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Effective Nitrate Electroconversion to Ammonia Using an Entangled CoO/Graphene Nanoribbon Catalyst.
ACS Appl Mater Interfaces
December 2024
Institute of Chemistry, Federal University of Mato Grosso do Sul, Avenida Senador Filinto Muller 1555, Campo Grande, Mato Grosso do Sul 79074-460, Brazil.
There has been huge interest among chemical scientists in the electrochemical reduction of nitrate (NO) to ammonia (NH) due to the useful application of NH in nitrogen fertilizers and fuel. To conduct such a complex reduction reaction, which involves eight electrons and eight protons, one needs to develop high-performance (and stable) electrocatalysts that favor the formation of reaction intermediates that are selective toward ammonia production. In the present study, we developed and applied CoO/graphene nanoribbon (GNR) electrocatalysts with excellent properties for the effective reduction of NO to NH, where NH yield rate of 42.
View Article and Find Full Text PDFStudy on Efficient Operating Conditions for Bipolar Membrane Electrodialysis Using Different Ion Species and Anion-Exchange Membranes.
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December 2024
Graduate School of Science and Technology for Innovation, Yamaguchi University (YU), 2-16-1 Tokiwadai, Ube 755-8611, Japan.
To investigate efficient operating conditions for bipolar membrane electrodialysis (BMED), a comparison of current efficiency () and power intensity () was conducted using different anion-exchange membranes (AEMs) and salt solutions (NaCl and NaSO) as feed solutions in BMED. The results indicated that was higher and was lower for a commercial proton-blocking AEM (ACM) than for a standard AEM (ASE) when NaCl was used. This is because ASE has a higher water content than ACM, leading to greater H permeability, which reduces .
View Article and Find Full Text PDFAnion-Exchange Membranes' Characteristics and Catalysts for Alkaline Anion-Exchange Membrane Fuel Cells.
Membranes (Basel)
November 2024
Graduate Institute of Precision Engineering, National Chung Hsing University, Taichung City 402, Taiwan.
This work aims at the effects of anion-exchange membranes (AEMs) and ionomer binders on the catalyst electrodes for anion-exchange membrane fuel cells (AEMFCs). In the experiments, four metal catalysts (nano-grade Pt, PtRu, PdNi and Ag), four AEMs (aQAPS-S8, AT-1, X37-50T and X37-50RT) and two alkaline ionomers (aQAPS-S14 and XB-7) were used. They were verified through several technical parameters examination and cell performance comparison for the optimal selection of AMEs.
View Article and Find Full Text PDFStructural insights into the engagement of lysophosphatidic acid receptor 1 with different G proteins.
J Struct Biol
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Advanced Research Institute, Institute of Science Tokyo, 1-5-45 Yushima Bunkyo-ku 113-8510, Tokyo, Japan. Electronic address:
Lysophosphatidic acid (LPA) and sphingosine-1-phosphate (S1P) are bioactive lysophospholipids derived from cell membranes that activate the endothelial differentiation gene family of G protein-coupled receptors. Activation of these receptors triggers multiple downstream signaling cascades through G proteins such as Gi/o, Gq/11, and G12/13. Therefore, LPA and S1P mediate several physiological processes, including cytoskeletal dynamics, neurite retraction, cell migration, cell proliferation, and intracellular ion fluxes.
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Haematology Research, Murdoch Children's Research Institute, Melbourne, VIC, Australia.
Objectives: To determine if a priori standardization of outcome hemostatic definitions alone was adequate to enable useful comparison between two cohorts of pediatric extracorporeal membrane oxygenation (ECMO) patients, managed according to local practice and protocol.
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