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Activity and stability origin of core-shell catalysts: unignorable atomic diffusion behavior.
Chem Sci
January 2025
Interdisciplinary Research Center for Sustainable Energy Science and Engineering (IRC4SE2), School of Chemical Engineering, Zhengzhou University Henan 450001 China
The exceptional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) performances of core-shell catalysts are well documented, yet their activity and durability origins have been interpreted only based on the static structures. Herein we employ a NiFe alloy coated with a nitrogen-doped graphene-based carbon shell (NiFe@NC) as a model system to elucidate the active structure and stability mechanism for the ORR and OER by combining constant potential computations, molecular dynamic simulations, and experiments. The results reveal that the synergistic effects between the alloy core and carbon shell facilitate the formation of Fe-N-C active sites and replenish metal sites when central metal atoms detach.
View Article and Find Full Text PDFFerroelectric polarization is considered to be an effective strategy to improve the oxygen evolution reaction (OER) of photoelectrocatalysis. The primary challenge is to clarify how the polarization field controls the OER dynamic pathway at a molecular level. Here, electrochemical fingerprint tests were used, together with theoretical calculations, to systematically investigate the free energy change in oxo and hydroxyl intermediates on TiO-BaTiO core-shell nanowires (BTO@TiO) upon polarization in different pH environments.
View Article and Find Full Text PDFDifferent p-block elements induce C[111] octahedral distortion in titanium to generate an intense nonlinear effect.
Chem Sci
January 2025
Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University Nanning Guangxi 530004 China
Acentric crystalline materials are the cornerstone of numerous cutting-edge technologies and have been highly sought-after, but they are difficult to construct controllably. Herein, by introducing a new p-block element to break the symmetrical environment of the d transition metal in the centric matrix TiTeO, a novel acentric tellurite sulfate, namely Ti(TeO)(SO), was successfully constructed. In its structure, two types of p-block element-centered oxo-anionic groups, [TeO] and [SO], endow [TiO] with an out-of-center distortion along the local C[111] direction, which is rare in titanium oxides containing a lone-pair cation.
View Article and Find Full Text PDFBiodistribution of Polymeric Nanoparticles following in utero Delivery to a Nonhuman Primate.
Biomed Hub
December 2024
Departments of Surgery, Yale School of Medicine, New Haven, CT, USA.
Introduction: Monogenic diseases can be diagnosed before birth. Systemic fetal administration of nanoparticles (NPs) grants therapeutic access to developing stem cell populations impacted by these classes of disease. Delivery of editing reagents in these NPs administered before birth has yielded encouraging results in preclinical mouse models of monogenic diseases.
View Article and Find Full Text PDF(Omphalotaceae, Agaricales), A New Species from Danang, Vietnam.
Mycobiology
December 2024
Faculty of Chemical Technology and Environment, University of Technology and Education, The University of Danang, Danang, Vietnam.
During the collection of macrofungi resources in Son Tra Nature Reserve, Danang, Vietnam, two fungal specimens of the genus , designated as M34295 and M3457, living on dead still-attached branches of L. at an elevation around 360 m above the sea level were recorded. The morphological characteristics of the specimens shared some common characteristics with spp.
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