Chemical Research in Toxicology
DOI: 10.1021/acs.chemrestox.3c00166
[ASAP] Correction for Extrinsic Background in Raman Hyperspectral Images
Analytical Chemistry
DOI: 10.1021/acs.analchem.3c01406
[ASAP] A Review on the Recent Applications of Deep Learning in Predictive Drug Toxicological Studies
Chemical Research in Toxicology
DOI: 10.1021/acs.chemrestox.2c00375
[ASAP] New Insights into the Cooperativity and Dynamics of Dimeric Enzymes
Chemical Reviews
DOI: 10.1021/acs.chemrev.3c00042
[ASAP] Identification and Detection of Intracellular Reactive Sulfur Species Using a Reaction-Mediated Dual-Recognition Strategy
Analytical Chemistry
DOI: 10.1021/acs.analchem.3c02094
Comparative Life Cycle Assessment and Exergy Analysis of Coal‐ and Natural Gas‐Based Ammonia Production
Environmental and efficiency impacts of ammonia production based on coal and natural gas systems are compared in a comprehensive life cycle assessment analysis. Natural gas, also being a cleaner-burning fossil fuel, demonstrates higher energy and exergy efficiencies compared to anthracite coal, resulting in a superior net power generation rate. The advantages of natural gas over coal are highlighted.
Abstract
A comprehensive life cycle assessment (LCA) analysis of ammonia production is presented, focusing on the comparison between natural gas-based and coal-based processes. Ammonia production is associated with high energy consumption and significant carbon dioxide (CO2) emissions. The objective of this research is to identify key processes and parameters within the ammonia synthesis industry and provide recommendations for cleaner and more sustainable development. Exergy analysis is performed to assess the efficiency of ammonia production technologies and determine optimal operating conditions. Natural gas-based ammonia production has lower environmental impacts compared to coal-based production in most categories, except for ionizing radiation. Natural gas, being a cleaner-burning fossil fuel, produces fewer greenhouse gas emissions and other air pollutants. However, it is essential to address the issue of ionizing radiation in natural gas-based processes. The potential for more efficient technologies and the importance of removing sulfur and other impurities during the production process to optimize catalyst performance are highlighted.
Cobalt Hydroxide Spindle Nanosheet Amorphous Electrocatalysts via In‐Situ Fast Reduction Release/Oxidization Mechanistic Method for Efficient Overall Water Electrolysis
Co(OH)2 is an excellent bifunctional electrocatalyst for overall water splitting at 1.64 V, which competes with state-of-art couples Pt−C//IrO2 (1.63 V). A novel preparation method, in-situ fast reduction release/oxidization mechanistic way to obtain a spindle nanosheet electrocatalyst is reported.
Abstract
Water electrolysis focused with electricity or sunlight is one of the sustainable methods to produce hydrogen; this helps to address the global energy demand whereas sluggish OER and HER kinetic barriers hamper this process. Here, we report an earth abundant Co(OH)2 spindle nanosheet electrocatalyst synthesized via surfactant with boron-assisted release/oxidize mechanistic process and employed it as a bifunctional electrocatalyst (OER/HER) with small overpotential (258 mV/156 mV), low Tafel slope (78 mV dec−1/71 mV dec−1), higher turnover frequency (0.235 s−1/0.100 s−1) and low charge transfer resistance (4.7 Ω). The higher electrochemical active surface area (45 cm2) of the catalyst exploits the potential electrocatalyst nature with overall cell voltage 1.64 V at 10 mA cm−2.
[ASAP] Spatio-Temporal Analysis of Anesthetics in Mice by Solid-Phase Microextraction: Dielectric Barrier Discharge Ionization Mass Spectrometry
Analytical Chemistry
DOI: 10.1021/acs.analchem.3c02123
[ASAP] Emission Onset Time-Adjustable Chemiluminescent Gold Nanoparticles with Ultrastrong Emission for Smartphone-Based Immunoassay of Severe Acute Respiratory Syndrome Coronavirus 2 Antigen
Analytical Chemistry
DOI: 10.1021/acs.analchem.3c02240
Controlled Supramolecular Assemblies of Chiral Cyclometalated Gold (III) Amphiphiles in Aqueous Media
The first chiral gold (III) amphiphile enables chiral supramolecular assembly in aqueous media, confirmed by circular dichroic and electron microscopy, with potential supramolecular helicity enhancement controlled by packing parameters of the amphiphilic design. The resulting chiral supramolecular assembly shows good cytocompatibility.
Abstract
Gold (III) cyclometalated based amphiphiles in aqueous media have been revealed with excellent supramolecular transformations to external stimuli to open new pathways for soft functional material fabrications. Herein, we report a new chiral cyclometalated gold (III) amphiphile (GA) assembling into lamellar nanostructures in aqueous media confirmed with transmission electron microscopy (TEM). Counterion exchange with D-, L-, or racemic-camphorsulfonates features the significant supramolecular helicity enhancements, enabling transformations of GA from lamellar structure to vesicles and to nanotubes with multi-equivalents of counterion. The limited cytotoxicity of GA in aqueous media exhibits good biocompatibility.