Molybdenum disulfide (MoS2) has emerged as a promising electrocatalyst for catalyzing protons to hydrogen via the so-called evolution reaction (HER). In order enhance HER activity, tremendous effort been made engineer MoS2 catalysts with either more active sites or higher conductivity. However, at present, synergistically structural and electronic modulations still remain challenging. this work, we demonstrate successfully synergistic regulations of both benefits by controllable disorder...

Oxidative wet-chemical delamination of graphene from graphite is expected to become a scalable production method. However, the formation process intermediate stage-1 sulfate by sulfuric acid intercalation and its subsequent oxidation are poorly understood lattice defect must be avoided. Here, we demonstrate film micrometer-sized flakes with defects down 0.02% visualize carbon transmission electron microscopy at atomic resolution. Interestingly, find that only well-ordered, highly crystalline...

The utilization of oxygen vacancies (OVs) in sodium ion batteries (SIBs) is expected to enhance performance, but as yet it has rarely been reported. Taking the MoO(3-x) nanosheet anode an example, for first time we demonstrate benefits OVs on SIB performance. Moreover, at deep-discharge conditions can be further promoted by ultrathin Al2O3 coating. A series measurements show that increase electric conductivity and Na-ion diffusion coefficient, promotion from coating lies effective reduction...

The implementation of an optical function into supercapacitors is innovative approach to make energy storage devices smarter and meet the requirements smart electronics. Here, it reported for first time that nickel–cobalt hydroxide on reduced graphene oxide can be utilized flexible electrochromic supercapacitors. A new straightforward one-step electrochemical deposition process introduced capable simultaneously reducing GO depositing amorphous Co(1−x)Ni x (OH)2 rGO. It shown rGO nanosheets...

Self-supported metallic nanopore arrays with highly oriented nanoporous structures are fabricated and applied as ideally nanostructured electrodes for supercapacitor applications. Their large specific surface area can ensure a high capacitance, their stable structure facilitate ion transport.

In this Letter, an innovative technique is reported to control the fabrication of free-standing MnO2 nanotube and nanowire arrays. The synthesis based on a three-step process, using porous anodic aluminum oxide as template, enables selective vertically aligned nanotubes or nanowires large areas. as-prepared arrays are investigated electrode materials for supercapacitor applications show good electrochemical performance with specific capacitances 210 F g−1 at 1.9 A 231 0.5 g−1, respectively....

Due to the unique advantages of Pt, it plays an important role in fuel cells and microelectronics. Considering fact that Pt is expensive metal, a major challenging point nowadays how realize efficient utilization Pt. In this paper, cost‐effective atomic layer deposition (ALD) process with low N 2 filling step introduced for realizing well‐defined nanotube arrays anodic alumina nano‐porous templates. Compared conventional ALD growth much fewer cycles shorter precursor pulsing time are...

The structure of graphene oxide (GO) is a matter discussion. While established GO models are based on functional groups attached to the carbon framework, another frequently used model claims that consists two components, slightly oxidized core and highly molecular species, oxidative debris (OD), adsorbed it. Those adsorbents claimed be origin for optical properties GO. Here, we examine this by preparing with low degree functionalization, combining it OD studying both components their...

Innovative carbon coating on nano-porous anodic aluminum oxide templates enables coatings dense self-supported nanostructured arrays in a reverse manner for applications energy devices (<italic>e.g.</italic>, supercapacitors).

A new approach to enhance surface plasmon resonance (SPR) performance by degenerating the quadrupole and dipole SPR modes of highly ordered Ag nanoparticle arrays is proposed. The degenerate reason confirmed originate from variation refractive index in different wavelengths. plasmonic strengthen SPR, which improves photocurrent photocatalytic activity this incorporated system. As a service our authors readers, journal provides supporting information supplied authors. Such materials are peer...

ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionCorrection to Controllable Disorder Engineering in Oxygen-Incorporated MoS2 Ultrathin Nanosheets for Efficient Hydrogen EvolutionJunfeng Xie, Jiajia Zhang, Shuang Li, Fabian Grote, Xiaodong Hao Ruoxing Wang, Yong Lei, Bicai Pan, and Yi Xie*Cite this: J. Am. Chem. Soc. 2014, 136, 4, 1680Publication Date (Web):January 14, 2014Publication History Published online14 January 2014Published inissue 29...

Abstract Graphene production by wet chemistry is an ongoing scientific challenge. Controlled oxidation of graphite introduces oxo functional groups; this material can be processed and converted back to graphene reductive defunctionalization. Although thermal processing yields conductive carbon, a ruptured undefined carbon lattice produced as consequence CO 2 formation. This process not understood, but it believed that accessible. Here, we thermally oxo‐functionalized (oxo‐G) with low (4–6 %)...

Abstract The utilization of oxygen vacancies (OVs) in sodium ion batteries (SIBs) is expected to enhance performance, but as yet it has rarely been reported. Taking the MoO 3− x nanosheet anode an example, for first time we demonstrate benefits OVs on SIB performance. Moreover, at deep‐discharge conditions can be further promoted by ultrathin Al 2 O 3 coating. A series measurements show that increase electric conductivity and Na‐ion diffusion coefficient, promotion from coating lies...

Resistive switching random access memories (RRAM) have attracted great scientific and industrial attention for next generation data storage because of their advantages nonvolatile properties, high density, low power consumption, fast writing/erasing speed, good endurance, simple small operation system. Here, by using a template-assisted technique, we demonstrate three-dimensional highly ordered vertical RRAM device array with density as that the nanopores template (10(8)-10(9) cm(-2)), which...

Main text An indirect comparison of the standards for reference air kerma rate 192 Ir high dose (HDR) brachytherapy sources Physikalisch-Technische Bundesanstalt (PTB), Germany, and Bureau International des Poids et Mesures (BIPM) was carried out at PTB in May 2023. The result, based on calibration coefficients a transfer standard expressed as ratio BIPM rate, is 1.0022 with combined uncertainty 0.0101. To reach main this paper, click Final Report . Note that which appears Appendix B key...

The increasing share of renewable energies as well the age structure thermal generation stack lead to big changes in European energy system. This paper describes a method for determining market prices electricity based on cost-minimal power plant dispatch and different mark-ups. Thus, influences these mark-ups simulated are estimated. Exemplary results shown Germany backtesting scenario year 2014 future 2024. compared historical price patterns show better match with historic prices, but also...

Heteroatom-doped graphene attracted tremendous attention because of advanced electrocatalytic properties, for example, oxygen reduction. However, the role atoms as heteroatoms in should be explored more deeply. Here, we used statistical Raman spectroscopy single-layer material analysis and found that regiochemistry close to vacancy defects plays a decisive role. Accordingly, possess guiding effect on introduction functional groups those defect-sites. After addition oxo-groups defects,...

Abstract Functionalization of pristine graphene by hydrogen and fluorine is well studied, resulting in graphane fluorographene structures. In contrast, functionalization with iodine has not been reported. Here, the using photochemical activation presented, which thermally reversible at 400 °C. Additional dispersive dominant Raman modes that are probed resonance spectroscopy observed. Additionally, iodinated Kelvin probe force microscopy transport measurements showing p‐doping surpassing...

Article Farbätzung und Farbbildanalyse — Ein Weg zur Charakterisierung von Gefügen innovativer Gusswerkstoffe / Colour Etching and Coloured Image Analysis - A Way of Characterising the Microstructures Innovative Cast Materials was published on August 1, 2000 in journal Practical Metallography (volume 37, issue 8).

Due to ambitious climate targets, an upcoming change from fossil-fueled renewable power generation is expected. As a consequence of the unpredictable nature relevant influence factors, further development system clouded by uncertainties. Under these circumstances, future path remains vague. Hence, this paper describes method determine considering all The importance incorporating uncertainties as unavoidable factor in planning process demonstrated exemplary investigations covering European...