Results 11 to 20 of about 3,251 (179)
The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces
Geophysical Monograph Series, Page 229-246., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Alexander J. Dickson +2 more
wiley +19 more sources
Advanced Science, EarlyView.An in situ characterization platform is established for water management and fault diagnosis in AEMFCs by employing the relaxation time method to analyze electrochemical impedance spectra. This approach identifies the characteristic frequency ranges of ionic, charge, and reactant transport resistances, enabling quantitative diagnosis of water transport
Haodong Huang +9 more
wiley +1 more source
Advanced Science, EarlyView.The seed‐mediation synthesis approach offers increased activity and stability for the PtNiIr nanocatalysts. It is designed as an oxygen reduction reaction catalyst in proton exchange membrane fuel cells (PEMFC), further enhanced by deposing the particles inside the porous carbon support material.
Lujin Pan +12 more
wiley +1 more source
Advanced Energy Materials, EarlyView.Pt/C catalysts differing only in the locality of the Pt nanoparticles, whether inside or outside of the pores of the same carbon support, are needed to study the effect of said locality. Depending on the carbon support used, nanoparticles inside the pores can show hindered accessibility and ORR performance.
Giovanni Ferro +8 more
wiley +1 more source
Advanced Energy Materials, EarlyView.Nonnoble transition‐metals (TMs) in PtCuNi/C catalysts have a dual influence in proton‐exchange membrane fuel cell cathode catalyst layer. While TMs act as a “sacrificial component” of PtCuNi/C, inhibiting Pt dissolution from the PtMx nanoparticles bearing the active sites, they promote the formation of separate catalysts and ionomer domains in the ...
Ricardo Sgarbi +16 more
wiley +1 more source
Advanced Energy Materials, EarlyView.FeMn(NbTa)2O6‐columbite is a sustainable and high‐performance bifunctional electrocatalyst for anion exchange membrane water electrolyzers, comparable to benchmark catalysts. In situ XAS and DFT analysis show Fe/Mn sites exhibit higher OER activity due to reduced overpotentials and favorable O→OOH energetics. The Nb/Ta sites facilitate charge transfer,
Patrick M. Bacirhonde +17 more
wiley +1 more source
Interior Morphology and Pore Structure in High Surface Area Carbon Catalyst Supports
Advanced Energy Materials, EarlyView.The interior structure of high surface area carbon supports for proton exchange membrane fuel cells is a major yet poorly characterized factor influencing performance and durability. Using full‐range electron tomography, pores and pathways within the supports are visualized in 3D.
Robin Girod, Vasiliki Tileli
wiley +1 more source
Advanced Energy Materials, EarlyView.Iron‐triad‐based materials are attracting attention for green hydrogen production via water electrolysis due to their favorable electronic and flexible chemical properties, enabling the tailoring of electrochemical performance. This review covers the basics of water electrolysis, challenges in catalyst evaluation, and recent advances in tuning iron ...
Jean Marie Vianney Nsanzimana +8 more
wiley +1 more source
Advanced Energy Materials, EarlyView.Herein, by employing a reference electrode, the durability of anion exchange membrane water electrolyzer (AEMWE) under intermittent condition is demonstrated to be governed by the stability of the cathode catalyst. By encapsulating NiMo catalyst with carbon shells, the oxidation‐induced irreversible transformation to inactive hydroxide is prevented ...
Sun Seo Jeon +13 more
wiley +1 more source
Advanced Energy and Sustainability Research, EarlyView.Fluorine‐free self‐standing anode microporous layers are fabricated and optimized for hydrocarbon catalyst‐coated membranes. The effects of carbon black, graphite, and acrylic binder in the microporous layer composition, on wetting behavior, permeability, electrical resistance, and electrochemical performance are investigated.
Koray Yildirim +3 more
wiley +1 more source