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An electrochemical nitrogen reduction reaction (NRR) could provide an alternative pathway to the Haber-Bosch process for clean, sustainable, and decentralized NH production when it is coupled with renewably derived electricity sources. Developing an electrocatalyst that overcomes sluggish kinetics due to the challenges associated with N adsorption and cleavage and that also produces NH with a reasonable yield and efficiency is an urgent need. Here, we engineer the size and density of pores in the walls of hollow Au nanocages (AuHNCs) by tuning their peak localized surface plasmon resonance (LSPR); in this way, we aim to enhance the rate of electroreduction of N to NH. The interdependency between the pore size/density, the peak LSPR position, the silver content in the cavity, and the total surface area of the nanoparticle should be realized for further optimization of hollow plasmonic nanocatalysts in electrochemical NRRs.
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http://dx.doi.org/10.1021/acs.jpclett.8b02188 | DOI Listing |
Nanotechnology
September 2025
Shanghai Polytechnic University, No. 2360 Jinhai Road, Shanghai 201209, P.R. China, Shanghai, Shanghai, 201209, CHINA.
A series of Ni-MOF materials were synthesized by a one-step solvothermal method under different reaction conditions, including metal source, organic ligand, reaction time and reaction temperature. The results demonstrated that the Ni-MOFs synthesized with Ni(NO3)2•6H2O as the metal source had higher crystallinity and a more uniform crystalline structure than those with NiCl2•6H2O. Different organic ligands led to the formation of Ni-MOFs in various morphologies.
View Article and Find Full Text PDFLangmuir
September 2025
Laboratory of Electrochemistry-Corrosion, Metallurgy and Inorganic Chemistry, Faculty of Chemistry, USTHB, BP 32, 16111, Algiers, Algeria.
Azo dyes, prevalent in various industries, including textile dyeing, food, and cosmetics, pose significant environmental and health risks due to their chemical stability and toxicity. This study introduces the synthesis and application of a copper hydrogen-π-bonded benzoate framework (Cu-HBF) and its derived marigold flower-like copper oxide (MFL-CuO) in a synergetic adsorption-photocatalytic process for efficiently removing cationic azo dyes from water, specifically crystal violet (CV), methylene blue (MB), and rhodamine B (RhB). The Cu-HBF, previously available only in single crystal form, is prepared here as a crystalline powder for the first time, using a low-cost and facile procedure, allowing its application as an adsorbent and also serving as a precursor for synthesizing well-structured copper oxide (MFL-CuO).
View Article and Find Full Text PDFJ Phys Chem B
September 2025
National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 11221, Taiwan, ROC.
The synthesis of -tetrakis(3,4,5-trimethoxyphenyl)porphyrin [HT(3,4,5-OCH)PP] and cobalt(II) -tetrakis(3,4,5-trimethoxyphenyl)porphyrin [Co(T(3,4,5-OCH)PP)] has been successfully accomplished. The oxidation properties of [Co(T(3,4,5-OCH)PP)] have been assessed through UV-vis, NMR, and EPR techniques. It can be seen in the UV-vis spectrum that adding SbCl caused extra peaks to appear at 674 nm, which means that a π-cation radical was formed.
View Article and Find Full Text PDFAnal Chem
September 2025
Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing 210023, P. R. China.
Electroactive bacteria (EAB) hold great promise for the development of electrochemical biosensors given their unique ability to transfer electrons extracellularly via specialized pathways, a process termed extracellular electron transfer (EET). Ongoing research aims to overcome current limitations and fully harness the potential of EABs for high-performance biosensing applications. Herein, we report the fabrication of an electrochemical microsensor based on biomineralized electroactive bacteria, specifically MR-1.
View Article and Find Full Text PDFDalton Trans
September 2025
Department of Chemistry, University of Zululand, Private Bag X1001, KwaDlangezwa 3880, South Africa.
To overcome the potential issue of active site blockage by surfactants in colloidal synthesis, alternative synthetic approaches must be explored. In this study, we investigated both solvent-free and colloidal thermolysis routes to synthesize nickel sulfides (NiS and NiS) using sulfur-based Ni complexes, [Ni(SCO(CH))] (Ni-Xan) and [Ni(SCN(CH))] (Ni-DTC) as precursors. The solvent-free decomposition of these complexes produced ligand-free NiS and NiS in the absence or presence of triphenylphosphine (TPP), respectively.
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