Abstract Direct ethanol fuel cells (DEFCs) play an indispensable role in the cyclic utilization of carbon resources due to its high volumetric energy density, efficiency, and environmental benign character. However, owing chemically stable carbon‐carbon (C─C) bond ethanol, incomplete electrooxidation at anode severely inhibits power density output DEFCs. The efficiency C─C cleaving on state‐of‐the‐art Pt or Pd catalysts is reported as low 7.5%. Recently, tremendous efforts are devoted this...

The crucial issue restricting the application of direct ethanol fuel cells (DEFCs) is incomplete and sluggish electrooxidation due to chemically stable C-C bond thereof. Herein, a unique ethylene-mediated pathway with 100 % C1-selectivity for oxidation reaction (EOR) proposed first time based on well-structured Pt/Al2 O3 @TiAl catalyst cascade active sites. electrochemical in situ Fourier transform infrared spectroscopy (FTIR) differential mass spectrometry (DEMS) analysis disclose that...

Abstract Hydrogen evolution reaction (HER), as one of the most advanced methods for green production hydrogen, is greatly impeded by inefficient mass transfer. Here we present an efficiently reactant enriched and traffic system integrating high‐curvature Pt nanocones with 3D porous TiAl framework to enhance transfer rate. Theoretical simulations, in situ Raman spectroscopy potential‐dependent Fourier transform infrared results disclose that strong local electric field induced can promote H 3...

Synthetic hydrocarbon aviation lubricating oils (SHALOs) gradually degrade over time when subjected to high temperatures, resulting in their composition and properties varying the operation lifetime. Therefore, understanding SHALO degradation by elucidating mechanism on a molecular level, as function of temperature, is interest. A was thermal treatment (TT) at 180, 200, 230, 250, 270, or 300 °C for 2 h. The chemical compositions six TT samples one fresh oil were analyzed fourier transform...

Abstract The crucial issue restricting the application of direct ethanol fuel cells (DEFCs) is incomplete and sluggish electrooxidation due to chemically stable C−C bond thereof. Herein, a unique ethylene‐mediated pathway with 100 % C1‐selectivity for oxidation reaction (EOR) proposed first time based on well‐structured Pt/Al 2 O 3 @TiAl catalyst cascade active sites. electrochemical in situ Fourier transform infrared spectroscopy (FTIR) differential mass spectrometry (DEMS) analysis...

High temperature is the main factor responsible for degrading lubrication and antiwear properties of aero-lubricating oils. Accordingly, this study assessed effects thermal treatment diester aviation lubricating oil associated mechanism. Fourier-transform infrared spectroscopy gas chromatography/mass spectrometry analyses showed that low-molecular-weight compounds, such as monoesters, diesters, alcohols, olefins, were primary degradation products. An assessment mechanism...

Two kinds of phenol- and N- containing borate ester, BTEB BMEB have good hydrolysis stability due to the B-N coordination bond. The PB value improved by 60.7% 67.6% respectively at 0.5wt% BTEB, in rapeseed oil. Their antiwear effect increases with increase adding content, is better than BTEB. friction-reducing BMEB. All additives formed a protective film which BOx, FeOx other organic nitrogen compounds. capacities may complex boundary lubricating contain ferrous sulfate, sulfide. possessed...

The styrenated sulfur- and phosphorus-free organic titanate (STAE) was synthesized via an in situ method with soybean oil, diethanolamine, isopropyl titanate. tribological antioxidant behavior of the as-synthesized STAE as additive PAO evaluated by a four-ball test, rotary oxygen bomb test (ROBT), differential scanning calorimetry (DSC), its oxidative stability estimated through thermogravimetric analysis (TGA). exhibits excellent antiwear load-carrying capacities well good synergism zinc...

A four-ball tester was used to evaluate the tribological performances of bismuth naphthenate (BiNap), sulfurized isobutene (VSB), and their combinations. The results show that antiwear properties BiNap VSB are not very visible, but they possess good extreme pressure (EP) properties, particularly sulfur containing additives. Synergistic EP with various sulfur-containing additives were investigated. indicate exhibits synergism surface analytical tools, such as X-ray photoelectron spectrometer...

Purpose Pure 2,5‐dimercapto‐1,3,4‐thiadiazole (DMTD) disulfide dimer (DMS2) shows excellent four ball weld properties, however, the product is a solid material with relatively low initial seizure load and exhibits certain corrosion, which accelerate oxidation of lubricant by catalytic effect on metals. The author make efforts to resolve problems said design novel thiadiazole complex. Design/methodology/approach complex dimmer polyglycol (DMS2‐GL) was synthesized as ashless grease additive....

Two N-containing borates, BTES and BMES, were synthesized with dodecyl phenol, 2-(N-containing heterocyclic) ethan-1-ol, boric acid, dibutylamine, their tribological properties in rapeseed oil (RSO) investigated using a four-ball tester. The results showed that the load-carrying ability (PB value) of RSO can be improved by 40.9% 67.9%, respectively, when 0.5 wt% BMES. Moreover, antiwear friction-reducing performances additive-containing oils increased additive concentration. X-ray...

Tribological properties of two hydroxyl- and only active nitrogen-containing water-soluble imidazoline derivatives, benzotriazole-containing (BML) caprylic acid-containing (CML), as lubrication additive in water–glycol hydraulic fluid were evaluated with a four-ball tester. And the antirust anticorrosion behaviors also investigated. Results show that BML CML able to remarkably improve when added at low adding concentration, these performances was better than CML. All additives exhibited good...

Dissolved water content is an important performance index of jet fuel quality. The excess in directly affects the quality and normal operation flight equipment, even severely endangering safety. Many factors would affect fuel. In this paper, considering effects internal external on dissolved No. 3 fuel, such as toluene content, environmental temperature, humidity, anti-icing agent concentration, by Karl Fischer electrometric titration using a trace moisture analyzer. A model was developed to...

Purpose Molybdenum dithiocarbamate (MoDDC) has good antiwear and friction‐reducing properties in lubricants, can be protected against thermo‐oxidative degradation. However, MoDDC‐containing lubricants may lose their ability to reduce friction over time, which result from its concentration oils below a critical owing oxidative degradation of MoDDC. Thus, order enhance the durability low performance MoDDC, paper aims investigate synergistic antioxidants with Design/methodology/approach The...

Two oil-soluble organic titanium compounds (OTCs) such as dialkyldithiocarbamate (TiDDC) and sulfurized titanate (TiS) were synthesized identified by Fourier-transform infrared spectroscopy (FTIR). The antiwear extreme pressure properties of TiDDC or TiS with borate ester containing nitrogen (BNO) additive in mineral base oils evaluated four ball tester. results show that not only possess good load-carrying properties, respectively, but also exhibit synergism BNO without impairing...