Low-Coordinated Polysulfide Species on Metal Sulfide Enabled Superior Gaseous Mercury Removal from Natural Gas.

The pursuit of efficient natural gas utilization is inherently linked to thorough purification of its contaminants. Traditional purification techniques, while adept at removing sulfur-containing acid gases (e.g.

Oxygen-Mediated Hydrogen Spillover Promotes Stable Synthesis of Vinyl Chloride on Ru Single-Atom Catalysts.

Ru single-atom catalysts hold great promise for the robust synthesis of vinyl chloride through acetylene hydrochlorination. However, the easy over-chlorination of Ru atoms during reaction suppress the catalytic activity and stability. Herein, we have synthesized an oxygen doped Ru single-atom catalyst by a sequential oxygen etching strategy, which delivers the remarkable yield of vinyl chloride monomer (>99.

Associations of Physical Activity with Long-Term Mortality Among Peripheral Artery Disease Patients: A Population-Based Cohort Study.

Background: To investigate the relationship between physical activity and risk of all-cause and cardiovascular disease (CVD) mortality in patients with peripheral artery disease (PAD).

Methods: We recruited 561 PAD cases of National Health and Nutrition Examination Survey from 1999 to 2004 and linked mortality data through December 31, 2019. We explored the effect of aerobic physical activity and muscle-strengthening activity on the risk of all-cause and CVD mortality employing cox proportional hazard ratios (HRs) with 95% confidence intervals (CIs) from 1999 to 2019.

Enhanced Catalytic Oxidation Reactivity over Atomically Dispersed Pt/CeO Catalysts by CO Activation.

The elevation of the low-temperature oxidation activity for Pt/CeO catalysts is challenging to meet the increasingly stringent requirements for effectively eliminating carbon monoxide (CO) from automobile exhaust. Although reducing activation is a facile strategy for boosting reactivity, past research has mainly concentrated on applying H as the reductant, ignoring the reduction capabilities of CO itself, a prevalent component of automobile exhaust. Herein, atomically dispersed Pt/CeO was fabricated and activated by CO, which could lower the 90% conversion temperature () by 256 °C and achieve a 20-fold higher CO consumption rate at 200 °C.

Asymmetric Coordination of Single-Atom Ru Sites Achieves Efficient N(sp)-H Dehydrogenation Catalysis for Ammonia Oxidation.

Ruthenium single-atom catalysts have great potential in ammonia-selective catalytic oxidation (NH-SCO); however, the stable sp hybrid orbital of NH molecules makes N(sp)-H dissociation a challenge for conventional symmetrical metallic oxide catalysts. Herein, we propose a heterogeneous interface reverse atom capture strategy to construct Ru with unique asymmetric RuNO coordination. RuNO/CeO exhibits intrinsic low-temperature conversion ( at 160 °C) compared to symmetric coordinated Ru-based (280 °C), Ir-based (220 °C), and Pt-based (200 °C) catalysts, and the TOF is 65.

Roles of the Comproportionation Reaction in SO Reduction Using Methane for the Flexible Recovery of Elemental Sulfur or Sulfides.

SO reduction with CH to produce elemental sulfur (S) or other sulfides is typically challenging due to high energy barriers and catalyst poisoning by SO. Herein, we report that a comproportionation reaction (CR) induced by HS recirculating significantly accelerates the reactions, altering reaction pathways and enabling flexible adjustment of the products from S to sulfides. Results show that SO can be fully reduced to HS at a lower temperature of 650 °C, compared to the 800 °C required for the direct reduction (DR), effectively eliminating catalyst poisoning.

Boosting NO Decomposition by Fabricating the Cs-O-Co Structure over CoO with Single-Layer Atoms of Cs.

Developing effective catalysts for NO decomposition at low temperatures is challenging. Herein, the Cs-O-Co structure, as the active species fabricated by single-layer atoms of Cs over pure CoO, originally exhibited great catalytic activity of NO decomposition in simulated vehicle exhaust and flue gas from nitric acid plants. A similar catalytic performance was also observed for Na, K, and Rb alkali metals over CoO catalysts for NO decomposition, illustrating the prevalence of alkali-metal-promotion over CoO in practical applications.

Cation Concavities Induced d-Band Electronic Modulation on Co/FeO Nanostructure to Activate Molecular and Interfacial Oxygen for CO Oxidation.

Cobalt-based catalysts have been identified for effective CO oxidation, but their activity is limited by molecular O and interfacial oxygen passivation at low temperatures. Optimization of the d-band structure of the cobalt center is an effective method to enhance the dissociation of oxygen species. Here, we developed a novel Co/FeO catalyst based on selective cationic deposition to anchor Co cations at the defect site of FeO, which exhibited superior intrinsic low-temperature activity (100%, 115 °C) compared to that of Pt/CoO (100%, 140 °C) and La/CoO (100%, 150 °C).

Unveiling the Halogenation-Induced Formation of HgSeX (X = Cl, Br, and I) Compounds for Multiphase Mercury Cycling.

The interaction between mercury (Hg) and inorganic compounds, including selenium (Se), sulfur (S), and halogens (X = Cl, Br, or I), plays a critical role in the global mercury cycle. However, most previously reported mercury compounds are susceptible to reduction, leading to the release of elemental mercury (Hg) and causing secondary pollution. In this study, we unveil a groundbreaking discovery that underscores the vital role of halogenation in creating exceptionally stable HgSeX compounds.

Electron Donation from Boron Suboxides via Strong p-d Orbital Hybridization Boosts Molecular O Activation on Ru/TiO for Low-Temperature Dibromomethane Oxidation.

Low-temperature catalytic oxidation is of significance to the degradation of halogenated volatile organic compounds (HVOCs) to avoid hazardous byproducts with low energy consumption. Efficient molecular oxygen (O) activation is pivotal to it but usually limited by the insufficient electron cloud density at the metal center. Herein, Ru-B catalysts with enhanced electron density around Ru were designed to achieve efficient O activation, realizing dibromomethane (DBM) degradation at 182 °C on RuB/TiO (about 30 °C lower than pristine Ru/TiO) with a TOF value of 0.

Mapping and spatiotemporal dynamics of land-use and land-cover change based on the Google Earth Engine cloud platform from Landsat imagery: A case study of Zhoushan Island, China.

Land resources are an essential foundation for socioeconomic development. Island land resources are limited, the type changes are particularly frequent, and the environment is fragile. Therefore, large-scale, long-term, and high-accuracy land-use classification and spatiotemporal characteristic analysis are of great significance for the sustainable development of islands.

CO sequestration and CaCO recovery with steel slag by a novel two-step leaching and carbonation method.

The steel smelting process produces extensive CO and Ca-containing steel slag (SS). Meanwhile, the low value utilization of steel slag results in the loss of Ca resources. CO sequestration utilizing SS can reduce carbon emissions while achieving Ca circulation.

Metal-Organic Frameworks Encaged Ru Single Atoms for Rapid Acetylene Harvest and Activation in Hydrochlorination.

Ruthenium (Ru)-based catalysts have been candidates in hydrochlorination for vinyl chloride monomer (VCM) production, yet they are limited by efficient acetylene (CH) utilization. The strong adsorption performance of HCl can deactivate Ru active sites which resulted in weak CH adsorption and slow activation kinetics. Herein, we designed a channel that employed metal-organic framework (MOF)-encaged Ru single atoms to achieve rapid adsorption and activation of CH.

SO-Driven In Situ Formation of Superstable HgSeCl for Effective Flue Gas Mercury Removal.

Flue gas mercury removal is mandatory for decreasing global mercury background concentration and ecosystem protection, but it severely suffers from the instability of traditional demercury products (, HgCl, HgO, HgS, and HgSe). Herein, we demonstrate a superstable HgSeCl compound, which offers a promising next-generation flue gas mercury removal strategy. Theoretical calculations revealed a superstable Hg bonding structure in HgSeCl, with the highest mercury dissociation energy (4.

Efficient NO Reduction against Alkali Poisoning over a Self-Protection Armor by Fabricating Surface Ce(SO) Species: Comparison to Commercial Vanadia Catalysts.

Resolving severe deactivation by alkali metals for selective catalytic reduction of NO with NH (NH-SCR) is challenging. Herein, surface Ce(SO) species as a self-protection armor originally exhibited antipoisoning of potassium over ceria-based catalysts. The self-protection armor was also effective for other alkali (Na), alkali-earth (Ca), and heavy (Pb) metals, considerably resolving the deactivation of ceria-based SCR catalysts in practical applications.

FeS@MOF-808 composite for efficient As(III) removal from wastewater: behavior and mechanism.

Arsenic is extremely toxic to humans with water as its carrier. One challenge for arsenic control is the complete elimination of As(III) due to its high toxicity, mobility, and solubility. Herein, an active FeS@MOF-808 composite was fabricated to enhance the As(III) removal for wastewater remediation.

Reverse Conversion Treatment of Gaseous Sulfur Trioxide Using Metastable Sulfides from Sulfur-Rich Flue Gas.

Sulfur trioxide (SO) is an unstable pollutant, and its removal from the gas phase of industrial flue gas remains a significant challenge. Herein, we propose a reverse conversion treatment (RCT) strategy to reduce S(VI) in SO to S(IV) by combining bench-scale experiments and theoretical studies. We first demonstrated that metastable sulfides can break the S-O bond in SO, leading to the re-formation of sulfur dioxide (SO).

The Unique CO Activation Effects for Boosting NH Selective Catalytic Oxidation over CuO-CeO.

Slip NH is a priority pollutant of concern to be removed in various flue gases with NO and CO after denitrification using NH-SCR or NH-SNCR, and the simultaneous catalytic removal of NH and CO has become one of the new topics in the deep treatment of such flue gases. Synergistic catalytic oxidation of CO and NH appears to be a promising method but still has many challenges. Due to the competition for active oxidizing species, CO was supposed to hinder the NH selective catalytic oxidation (NH-SCO).

Enhanced photoelectrochemical performance of ZnO/NiFe-layered double hydroxide for water splitting: Experimental and photo-assisted density functional theory calculations.

Hydrogen production technologies have attracted considerable attention with the increasing demand for renewable energy. Among them, the combined action of water electrolysis and solar energy has emerged. In this study, a hydrangea ZnO/NiFe-layered double hydroxide (LDH) heterojunction was synthesized using the two-step hydrothermal method.

See360: Novel Panoramic View Interpolation.

We present See360, which is a versatile and efficient framework for 360° panoramic view interpolation using latent space viewpoint estimation. Most of the existing view rendering approaches only focus on indoor or synthetic 3D environments and render new views of small objects. In contrast, we suggest to tackle camera-centered view synthesis as a 2D affine transformation without using point clouds or depth maps, which enables an effective 360° panoramic scene exploration.

DNA methylation biomarkers for diagnosis of primary liver cancer and distinguishing hepatocellular carcinoma from intrahepatic cholangiocarcinoma.

Hepatocellular carcinoma (HCC) and intrahepatic cholangiocarcinoma (ICC) are the two most common pathology subtypes of primary liver cancer (PLC). Identifying DNA methylation biomarkers for diagnosis of PLC and further distinguishing HCC from ICC plays a vital role in subsequent treatment options selection. To obtain potential diagnostic DNA methylation sites for PLC, differentially methylated CpG (DMC) sites were first screened by comparing the methylation data between normal liver samples and PLC samples (ICC samples and HCC samples).

Features Guided Face Super-Resolution via Hybrid Model of Deep Learning and Random Forests.

Face hallucination or super-resolution is a practical application of general image super-resolution which has been recently studied by many researchers. The challenge of good face hallucination comes from a variety of poses, illuminations, facial expressions, and other degradations. In many proposed methods, researchers resolve it by using a generative neural network to reduce the perceptual loss so we can generate a photo-realistic image.

Proton pump inhibitors and odds of cholangiocarcinoma: A retrospective case-control study.

Background & Aims: Proton pump inhibitors (PPIs) have been reported to be associated with cholangitis and might possibly be carcinogenic. However, few studies have been conducted to investigate the association of PPIs with cholangiocarcinoma (CCA). Thus, a hospital-based case-control study was carried out in China to explore the association between PPIs and CCA.