Nanoporous nickel hydroxide (Ni(OH)2) thin film was grown on the surface of ultrathin-graphite foam (UGF) via a hydrothermal reaction. The resulting free-standing Ni(OH)2/UGF composite used as electrode in supercapacitor without need for addition either binder or metal-based current collector. highly conductive 3D UGF network facilitates electron transport and porous Ni(OH)2 structure shortens ion diffusion paths rapid migration electrolyte ions. An asymmetric also made studied with positive...

A Si/graphene composite is drop-casted on an ultrathin-graphite foam (UGF) with three dimensional conductive network. The Si/graphene/UGF presents excellent stability and relatively high overall capacity when tested as anode for rechargeable lithium ion batteries.

Acid catalysts are essential for various chemical reactions in the industrial hydrocarbon chemistry. Sulfonated carbon has shown promising application as a new, cheap and environmentally friendly solid acid catalyst. In this study, we prepared sulfonated graphene catalyst, it was characterized by electron microscopy, Raman spectroscopy, state 13C MAS NMR, energy dispersive spectroscopy (EDS) X-ray photoelectron (XPS). Catalytic hydrolysis of ethyl acetate shows that highly catalytic activity...

MXenes, a family of two-dimensional (2D) transition-metal carbide and nitride materials, are supposed to be promising pseudocapacitive materials because their high electronic conductivity hydrophilic surfaces. prepared by removing the "A" elements corresponding MAX phases hydrofluoric acid (HF) or LiF–HCl etching, possess abundant terminal groups like −F, −OH, −O groups. It has been proven that MXenes with fewer −F more showed higher pseudocapacitor performance. In organic reactions, −OH −X...

Fenton-like reactions with persulfates as the oxidants have attracted increasing attentions for remediation of emerging antibiotic pollutions. However, developing effective activators outstanding activities and long-term stabilities remains a great challenge in these reactions. Herein, novel activator is successfully synthesized single iron atoms anchored on porous N-doped carbon (Fe-N-PC) by facile chemical vapor deposition (CVD) method. The Fe are coordinated four N according to XANES,...

An efficient strategy is proposed by engineering Co-doped MoS₂ coupled with Mo₂CT_x MXene to enhance the HER performance in alkaline media.

Nitrogen and sulfur co-doped graphene (N,S-G) is activated using ZnCl2, KOH, CO2 to develop different defects functionalities. The modified carbo-catalysts are used activate peroxymonosulfate (PMS) for phenol degradation. Compared with nitrogen-doped (N-G), N,S-G exhibits better catalytic activity, KOH activation further enhances the oxidation efficiency. Radical quenching experiments, electrochemical characterization, electron paramagnetic resonance characterization reveal that N-G...

Herein, a series of Co@N–C materials are synthesized using nitrates (LiNO3, NaNO3, and KNO3) as templates to control the preferential growth cobalt (200) facet. Co@N–C–X (X = LiNO3, exhibit excellent activities long-term stabilities for Fenton-like degradation bisphenol A (BPA) with peroxymonosulfate (PMS) an oxidant. The texture coefficient (TC) is used investigate relationship between Co facets their catalytic activities, linear relation built TC Co(200) reaction rate constant (k)....

The increasing demand for energy has triggered tremendous research effort the development of high-performance and durable energy-storage devices. Advanced graphene-based electrodes with high electrical conductivity ion accessibility can exhibit superior electrochemical performance in Among them, binder-free configurations enhance electron electrode, which leads to a higher capacity by avoiding addition non-conductive inactive binders. Graphene, 2D material, be fabricated into porous flexible...

AucorePdshell (Au@Pd) bimetallic nanoparticles of sub-10 nm were successfully dispersed on graphene by a simple one step reducing method. The Au@Pd nanoparticles–graphene (Au@Pd–G) hybrids characterized high-resolution transmission electron microscopy, scanning X-ray photoelectron spectroscopy, diffraction, energy spectroscopy and electronic loss spectroscopy. Evaluation their catalytic performance demonstrates the Au@Pd–G have extraordinary peroxidase activity as catalysts.

Abstract The development of highly efficient and durable non‐noble metal electrocatalysts for the hydrogen evolution reaction (HER) is significant clean renewable energy research. This work reports synthesis N‐doped graphene nanosheets supported carbon coated cobalt phosphide (CoP) nanoparticles via a pyrolysis subsequent phosphating process by using polyaniline. obtained electrocatalyst exhibits excellent electrochemical activity HER with small overpotential −135 mV at 10 mA cm −2 low Tafel...

Photocatalysis has attracted great attention due to its useful environmental applications for hazardous pollutants degradation and sustainable hydrogen evolution. Recently, transition metal dichalcogenide (TMD) based materials have shown potential in photocatalysis field. Due their special two-dimensional layered structure excellent electrochemical catalysis properties, they can be used as effective cocatalysts supports modify semiconductors enhanced photocatalytic activities. By loading...

Monolayer WS2 has interesting properties as a direct bandgap semiconductor, photocatalyst, and electrocatalyst, but it is still significant challenge to prepare this material in colloidal form by liquid-phase exfoliation (LPE). Here, we report the preparation of 1–2 layer semiconducting nanosheets yield 18–22 wt % modified LPE method that involves preintercalation with substoichometric quantities n-butyllithium. The exfoliated nanosheeets are n-type, have ∼1.78 eV, act cocatalyst CdS...

A novel three-dimensional (3D) photoanode with exfoliated MoS2 nanosheets on TiO2 nanorod arrays (TiO2 NAs) was successfully fabricated by combining hydrothermal and drop-casting methods. The influences of the different phases (1T 2H) photoelectrochemical (PEC) performances such a NAs/MoS2 3D system have been systematically investigated. Parallel experiments revealed that NAs/1T-MoS2 composite optimized 1T-MoS2 loading exhibited highest photoelectric conversion efficiency, which about 440...

Abstract Single‐atom catalysts (SACs) on 2D nanomaterials have great potential as efficient and low‐cost electrocatalysts for clean energy technologies. The coordination environments, well the physicochemical properties of supports, play key roles in tuning catalytic activity reaction mechanism single‐atom centers. This review first summarizes suitable synthetic strategies different supports. methods that facilitate formation relative homogeneous structure enable regulation surrounding...