In situ visualizing reveals potential drive of lattice expansion on defective support toward efficient removal of nitrogen oxides.

As a sustainable and promising approach of removing of nitrogen oxides (NO), catalytic reduction of NO with H is highly desirable with a precise understanding to the structure-activity relationship of supported catalysts. In particular, the dynamic evolution of support at microscopic scale may play a critical role in heterogeneous catalysis, however, identifying the in situ structural change of support under working condition with atomic precision and revealing its role in catalysis is still a grand challenge. Herein, we visually capture the surface lattice expansion of WO support in Pt-WO catalyst induced by NO in the exemplified reduction of NO with H using in situ transmission electron microscopy and first reveal its important role in enhancing catalysis.

Performance of Full-Component Coal Gasification Fine Slag: High-Value Utilization as Reinforcing Material in Styrene-Butadiene Rubber (ESBR) for Replacing Carbon Black.

Ultrafine, highly active coal gasification slag (HCGS) was produced via a sustainable, green dry-ball-milling method. Coal gasification fine slag (CGS), a potential environmental pollutant, was used as a new source of rubber filler without pre-treatment, enabling waste utilisation. HCGS was added to styrene-butadiene rubber (ESBR) composites, and the effects of HCGS and the filler content on the mechanical and thermal stabilities of SBR were evaluated.

Insight into the effect of chemical structure for microbial lignite methanation.

The chemical structure of lignite plays a fundamental role in microbial degradation, which can be altered to increase gas production. In this study, the structural changes in lignite were analyzed by conducting pretreatment and biomethane gas production experiments using crushing and ball milling processes, respectively. The results revealed that different particle size ranges of lignite considerably influence gas production.

Enhanced hydrophobic ZSM-5 with high capacity for toluene capture under high-humidity conditions.

Industrial volatile organic compounds (VOCs) have the characteristics of large displacement and high humidity. The problem of water resistance of the adsorbent in treating VOCs by adsorption method under high humidity conditions needs to be solved urgently. Herein, methyl triethoxysilane (CHSi(CHO)) and methyl trimethoxysilane (CHSi(CHO)) are used for hydrophobic modification of ZSM-5, and its adsorption properties for toluene are studied under high-humidity conditions.

In situ formation of cocatalytic sites boosts single-atom catalysts for nitrogen oxide reduction.

Nitrogen oxide (NO) pollution presents a severe threat to the environment and human health. Catalytic reduction of NO with H using single-atom catalysts poses considerable potential in the remediation of air pollution; however, the unfavorable process of H dissociation limits its practical application. Herein, we report that the in situ formation of Pt cocatalytic sites (which are stabilized by Pt-Ti bonds) over Pt/TiO significantly increases NO conversion by reducing the energy barrier of H activation.

Mechanistic insights into the chemical structural changes of lignite on potential formation of the polycyclic aromatic hydrocarbons.

Polycyclic aromatic hydrocarbons (PAHs) generated during lignite combustion and gasification are highly carcinogenic, teratogenic, and mutagenic. Leveraging solvent extraction without damaging the macromolecular structure of lignite could help better understand the chemical structure and further clarify the possible source of PAHs, and the possibility of their elimination, thereby improving lignite utilization efficiency. In this study, methanol, ethanol, dichloromethane, and n-hexane were used to extract the feedstock at room temperature, and the constituents of the extracts were analyzed using GC-MS.

Wood-Derived High-Mass-Loading MnO Composite Carbon Electrode Enabling High Energy Density and High-Rate Supercapacitor.

The simple design of a high-energy-density device with high-mass-loading electrode has attracted much attention but is challenging. Manganese oxide (MnO ) with its low cost and excellent electrochemical performance shows high potential for practical application in this regard. Hence, the high-mass-loading of the MnO electrode with wood-derived carbon (WC) as the current collector is reported through a convenient hydrothermal reaction for high-energy-density devices.

Enhanced localized dipole of Pt-Au single-site catalyst for solar water splitting.

Solar water splitting is regarded as holding great potential for clean fuels production. However, the efficiency of charge separation/transfer of photocatalysts is still too low for industrial application. This paper describes the synthesis of a Pt-Au binary single-site loaded g-CN nanosheet photocatalyst inspired by the concept of the dipole.

The Role of Alkali Metal in α-MnO Catalyzed Ammonia-Selective Catalysis.

The unexpected phenomenon and mechanism of the alkali metal involved NH selective catalysis are reported. Incorporation of K (4.22 wt %) in the tunnels of α-MnO greatly improved its activity at low temperature (50-200 °C, 100 % conversion of NO vs.