with abundant hydroxyls is synthesized by a ball-milling method. It demonstrates high catalytic activity and excellent stability for the CO oxidative coupling to dimethyl oxalate reaction.

The support of MgO/γ-Al2O3 was initially prepared by a multiple impregnation method and Pd placed on the surface via incipient wetness impregnation. Pd/MgO/γ-Al2O3 (Pd/MAO) catalysts were systematically characterized X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), CO2-temperature-programmed desorption (TPD), transmission electron microscopy (TEM), CO-Fourier transform infrared (CO-FTIR), photoelectron spectroscopy (XPS) tested in CO oxidative coupling to dimethyl oxalate (DMO)...