The cobalt phosphate water oxidation catalyst (Co–Pi WOC) stabilized, CdS sensitized TiO 2 nanowire arrays for nonsacrificial solar splitting are reported. In this /CdS/Co–Pi photoanode, the Co–Pi WOC acts as hole transfer relay to accelerate surface reaction, serves light absorber wider spectra harvesting, and matrix provides direct pathway electron transport. This triple hybrid photoanode exhibits much enhanced photocurrent density negatively shifts in onset potential, resulting 1.5 3.4...

Cobalt phosphate (Co-Pi) is photo-electrodeposited on TiO2 nanowire arrays in Co(2+) containing buffer. The resulting composite photoanode shows a generally enhanced photocurrent near the flat band potential region, and represents 2.3 times improved photoconversion efficiency compared to that of pristine neutral electrolyte. A negative effect generation also observed when loading with relatively thick Co-Pi layer, which demonstrated be due poor photohole transfer kinetics layer. Moreover, we...

Abstract Efficient charge transfer and excellent surface water oxidation kinetics are key factors in determining the photoelectrochemical (PEC) splitting performance photoelectrodes. Herein, a bilayer TiO 2 /α‐Fe O 3 nanorod (NR) arrays photoanode was prepared with deposited Cu‐doped NiO x (Cu : ) hole transport layer (HTL) Co−Pi oxygen evolution reaction (OER) cocatalyst for PEC oxidation. The hierarchical composite obtained by secondary hydrothermal process exhibited an inapparent...

This paper demonstrates the procedure for construction of nontoxic TiO₂/Bi₂S₃ core–shell NWA photoanodes PEC hydrogen generation.

Grain boundary engineering is a proven strategy to improve the efficiency of thin-film solar water splitting. In particular, photoelectrode with grain-through twins could exhibit efficient charge separation and transport properties. Herein, Cu2ZnSnS4 (CZTS) thin films coherent twin boundaries (CTBs) were fabricated on Mo-coated soda-lime glass (SLG) substrates via space-closed sulfurization method. The amount sulfur addition during annealing determines density crystallographic CTBs in CZTS...

Since the discovery of hydrogen evolution through photoelectrochemical (PEC) splitting water from n-type TiO2 electrodes, technology short-bandgap semiconductors (such as ZnSe, CdS and CdSe) combined with one-dimensional (1D) metal-oxide nanowire (NW) arrays (e.g., ZnO) to enhance their visible-light harvest efficiency has been widely studied. In this study, ZnSe/CdS/CdSe triple-sensitized ZnO NW were successfully fabricated on FTO substrates via a facile hydrothermal anion exchange...

Core/shell heterostructured TiO2/CdSxSe1-x nanowire arrays (NWAs) were prepared via physical vapor deposition of CdSxSe1-x layer onto the hydrothermal pre-grown TiO2 NWAs with FTO as conductive substrate. By change sulfur content (x) in nano-composites, it was observed that light absorption edge can be gradually tuned within a broad wavelength from 540 to 710 nm. When used photoanodes for hydrogen generation, as-prepared show much higher photoelectroncatalytic activity than pristine NWAs....

Interfacial passivation is the focal point for preparation of efficient and stable perovskite solar cells. A holistic modification strategy employing multifunctional interfacial material [1]benzothieno[3,2-b][1]benzothiophene-2-amine (BTBT-NH2) between tin oxide presented in this paper. It can be chemically linked to by Lewis base coordination reduce oxygen vacancy oxide. Furthermore, BTBT-NH2 containing lone pair electrons passivate unliganded lead ions anchor iodide completely at bottom...

Abstract Slow oxygen evolution kinetics and severe corrosion limit the further application of BiVO4 photoelectrodes in photoelectrochemical water splitting. Here, BiVO4/Co–Pi/Ni(OH)2 photoanodes were synthetized with aim improving their photoelectric conversion efficiency stability. Compared a pure photoanode, photoanode enhanced photocurrent from 1.1 to 4.5 mA/cm2 at 1.23 V versus reversible hydrogen electrode. In addition, Ni(OH)2 acted as protection layer on surface allowing exhibit excellent

Cobalt-phosphate water oxidation catalysts were successfully deposited onto TiO2/ZnSe core/shell nanowire arrays by photo-assisted electrodeposition methods. Photoelectrochemical (PEC) properties of the resulting composite photoanodes studied for solar-driven splitting under back side illumination in 0.5 M Na2SO3 electrolyte. Compared with pristine TiO2 and arrays, photoconversion efficiency TiO2/ZnSe/Co-Pi photoanode was increased 1.5 3.8 times at a bias voltage 0.6 V vs. Ag/AgCl. More...

Abstract The shortcomings of poor charge transfer ability and slow surface water oxidation kinetics in the single component photoanode limit performances photocatalytic splitting. Herein, a α‐Fe 2 O 3 /rGO/NiFe‐LDH composite was designed for enhancing photoelectrochemical (PEC) activity. rGO nanosheets serve as an efficient electron mediator promoting transport separation. NiFe‐LDH is well anchored on provides additional active sites accelerating reaction kinetics. By virtue synergistic...

Isogeometric Analysis combines the NURBS technology and finite element approaches into a unified framework. Regrettably, basis functions don’t interpolate at control points, which lead to difficulty for imposing essential boundary conditions. A new approach inspired by Nitsche’s notion was proposed in order remedy this issue. The constraints are enforced consistent penalty terms. It has some notable advantages than other methods, such as (i) symmetric positive definite bilinear formulation...

In this work, anatase N-doped TiO2 was prepared by a facile pre-sintering method. The usage of not only improved the electrical performance electron transport layer, but prevented high-temperature sintering substrate. As result, devices with exhibited higher average power conversion efficiency 16.65%. Furthermore, used in flexible devices, and high perovskite solar cells 14.52% achieved. Consequently, preparation could be promising method for boosting development cells.

This paper is devoted to the numerical simulation of heat transfer in fluids. We develop a formulation based on isogeometric analysis that permits straightforward construction higher order smooth NURBS approximation. Firstly, we introduce partial differential equation (PDE) which servers as basis for whole paper. Then, Lagrange multiplier method deal with essentional boundary contions accroding nature function. After getting Equivalent integral equation, solving format established idea...