Copper-based materials are promising for formaldehyde oxidation to produce hydrogen but suffer from degradation caused by soluble copper ions in alkaline electrolytes. In this report, a novel CuPd/CC alloy electrocatalyst is developed to address this issue. The catalyst drives formaldehyde oxidation at 0.2 V to produce a current density of 50 mA cm. Stability tests over 100 h show no significant decay in current density, and the copper ion concentration in the solution remains low at 10.7 μg L, almost ten times lower than that observed with copper foam electrodes under identical conditions (107.1 μg L). When used in direct formaldehyde fuel cells, the catalyst achieves an open-circuit voltage of 0.9 V and a peak power density of 100.0 mW mg. This study provides a new strategy for enhancing copper-based catalysts through alloying.
Copper-based materials are promising for formaldehyde oxidation to produce hydrogen but suffer from degradation caused by soluble copper ions in alkaline electrolytes. In this report, a novel CuPd/CC alloy electrocatalyst is developed to address this issue. The catalyst drives formaldehyde oxidation at 0.
The catalytic efficiency of M-H2tpda pincer complexes (M = Mn(I), Fe(II), Co(III)) in CO2 hydrogenation, emphasizing the role of transition metal center variability have been discussed. The DFT analysis demonstrates that complexes with low αR values form weaker M-H bonds, enhancing catalyst reactivity with the elongation of M-H bond. The analysis further displays excellent catalytic performance for Mn-H2tpda (ΔE = 20.
Rapid industrialization and the influx of human resources have led to the establishment of industrial complexes near urban areas, exposing residents to various air pollutants. This has led to a decline in air quality, impacting neighboring residential areas adversely, which highlights the urgent need to monitor air pollution in these areas. Recent advancements in technology, such as Solar Occultation Flux (SOF) and Sky Differential Optical Absorption Spectroscopy (SkyDOAS) used as remote sensing techniques and mobile extraction Fourier Transform Infrared Spectrometry (MeFTIR) used as an in situ technique, now offer enhanced precision in estimating the pollutant emission flux and identifying primary sources.
Emissions of volatile organic compounds (VOCs) such as benzene, toluene, xylene, styrene, hexane, tetrachloroethylene, acetone, acetaldehyde, formaldehyde, isopropanol, etc., increase dramatically with accelerated industrialization and economic growth. Most VOCs cause serious environmental pollution and threaten human health due to their toxic and carcinogenic nature.
Aldehydes have been proposed as important precursor species in new particle formation (NPF). Although formaldehyde (CHO) has minimal direct involvement in sulfuric acid (HSO) and water nucleation, it remains unclear whether its atmospheric aldol condensation product, hydroxyacetaldehyde (CHO), one of the simplest bifunctional oxygenated volatile organic compounds (OVOCs), plays a role in NPF. This study investigates both the aldol condensation of CHO and its role in NPF involving HSO and CHO through quantum chemical calculations and atmospheric cluster dynamics modeling.
