AI Article Synopsis
- The research aimed at reducing nitrate to nitrogen gas for improved water conservation, utilizing zero-valent iron (Fe) combined with bimetallic palladium (Pd) and copper (Cu) as a catalyst.
- X-ray photoelectron spectroscopy (XPS) was used to investigate the catalytic mechanism, revealing that Fe acts as the electron provider while Pd and Cu have unique, essential roles in the process.
- The reaction kinetics were characterized by first-order kinetics following the Langmuir-Hinshelwood model, with the Pd-Cu/graphene catalyst demonstrating superior catalytic performance over other tested carriers.
Article Abstract
The focus of this research was on the catalytic reduction of nitrate to nitrogen gas for the water conservation. Zero-valent iron (Fe) with bimetallic catalyst that carrier supported palladium (Pd) and copper (Cu) was innovatively applied in this study. First, XPS (X-ray photoelectron spectroscopy) analyses and experiments were conducted to study the mechanism of the catalytic reduction of nitrate. In the catalytic reaction, which is regarded as a stepwise process, Fe was the electron provider; Pd and Cu supported on carrier played indispensable but distinct roles. The kinetics suggested that the process was better reflected by first-order kinetics of the Langmuir-Hinshelwood model. Additionally, first-order kinetics of the catalytic reaction under the effect of catalysts with different carriers (SiO, silica gel, kaolin, diatomite, γ-AlO, graphene) were further studied. Pd-Cu/graphene catalyst showed higher catalytic performance compared with other catalysts.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1080/10934529.2021.1890496 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Bimetallic Nickel-Palladium Nanoparticles Supported on Multiwalled Carbon Nanotubes for Suzuki Cross-Coupling Reactions in Continuous Flow.
Ind Eng Chem Res
January 2025
Department of Chemistry, Physics, and Materials Science, Fayetteville State University, Fayetteville, North Carolina 28301, United States.
An efficient Suzuki cross-coupling reaction under continuous flow conditions was developed utilizing an immobilized solid supported catalyst consisting of bimetallic nickel-palladium nanoparticles (Ni-Pd/MWCNTs). In this process, the reactants can be continuously pumped into a catalyst bed at a high flow rate of 0.6 mL/min and the temperature of 130 °C while the Suzuki products are recovered in high steady-state yields for prolonged continuous processing.
View Article and Find Full Text PDFPorous 3d-4f Coordination Clusters for Selective Visible-Light Photocatalytic CO2 Reduction to CO.
Angew Chem Int Ed Engl
January 2025
Xi'an Jiaotong University, School of Chemical Engineering and Technology, CHINA.
We report herein two families of porous coordination clusters (PCCs) with 216 nuclearity (M120RE96 or PCC-216MR) and 300 nuclearity (Co144Gd156 or PCC-300CG). For the first family M could be either nickel or cobalt, and RE = Pr, Nd, Sm, Eu, and Gd; while the latter features the highest nuclearity of transition-rare earth metal clusters. Characterized by their cube-like, hollow structures, these clusters exhibit the ability to absorb N2 and CO2.
View Article and Find Full Text PDFElectrochemical deposition of bimetallic sulfides on novel BDD electrode for bifunctional alkaline seawater electrolysis.
Sci Rep
January 2025
FEMTO-ST Institute (UMR CNRS 6174), UBFC/UTBM. Site de Montbéliard, 90010, Belfort, France.
Seawater electrolysis is an ideal technology for obtaining clean energy-green hydrogen. Developing efficient bifunctional catalysts is crucial for hydrogen production through direct seawater electrolysis. Currently, metal substrates loaded with active catalysts are widely employed as electrodes for seawater electrolysis.
View Article and Find Full Text PDFTandem Catalysis for Plastic Depolymerization: In Situ Hydrogen Generation via Methanol APR for Sustainable PE Hydrogenolysis.
Angew Chem Int Ed Engl
January 2025
Seoul National University of Science & Technology, Department of Chemical and Biomolecular Engineering, 232 Gongneung-ro, 01811, Seoul, KOREA, REPUBLIC OF.
Depolymerizing plastic waste through hydrogen-based processes, such as hydrogenolysis and hydrocracking, presents a promising solution for converting plastics into liquid fuels. However, conventional hydrogen production methods rely heavily on fossil fuels, exacerbating global warming. This study introduces a novel approach to plastic waste hydrogenolysis that utilizes in situ hydrogen generated via the aqueous phase reforming (APR) of methanol, a biomass-derived chemical offering a more sustainable alternative.
View Article and Find Full Text PDFPdRu bimetallic nanoalloys with improved photothermal effect for amplified ROS-mediated tumor therapy.
Front Bioeng Biotechnol
January 2025
Department of Experimental Research and Guangxi Cancer Molecular Medicine Engineering Research Center and Guangxi Key Laboratory of Basic and Translational Research for Colorectal Cancer, Guangxi Medical University Cancer Hospital, Nanning, China.
An emerging strategy in cancer therapy involves inducing reactive oxygen species (ROS), specifically within tumors using nanozymes. However, existing nanozymes suffer from limitations such as low reactivity, poor biocompatibility, and limited targeting capabilities, hindering their therapeutic efficacy. In response, the PdRu@PEI bimetallic nanoalloys were constructed with well-catalytic activities and effective separation of charges, which can catalyze hydrogen peroxide (HO) to toxic hydroxyl radical (·OH) under near-infrared laser stimulation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!