In this work, we introduce for the first time an aqueous solution method followed by a selenization step to prepare Mn-doped CoSe nanosheets supported on nickel foam for the oxygen evolution reaction. These findings provide us highly efficient electrocatalysts instead of noble metal catalysts for the oxygen evolution reaction.
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http://dx.doi.org/10.1039/c9dt03108a | DOI Listing |
Mar Pollut Bull
January 2025
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China.
This study reconstructs the environmental history of Xincun Lagoon over the past 167 years using sediment core XCW, employing Cu/Zn as a proxy for redox changes. Time-series analysis of Cu/Zn ratios reveals a significant decline (linear regression slope = -0.00082, p < 0.
View Article and Find Full Text PDFPhys Rev Lett
December 2024
Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, No. 22 Hankou Road, Nanjing, Jiangsu 210093, People's Republic of China.
Water electrolysis suffers from electron transfer barriers during oxygen evolution reactions, which are spin-related for magnetic materials. Here, the electron transfer at the Fe_{64}Ni_{36}-FeNiO_{x}H_{y} interface is effectively accelerated when the electrode is heated to trigger the Invar effect in Fe_{64}Ni_{36} Invar alloy, providing more unoccupied orbitals as electron transfer channels without pairing energy. As a result of thermally stimulated changes in electronic states, Fe_{64}Ni_{36}/FeNiO_{x}H_{y} achieved a cascaded oxidation of the catalytic center and water.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Physical & Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune, Maharashtra 411008, India.
This work aims to deal with the challenges associated with designing complementary bifunctional electrocatalysts and a separator/membrane that enables rechargeable zinc-air batteries (RZABs) with nearly solid-state operability. This solid-state RZAB was accomplished by integrating a bifunctional electrocatalyst based on Ru-RuO interface nanoparticles supported on nitrogen-doped (N-doped) graphene (Ru-RuO/NGr) and a dual-doped poly(acrylic acid) hydrogel (d-PAA) electrolyte soaked in KOH with sodium stannate additive. The catalyst shows enhanced activity and stability toward the two oxygen reactions, i.
View Article and Find Full Text PDFHistochem Cell Biol
January 2025
Departamento de Diagnóstico en Patología y Medicina Oral, Facultad de Odontología, Universidad de La República, General Las Heras 1925, Montevideo, Uruguay.
The tumor microenvironment is an altered milieu that imposes multiple selective pressures leading to the survival and dissemination of aggressive and fit tumor cell subpopulations. How pre-tumoral and tumoral cells respond to changes in their microenvironment will determine the subsequent evolution of the tumor. In this study, we have subjected pre-tumoral and tumoral cells to coverslip-induced hypoxia, which recapitulates the intracellular hypoxia and extracellular acidification characteristic of the early tumor microenvironment, and we have used a combination of quantitative phase microscopy and epifluorescence to analyze diverse cellular responses to this altered environment.
View Article and Find Full Text PDFISME J
January 2025
Biological Oceanography, Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, 18119 Germany.
Dormancy is a wide-spread key life history trait observed across the tree of life. Many plankton species form dormant cells stages that accumulate in aquatic sediments and under anoxic conditions, form chronological records of past species and population dynamics under changing environmental conditions. Here we report on the germination of a microscopic alga, the abundant marine diatom Skeletonema marinoi that had remained dormant for up to 6871 ± 140 years in anoxic sediments of the Baltic Sea and resumed growth when exposed to oxygen and light.
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