Results 91 to 100 of about 51,586 (326)

Understanding the Operation of a Gas Diffusion Electrode Setup for the Oxygen Reduction Reaction: Experiment versus 3D Multiphysics Modeling

open access: yesChemElectroChem, EarlyView.
Multiphysics simulations highlight the significant impact of partial water flooding of the catalyst layer on the shape of the gas diffusion electrode (GDE) polarization curves and suggest that mass‐transport limitation inside the catalyst layer may be limiting in a GDE setup, specifically at high current density.
Erwan Tardy   +5 more
wiley   +1 more source

Transient slab flattening beneath Colombia

open access: yesGeophysical Research Letters, 2017
Subduction of the Nazca and Caribbean Plates beneath northwestern Colombia is seen in two distinct Wadati Benioff Zones, one associated with a flat slab to the north and one associated with normal subduction south of 5.5°N.
L. S. Wagner   +5 more
doaj   +1 more source

Volcanism in slab tear faults is larger than in island-arcs and back-arcs

open access: yesNature Communications, 2017
Subduction-transform edge propagators are lithospheric tears bounding slabs and back-arc basins. The volcanism at these edges is enigmatic because it is lacking comprehensive geological and geophysical data.
L. Cocchi   +3 more
semanticscholar   +1 more source

Pnictogenation‐Driven Exsolution of Size‐Tunable Ru Electrocatalysts in Conductive Matrices to Reinforce Inner‐Sphere‐Mechanism‐Assisted Electronic Coupling

open access: yesCarbon Energy, EarlyView.
Here, we report an exsolution route to size‐tunable Ru‐metal nanocatalysts embedded in conductive metal pnictogenide matrices via the gas‐phase pnictogenation reaction of Ni2Fe1−xRux‐LDH. The inner‐sphere‐mechanism‐assisted interfacial electronic coupling between exsolved single‐atom nanocatalysts and conductive nickel iron pnictogenide matrices led to
Dong Hoon Sun   +3 more
wiley   +1 more source

FORMATION CONDITIONS OF AGATES [PDF]

open access: yesМинералогия, 2017
Agates are formed at various temperatures, which covers a wide range from those of basaltic and andesitic melts (above 1100 °С) to several tens of centigrade, but at rather low pressures. Their formation in liquid mafic magmas is indicated by correlation
I.N. Kigai
doaj  

Going from Pt to PGM‐free Catalysts: Effects of Ink Compositions on PEM Water Electrolysis

open access: yesChemPhysChem, Volume 26, Issue 6, March 15, 2025.
Optimisation of cathode ink formulations regarding the ratio between catalyst, carbon and binder results in a boost in PEM water electrolysis performance. The optimisation can be transferred from pentlandites to platinum and selenide catalysts, wherein the metal chalcogenides show a stronger performance enhancement.
Janna Wierper   +7 more
wiley   +1 more source

Stress Controls of Monogenetic Volcanism: A Review

open access: yesFrontiers in Earth Science, 2016
The factors controlling the preparation of volcanic eruptions in monogenetic fields are still poorly understood. The fact that in monogenetic volcanism each eruption has a different vent suggests that volcanic susceptibility has a high degree of ...
J. Martí   +4 more
semanticscholar   +1 more source

Understanding the Active Site Structures and Achieving Catalytic Activity Tuning of Atomically Dispersed FeN4 Sites for Oxygen Reduction Reaction

open access: yesChemPhysChem, EarlyView.
This review summarizes the recent advances regarding FeNC catalyst for oxygen reduction reaction (ORR). The fundamental aspects regarding active site structures, reaction mechanisms, as well as catalytic activity tuning, are discussed. Future directions regarding the active site dynamic evolution during ORR, impact of the solvation environment and ...
Jiayi Xu   +3 more
wiley   +1 more source

Prototype Validation of a Large‐Scale CO2‐to‐Formate Zero‐Gap Electrolyzer

open access: yesChemSusChem, EarlyView.
Overall, the scaled‐up zero‐gap prototype exhibits superior formate production performance compared to the lab‐scale filter press reactor, although it operates at higher cell voltages. These findings confirm the scalability of this technology. The scale‐up of gas‐phase CO2 electroreduction to formate is crucial for its industrial application but ...
Jose Antonio Abarca   +6 more
wiley   +1 more source

Editorial: Links between tectonics, fault evolution and surface processes in extensional systems

open access: yesFrontiers in Earth Science, 2022
Frank Zwaan   +4 more
doaj   +1 more source

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