98%
921
2 minutes
20
Sulphidation of a CuNi alloy of Cu : Ni ratio 81 : 19 led to an exponential activity enhancement in the alkaline methanol oxidation reaction (MOR) by four fold due to an order of magnitude increase in the number of active Cu and Ni sites and improved charge transfer properties.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1039/d3cc05603a | DOI Listing |
J Hazard Mater
September 2025
Liaoning Key Laboratory for Chemical Clean Production, Liaoning Key Laboratory for Surface Functionalization of Titanium Dioxide Powder, Institute of Ocean Research, Institute Environmental Research, College of Chemistry and Material Engineering, Bohai University, Jinzhou, Liaoning 121013, China. El
The development of broad-spectrum remediation materials for soil heavy metals is an urgent problem in the environmental field. This study utilized oxygen-sulfur synergy sites in sulfonated cellulose/chitosan self-assembled gel (SMCG), which exhibited high affinity for Cu(II) and Ni(II), to induce and construct Cu-Ni bimetallic sulfides in situ. Through coupling with edge nucleation of Pb(II), Zn(II), and Cd(II), five heavy metals (Cu(II), Ni(II), Pb(II), Zn(II), and Cd(II)) were immobilized over the long term.
View Article and Find Full Text PDFJ Colloid Interface Sci
September 2025
Hubei Key Lab for Processing and Application of Catalytic Materials, Hubei Provincial Engineering Research Center of High Purity Raw Material Processing Technology of Electronic Materials, College of Chemistry and Chemical Engineering, Huanggang Normal University, Huanggang 437000, China. Electronic
The interface engineering strategy of hybridizing transition metal sulfides (TMSs) with other electroactive materials has proven to be a powerful strategy to exploit advanced electrode materials for supercapacitors (SCs). Herein, CuNiS nanospheres were grown directly onto carbon cloth (CC) by a single-step electrodeposition procedure, and the bimetallic selenide NiCoSe then was deposited over the CuNiS nanospheres to create a flexible CuNiS@NiCoSe hybrid electrode material with special core-shell architecture. The nanoflower-like hybrid structure not only increases the redox active sites but also provides short paths for electron/ion transport and improves redox reaction kinetics.
View Article and Find Full Text PDFEnviron Sci Process Impacts
April 2025
Department of Civil, Mining and Process Engineering, Namibia University of Science and Technology, Windhoek, Namibia.
Fine-grained dust from tailing storage facilities in abandoned sulfide-ore mining areas represents an important source of environmental contamination. Fine fractions (<48 μm and <10 μm) of tailings from three old mining sites situated along a climatic gradient from hot semiarid to cold desert conditions in Namibia were studied: Kombat (Cu-Pb-Zn; rainfall ∼500 mm), Oamites (Cu; ∼120 mm), Namib Lead & Zinc (Pb-Zn; ∼0 mm). Multi-method mineralogical and geochemical investigations were adopted to assess the binding and gastric bioaccessibility of the metal(loid)s and to evaluate the associated human health risks.
View Article and Find Full Text PDFEnviron Geochem Health
February 2025
Institute of Petrology and Structure Geology, Faculty of Science, Charles University, Albertov 6, Prague, 128 00, Czech Republic.
In historic mining towns, where mining activities were abandoned many decades or even centuries ago, legacy contaminations can be remobilized and redispersed, representing a threat for the environment and human health. This study focuses on urban soils (n = 19) in the town of Jihlava, the Czech Republic, one of the medieval centers of silver mining in central Europe. The basic geochemical characterization of the soils was combined with mineralogical investigations to understand the solid speciation of the metal(loid) contaminants, oral bioaccessibility tests, and exposure assessment.
View Article and Find Full Text PDFCurr Biol
November 2024
Department of Botany, Faculty of Science, Charles University, Prague 12800, Czech Republic; Division of Evolutionary Ecology, Institute of Ecology and Evolution, University of Bern, Bern 3012, Switzerland. Electronic address:
Live-bearing fish have repeatedly adapted to life in sulfidic hot springs. A new study finds consistent changes in morphology, physiology and gene expression but no repeated genomic adaptation. This raises further questions about genetic redundancy, polygenic adaptation and the broader significance of repeated adaptation in natural systems.
View Article and Find Full Text PDF