Results 31 to 40 of about 746 (208)

Adsorption‐Engineered Hydrocarbon Ionomers for Durable Proton‐Exchange Membrane Fuel Cells

Advanced Materials, EarlyView.
Hydrocarbon ionomers suffer from oxidation‐driven interfacial degradation in PEM fuel cell cathodes, leading to catalyst instability. Here, adsorption‐engineered poly(fluorene) ionomers decouple interfacial anchoring from oxidative degradation, enabling strong catalyst–ionomer interactions while resisting electrochemical oxidation.
Heemin Park, Kate Chen, Su Min Ahn, Hengquan Guo, Cy Fujimoto, Jong‐Ho Choi, Lynda Amichi, Danah Kim, Seung Geol Lee, Xiaojing Wang, Jacob S. Spendelow, Sun Young Kang, Panagiotis Bexis, Eun Joo S. Park, Yu Seung Kim   +14 more
wiley   +1 more source

Iron Isotope Evidence for Heightened Primary Productivity Triggered by Hydrothermally Sourced Nutrients During Oceanic Anoxic Event 2

Geophysical Research Letters
Oceanic Anoxic Event 2 (OAE2, ∼94 Ma) represents a major global cycle perturbation in the mid‐Cretaceous greenhouse that is commonly attributed to increased biological primary productivity stimulated by elevated nutrients.
Binchen Li, Yong‐Xiang Li, Yuqi Li, Weiqiang Li   +3 more
doaj   +1 more source

A Review on Catalytic Nanostructured Electrodes for Wearable and Implantable Abiotic Glucose Fuel Cells

Advanced Science, EarlyView.
This review identifies current and future directions in abiotic nanostructured catalysts to develop reliable and sustainable glucose fuel cells to power the next generation of bioelectronic devices. ABSTRACT The global rise in incidence of chronic diseases has led to the demand for innovative solutions that help patients manage their conditions with ...
Asghar Niyazi, Hannah S. Leese, Benjamin Metcalfe, Mirella Di Lorenzo   +3 more
wiley   +1 more source

A new model for submarine volcanic collapse formation [PDF]

Geochemistry, Geophysics, Geosystems, 2003
Collapse pits and an associated suite of collapse‐related features that form in submarine lava flows are ubiquitous on the global mid‐ocean ridge crest. Collapse pits, the lava tube systems they expose, and lenses of talus created by the collapse process combine to produce a permeable region in the shallow ocean crust and are thought to contribute ...
Jennifer L. Engels, Margo H. Edwards, Daniel J. Fornari, Michael R. Perfit, Johnson R. Cann   +4 more
openaire   +1 more source

Atomic‐Level CuOx‐CoOx‐Pd Interfacial Engineering Enables Hierarchical Synergy for High‐Efficiency ORR Pathways and Boosted Power Output in Alkaline Fuel Cells

Advanced Science, EarlyView.
Atomically dispersed CuOx (CPCu‐1) forms isolated Cu–Ov sites that enable defect‐mediated O2 activation and fast electron/proton transfer via interfacial synergy. In contrast, thick CuOx clusters (CPCu‐10) promote a surface‐adsorption‐controlled pathway with intermediate accumulation, highlighting a mechanism switch from interfacial activation to ...
Yang‐Yang Hsu, Ching‐Hua Fan, Kuan‐Wen Wang, Kuang‐Kuo Wang, Nozomu Hiraoka, Hirofumi Ishii, Ting‐Shan Chan, Po‐Chun Chen, Tsan‐Yao Chen   +8 more
wiley   +1 more source

Towards the development of a genetic classification of mud volcanism: An analytical review [PDF]

Геосистемы переходных зон
Genetic characteristic of mud volcanism is essential for assessing and predicting mud volcanic hazard, as well as for studying the geo- and fluid dynamics of sedimentary sections.
Glazyrin, Evgeny A.
doaj   +1 more source

Evidence of a previously unrecorded local tsunami, 13 April 2010, Cook Islands: implications for Pacific Island countries [PDF]

Natural Hazards and Earth System Sciences, 2011
Tsunami hazard assessments for Pacific Islands Countries (PICs) tend to focus on subduction zone sources. It is generally recognised that while volcanic-related tsunamigenic sources exist, they are probably only of minor relevance to the overall ...
J. Goff
doaj   +1 more source

Volcano-tectonic structures of Mayotte’s upper submarine slope: insights from high-resolution bathymetry and in-situ imagery from a deep-towed camera

Comptes Rendus. Géoscience, 2022
Unlike subaerial volcanic activity, deep submarine eruptions are difficult to detect, observe and monitor. The objective of this paper is to describe a large and complex volcanic region, named the Horseshoe area, recently discovered at ${\sim }$1500 m ...
Puzenat, Valentine, Feuillet, Nathalie, Komorowski, Jean-Christophe, Escartín, Javier, Deplus, Christine, Bachèlery, Patrick, Berthod, Carole, Gurioli, Lucia, Scalabrin, Carla, Cathalot, Cécile, Rinnert, Emmanuel, Loubrieu, Benoît, Pierre, Delphine, Pitel-Roudaut, Mathilde, Tanguy, Nina, Fouquet, Yves, Jorry, Stephan J., Lebas, Elodie, Paquet, Fabien, Thinon, Isabelle   +19 more
doaj   +1 more source

Revealing the Nanoscale Morphology Changes of Polymer Electrolyte Membrane Fuel Cell Catalyst Layers due to Conditioning

Advanced Science, EarlyView.
We apply ex situ and in situ scanning transmission X‐ray microscopy to reveal the structural degradation of polymer electrolyte membrane fuel cell catalyst layers due to conditioning and thermal heating of the catalyst coated membrane. We observe a redistribution of the ionomer and carbon‐black in the catalyst layer, as well as nanoscale membrane ...
Spencer Lytle, Harsharaj B. Parmar, Jian Wang, Shohei Yamashita, Aimy Bazylak   +4 more
wiley   +1 more source

Submarine Instability Processes on the Continental Slope Offshore of Campania (Southern Italy)

GeoHazards
A revision of the submarine instability processes offshore the Campania region is presented herein based on the literature data and Multibeam bathymetric and seismic profiles previously acquired by the CNR ISMAR of Naples (Italy).
Gemma Aiello
doaj   +1 more source