Doping of graphene with nitrogen imparted bifunctional electrocatalytic activities for efficient energy conversion and storage.

A flexible cloth-like electrode, which can efficiently split water to produce H 2 at neutral pH, is successfully demonstrated.

Photoelectrochemical studies on a new Ti(<sc>iv</sc>)-based porous metal–organic framework (<bold>NTU-9</bold>, bandgap 1.72 eV) indicated that <bold>NTU-9</bold> is p-type semiconductor with visible-light-driven photoactivity.

In recent years, increasing interest has been devoted to synthesizing graphene-semiconductor nanocomposites as efficient photocatalysts for extensive applications. Unfortunately, it is still challenging make uniform composite films with controllable film thickness and architecture, which are of paramount importance meet the application requirements. this work, stable aqueous dispersion polymer-modified graphene nanosheets (GNs) was prepared via in situ reduction exfoliated graphite oxide...

ADVERTISEMENT RETURN TO ISSUEPREVViewpointNEXTUse of Platinum as the Counter Electrode to Study Activity Nonprecious Metal Catalysts for Hydrogen Evolution ReactionRong Chen†, Cangjie Yang†, Weizheng Cai†, Hsin-Yi Wang†, Jianwei Miao†, Liping Zhang†, Shengli Chen*‡, and Bin Liu*†View Author Information† School Chemical Biomedical Engineering, Nanyang Technological University, 62 Drive, Singapore 637459, Singapore‡ College Chemistry Molecular Sciences, Wuhan 430072, People’s Republic...

A number of important reactions such as the oxygen evolution reaction (OER) are catalyzed by transition metal oxides (TMOs), surface reactivity which is rather elusive. Therefore, rationally tailoring adsorption energy intermediates on TMOs to achieve desirable catalytic performance still remains a great challenge. Here we show identification general and tunable structure, coordinatively unsaturated cation (MCUS), good descriptor for in OER. Surface given TMO increases monotonically with...

Recent years have witnessed increasing interest in the solution‐phase synthesis of atomically precise thiolate‐protected gold clusters (Au x ); nonetheless, research on photocatalytic properties Au –semiconductor nanocomposites is still its infancy. In this work, recently developed glutathione‐capped and highly ordered nanoporous layer‐covered TiO 2 nanotube arrays (NP‐TNTAs) are employed as nanobuilding blocks for construction a well‐defined /NP‐TNTA heterostructure via facile electrostatic...

The implementation of water splitting systems, powered by sustainable energy resources, appears to be an attractive strategy for producing high-purity H2 in the absence release carbon dioxide (CO2 ). However, high cost, impractical operating conditions, and unsatisfactory efficiency stability conventional methods restrain their large-scale development. Seawater covers 70% Earth's surface is one most abundant natural resources on planet. New research looking into possibility using seawater...

Semiconductor‐based photocatalysis and photoelectrocatalysis have received considerable attention as alternative approaches for solar energy harvesting storage. The photocatalytic or photoelectrocatalytic performance of a semiconductor is closely related to the design at nanoscale. Among various nanostructures, one‐dimensional (1D) nanostructured photocatalysts photoelectrodes attracted increasing interest owing their unique optical, structural, electronic advantages. In this article,...

Abstract Inserting polymers into a crystalline inorganic matrix to understand the structure, position, and structure–property relationships of resulting composites is important for designing new inorganic‐organic materials tuning their properties. Single crystals polymer‐chalcogenide were successfully prepared by trapping polyethyleneglycol within selenidostannate under surfactant‐thermal conditions. This work might provide strategy preparing novel polymer‐inorganic through encapsulating...

Carbon-based nanomaterials have been widely studied as promising electrocatalysts for energy conversion and storage. Understanding the oxygen evolution reduction reactions on carbon-based is of critical importance development highly active metal-free electrocatalysts. Here, adsorption oxygenated intermediates during reaction (OER) carbon nanotubes (CNTs) was examined by ex-situ X-ray photoelectron spectroscopy in situ electrochemical impedance spectroscopy. The results demonstrate that atoms...

Deoxyribonucleic acid (DNA) is used to functionalize graphene and further guide the growth of ultrasmall palladium (Pd) nanocrystals with uniform distribution on ([email protected]), demonstrating greatly improved electrocatalytic performance towards formic oxidation for direct fuel cells.

Sunlight is an ideal source of energy, and converting sunlight into chemical fuels, mimicking what nature does, has attracted significant attention in the past decade. In terms solar energy conversion water splitting for hydrogen production one most attractive renewable technologies, this achievement would satisfy our increasing demand carbon-neutral sustainable energy. Here, we report corrosion-resistant, nanocomposite photoelectrodes spontaneous overall splitting, consisting a CdS quantum...

The formation of μ-OO peroxide (Co-OO-Co) moieties on spinel Co3O4 electrocatalyst prior to the rise electrochemical oxygen evolution reaction (OER) current was identified by in situ spectroscopic methods. Through a combination independent X-ray absorption, grazing-angle diffraction, and Raman analysis, we observed clear coincidence between anodic peak during OER. This finding implies that chemical step could be generally ignored before onset OER current. More importantly, tetrahedral Co2+...

Hierarchically ordered ZnO nanorods (NRs) decorated nanoporous-layer-covered TiO2 nanotube array (ZnO NRs/NP-TNTAs) nanocomposites have been prepared by an efficient, two-step anodization route combined with electrochemical deposition strategy, which monodispersed one-dimensional (1D) NRs were uniformly grown on the framework of NP-TNTAs. The crystal phases, morphologies, optical properties, photocatalytic as well photoelectrocatalytic performances well-defined NRs/NP-TNTAs heterostructures...

A facile and scalable co-precipitation method is developed to prepare stable colloidal NiFe-LDH nanoparticles at room temperature. We further scrolled into well-aligned multi-walled carbon nanotube (MWCNT) sheets form binder-free hybrid microfiber electrodes, which showed excellent OER activity, reaching 180 mA cm-2 a small overpotential of 255 mV with outstanding durability.

Hollow one-dimensional (1-D) nanostructures have drawn great attention in heterogeneous photocatalysis. Herein, we report that tapered polyacrylonitrile-derived carbon (C-PAN)/g-C3N4 composite nanotubes can be synthesized through a facile sulfur-mediated self-templating method via thermal condensation of polyacrylonitrile (PAN), melamine, and sulfur. The hollow C-PAN/g-C3N4 exhibit superior photocatalytic H2 evolution performance under visible light irradiation. 5 wt % show 16.7 times higher...

Hierarchical carbon@Ni₃S₂@MoS₂ (C@Ni₃S₂@MoS₂) double core–shell nanorods have been synthesized by a facile hydrothermal method using highly conductive carbon/Ni (C/Ni) as both the precursor and template.

Efficient hydrogen production from photoelectrochemical (PEC) water splitting is a promising route to solve the approaching energy crisis. Herein, we report facile all-electrochemical approach fabricate well-aligned ZnO–CdSe core–shell nanorod arrays with excellent uniformity on transparent indium tin oxide (ITO) substrates. The shell thickness of nanorods can be tuned precisely by adjusting charge density passing through working electrode during deposition CdSe quantum dots (QDs). optimized...

In recent years, much attention has been focused on the preparation of CdS–TiO2 nanotube array (CdS–TNTA) hybrid nanomaterials. Nevertheless, it is still challenging to synthesize hierarchically ordered CdS–TNTA heterostructures as efficient photocatalysts via a facile and simple approach. this work, tailor-made negatively charged CdS quantum dots (QDs) are evenly deposited hierarchical framework TiO2 arrays, consisting periodically nanorings surface nanotubes underneath, by modulating...

A one‐step in situ tailoring of NiCo 2 S 4 nanostructures is demonstrated on fluorine‐doped tin oxide (FTO) as Pt‐free counter electrodes (CEs) for dye‐sensitized solar cells (DSSCs) with performance surpassing that a conventional Pt‐sputtered CE. An interconnected nanosheet network successfully constructed the FTO glass via hydrothermal method, attributed to synergistic effect structure‐directing hexamethylenetetramine and L‐cysteine. growth mechanism proposed, effects sulfur atomic...

Recent years have witnessed quite a number of worldwide efforts for fabricating CdSe/TiO2 nanotube arrays (CdSe/TNTAs) nanocomposites; however, the construction well-defined CdSe/TNTAs binary nanostructure versatile photocatalytic and photoelectrochemical applications still poses big challenge. In this work, hierarchically ordered CdSe/nanoporous TiO2 (CdSe/NP-TNTAs) hybrid was fabricated through facile electrochemical deposition strategy. The combined structural morphological...