Manganese Carbodiimide (MnNCN): A New Heterogeneous Mn Catalyst for the Selective Synthesis of Nitriles from Alcohols.

Earth-abundant manganese oxides (MnO) were competitive candidates when screening catalysts for ammoxidation of alcohols into nitriles due to their redox property. However, over-oxidation and possible acid-catalyzed hydrolysis of nitriles into amides still limited the application of MnO in nitrile synthesis. In this work, manganese carbodiimide (MnNCN) was first reported to be robust for the ammoxidation of alcohols into nitriles, avoiding over-oxidation and the hydrolysis.

NiSe/CeO catalysts from Ce-UiO-66 metal-organic skeletons and their electrocatalytic oxidation of methanol, urea and glycerol.

Hydrogen is a viable alternative energy source to fossil fuels. In order to manufacture enough hydrogen to meet the needs of social growth, finding an alternate energy source that is more effective is essential. Electrochemical water cracking is a more appropriate method for producing hydrogen.

Interfacial engineering of nickel selenide with CeO on N-doped carbon nanosheets for efficient methanol and urea electro-oxidation.

The design of low cost, high efficiency electrocatalysts for methanol oxidation reactions (MOR) and urea oxidation reactions (UOR) is a pressing need to address the energy crisis and water pollution. In the present work, we developed Cerium dioxide (CeO) and nickel selenide (NiSe) nanoparticles integrated into three-dimensional N-doped carbon nanosheets to be used as efficient and stable bifunctional electrocatalysts for MOR and UOR. By optimizing the selenization temperature, the CeO-modified NiSe obtained at selenization temperature of 550 °C (CeO-NiSe-550-NC) has the best MOR and UOR electrochemical performance.

Understanding the copper-iridium nanocrystals as highly effective bifunctional pH-universal electrocatalysts for water splitting.

It is pivotal to develop an economical, effective, and stable catalyst to promote the oxygen/hydrogen evolution reaction (OER/HER) throughout pH electrolytes, as the demand for hydrogen energy will increase greatly with the future development. Herein, a series of Ir-Cu nanoparticle composite carbon (IrCu/C) catalysts are successfully synthesized using ethylene glycol reduction. In addition, the structure, morphology and composition of the electrocatalysts were systematically characterized, and the OER/HER performance of the catalysts was also tested under different pH conditions.

Preparation of 3D NdO-NiSe-Modified Nitrogen-Doped Carbon and Its Electrocatalytic Oxidation of Methanol and Urea.

Developing renewable energy sources and controlling water pollution are critical but challenging problems. Urea oxidation (UOR) and methanol oxidation (MOR), both of which have high research value, have the potential to effectively address wastewater pollution and energy crisis problems. A three-dimensional neodymium-dioxide/nickel-selenide-modified nitrogen-doped carbon nanosheet (NdO-NiSe-NC) catalyst is prepared in this study by using mixed freeze-drying, salt-template-assisted technology, and high-temperature pyrolysis.

Porous Electrospun Films with Reversible Photoresponsive Microenvironmental Humidity Regulation: A Controllable Hydrogen-Bonding Synergistic Effect Exhibited by Acrylic Acid Segments.

Suitable relative humidity is essential for the preservation of cultural relics, food storage, and so on. A special material that can regulate the relative humidity in the microenvironment is particularly important. In this work, several innovative electrospun films with reversible photoresponsive wettability and the ability to regulate microenvironmental relative humidity were prepared.

Revealing the Real Role of Etching during Controlled Assembly of Nanocrystals Applied to Electrochemical Reduction of CO.

In recent years, the use of inexpensive and efficient catalysts for the electrocatalytic CO reduction reaction (CORR) to regulate syngas ratios has become a hot research topic. Here, a series of nitrogen-doped iron carbide catalysts loaded onto reduced graphene oxide (N-FeC/rGO-H) were prepared by pyrolysis of iron oleate, etching, and nitrogen-doped carbonization. The main products of the N-FeC/rGO-H electrocatalytic reduction of CO are CO and H, when tested in a 0.

Ultradispersed Ir Ni clusters as bifunctional electrocatalysts for high-efficiency water splitting in acid electrolytes.

Design and synthesis of electrocatalysts with high activity and low cost is an important challenge for water splitting. We report a rapid and facile synthetic route to obtain Ir Ni clusters polyol reduction. The Ir Ni clusters show excellent activity for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in acidic electrolytes.

Water-Tolerant Boron-Substituted MCM-41 for Oxidative Dehydrogenation of Propane.

Boron-based catalysts for oxidative dehydrogenation of propane (ODHP) have displayed excellent olefin selectivity. However, the drawback of deboronation leading to catalyst deactivation limited their scalable applications. Hereby, a series of mesoporous B-MCM-41 (BM-, B/Si = 0.

Controlled assembly of nitrogen-doped iron carbide nanoparticles on reduced graphene oxide for electrochemical reduction of carbon dioxide to syngas.

The electrocatalytic CO reduction reaction (CORR) decreases the amount of greenhouse gas in the atmosphere while enabling a closed carbon cycle. Herein, iron oleate was used as a precursor to produce oleic acid-coated triiron tetraoxide nanoparticles (FeO@OA NPs) by pyrolysis, which was then assembled with reduced graphene oxide (rGO) and doped with dicyandiamide as a nitrogen source to obtain nitrogen-doped iron carbide nanoparticles assembled on rGO (N-FeC/rGO NPs). The catalyst prepared by nitrogen doping at 800 °C with an FeO@OA NPs to rGO weight ratio of 20:1 showed good activity and stability for the CORR.

Rational design of CuPdN nanocrystals for selective electroreduction of carbon dioxide to formic acid.

The selective electrochemical reduction of CO yields value-added products that are important renewable energy resources for carbon recycling. In this study, CuPdN nanocrystals (NCs) exhibited higher electrocatalytic activity for carbon dioxide (CO) reduction to formic acid (HCOOH) than as-prepared CuN and CuPd NCs. In addition, the reaction yielded small amounts of CO (<5%), H, and HCOOH as the main products, and the electrocatalytic activity of the Cu NCs was significantly enhanced by modification with N and Pd.

One pot synthesis of diarylfurans from aryl esters and PhI(OAc)2 via palladium-associated iodonium ylides.

The example of palladium-catalyzed intermolecular cyclization for the synthesis of various diarylfurans in which one of the aromatic rings originates from the phenolic part of the starting ester and the other one from PhI(OAc)2 has been reported. The reaction is carried out through two steps: the rearrangement of palladium-associated iodonium ylides to form o-iodo diaryl ether and then palladium catalyzed intramolecular direct arylation. This reaction can tolerate a variety of functional groups and is alternative or complementary to the previous methods for the synthesis of diarylfurans.

Energy-efficient green catalysis: supported gold nanoparticle-catalyzed aminolysis of esters with inert tertiary amines by C-O and C-N bond activations.

Catalyzed by supported gold nanoparticles, an aminolysis reaction between various aryl esters and inert tertiary amines by C-O and C-N bond activations has been developed for the selective synthesis of tertiary amides. Comparison studies indicated that the gold nanoparticles could perform energy-efficient green catalysis at room temperature, whereas Pd(OAc)2 could not.

Aminolysis of aryl ester using tertiary amine as amino donor via C-O and C-N bond activations.

An aminolysis reaction between various aryl esters and inert tertiary amines by C-O and C-N bond activations has been developed for the selective synthesis of a broad scope of tertiary amides under neutral and mild conditions. The mechanism may undergo the two key steps of oxidative addition of acyl C-O bond in parent ester and C-N bond cleavage of tertiary amine via an iminium-type intermediate.

[Active oxygen species of Co-V-O catalysts in propane oxidative dehydrogenation analyzed by FTIR and XPS spectra].

A series of Co-V-O (meta-CoV2O6, pyro-Co2 V2 O7, and ortho-Co3 V2 O8) catalysts were prepared by microwave oxalate co-precipitation method and characterized by (XRD), TEM, BET, FTIR, XPS, H2-TPR and conductivity measurement. The catalytic characters of the catalysts for propane oxidative dehydrogenation were investigated. The FTIR spectra of catalysts were obtained in the range of 400-1 100 cm(-1) and their major bands were assigned.

[Determination of trace elements in mongolian medicine curing hyperlipidemia disease by ICP-AES].

During the study of the Mongolian medicine, we found that the Mongolian medicine contains great amount and a variety of trace elements needed for human body, but the heavy metals are very little. A method for the determination of Ca, Cu, Zn, Fe, Mg, Mn and Pb in the Mongolian medicine. (1# the morning medicine, 2# the noon medicine and 3# the evening medicine.

[Study on performance of Ni3 V2O8 catalyst and analysis of X-ray photoelectron spectroscopy].

Ni3V2O8 catalyst was prepared by oxalate co-precipitation method with microwave heating in this paper. In order to study the relationship between the catalytic performance and the surface species, the catalyst was characterized by XRD, BET, H2-TPR, XPS, TEM and conductivity measurement. The surface property of Ni3V2O8 was studied by XPS and the catalytic performance of the oxidative dehydrogenation of propane to propylene was also investigated.

Effect of Maotai liquor in inducing metallothioneins and on hepatic stellate cells.

Aim: To explore the possible mechanism why drinking Maotai liquor dose not cause hepatic fibrosis.

Methods: After being fed with Maotai for 56 days consecutively, the male SD rats were decollated for detecting the biological indexes, and the livers were harvested to examine the liver indexes and the level of hepatic metallothioneins (MT). Hepatic stellate cells (HSC) proliferation and collagen generation were also observed.