Results 81 to 90 of about 51,586 (326)

Additively Manufactured Binder‐Free Electrodes for Supercapacitors

open access: yesBatteries &Supercaps, EarlyView.
The study presents an innovative manufacturing process for electrodes in supercapacitors. The masked stereolithography method is used to produce electrodes that do not require a binder or metal foil. The printed electrodes have a microporous charter. Electrochemical measurements show that the additively manufactured electrodes behave in the same way as
Johannes Heumann   +6 more
wiley   +1 more source

Origin and Role of Reactive Oxygen Species in UV‐PUDEL Irradiation of Platinum Nanoparticles: Effects on Surface Groups and Electrochemical Activity

open access: yesChemCatChem, EarlyView.
Pulsed Laser Defect Engineering in Liquid (PUDEL) of platinum nanoparticles with UV‐laser pulses in a flat liquid jet leads to the formation of reactive oxygen species and subsequent increase of the nanoparticle zeta potential (surface charge density) and enhancemend of the catalytic activity.
Nico G. Koch   +6 more
wiley   +1 more source

Sustainable One‐Pot Synthesis of N‐Substituted Pyrroles Using a Multifunctional Cobalt‐Based Catalyst

open access: yesChemCatChem, EarlyView.
The one‐pot synthesis of N‐substituted pyrroles from nitrobenzene and 2,5‐hexanodione is first ever reported with >99% conversion and >99% chemoselectivity, in a green solvent, using a non‐noble metal‐based catalyst and hydrogen as a reductant under mild reaction conditions simultaneously.
Jose Luis del Río‐Rodríguez   +3 more
wiley   +1 more source

Alexander von Humboldt’s ideas on volcanism and their influence on Russian scientists

open access: yesHiN - Alexander von Humboldt im Netz. Internationale Zeitschrift für Humboldt-Studien, 2005
Article in English, Abstract in English.The article provides historical background for Alexander von Humboldt’s expedition into Russia in 1829. It includes information on Humboldt’s works and publications in Russia over the course of his lifetime, as ...
Alexander Zemtsov
doaj  

Khanneshin - the Afghan carbonatite volcano, discovered in the office

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2017
The pétrographie and mineralogical laboratory study of the rock samples and the analysis of the geological setting in the sites of their collection (South Afghanistan) allowed suggesting the presence of the carbonatite volcano there.
B. Ya. Vikhter
doaj   +1 more source

Regional distribution of volcanism within the North Atlantic Igneous Province

open access: yesSpecial Publications, 2017
An overview of the distribution of volcanic facies units was compiled over the North Atlantic region. The new maps establish the pattern of volcanism associated with breakup and the initiation of seafloor spreading over the main part of the North ...
Jim Á Horni   +8 more
semanticscholar   +1 more source

Cathode Materials for Proton Exchange Membrane Fuel Cells: From Metal and Metal Composite Catalysts to Carbon‐Supported Hybrids in Oxygen Reduction Reaction

open access: yesChemElectroChem, EarlyView.
This review highlights recent progress in the development of electrocatalysts for the oxygen reduction reaction in proton exchange membrane fuel cells (PEMFCs). Particular focus is given to structure–activity relationships, active site identification, and the role of noble and non‐noble metals, with insights into synthetic strategies and performance in
Claudia Garcés‐Barría   +5 more
wiley   +1 more source

Monitoring and Modeling the Rapid Evolution of Earth's Newest Volcanic Island: Hunga Tonga Hunga Ha'apai (Tonga) Using High Spatial Resolution Satellite Observations

open access: yesGeophysical Research Letters, 2018
We have monitored a newly erupted volcanic island in the Kingdom of Tonga, unofficially known as Hunga Tonga Hunga Ha'apai, by means of relatively frequent high spatial resolution (~50 cm) satellite observations.
J. B. Garvin   +6 more
doaj   +1 more source

40Ar-39Ar geochronology and petrogenesis of postcollisional trachytic volcanism along the İzmir-Ankara-Erzincan Suture Zone (NE, Turkey)

open access: yes, 2018
The obliteration of the Neo-Tethyan Ocean and collision of the microplates along the northern part of Turkey led to the development of the Izmir-Ankara-Erzincan suture zone (IAESZ).
G. Göçmengil   +3 more
semanticscholar   +1 more source

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