Ping Cui

Precarbonization is a crucial step in the graphitization of petroleum coke to produce anode materials, and its caking property adversely affects the stable

The effects of Mg2+ on the combustion behavior of Loy Yang lignite (LY) were studied. The combustion behaviors of all samples were investigated using a the

Oxygen evolution reaction (OER) is the rate‐limiting step in water electrolysis due to its sluggish kinetic, and it is challenging to develop an OER catalyst that could work efficiently in both acid and alkaline environment. Herein, NiIr nanowire assembles (NAs) with unique nanoflower morphology were prepared by a facile hydrothermal method. As a result, the NiIr NAs exhibited superior OER activity in both acid and alkaline media. Specifically, in 0.1 M HClO₄, NiIr NAs presented a superior electrocatalytic performance with a low overpotential of merely 242 mV at 10 mA cm⁻² and a Tafel slope of only 58.1 mV dec⁻¹, surpassing that of commercial IrO₂ and pure Ir NAs. And it achieved a significantly higher mass activity of 148.40 A/g at −1.5 V versus RHE. In 1.0 M KOH, NiIr NAs has an overpotential of 291 mV at 10 mA cm⁻² and a Tafel slope of 42.1 mV dec⁻¹. Such remarkable activity makes the NiIr NAs among the best of recently reported representative Ir‐based OER electrocatalysts. Density functional theory (DFT) calculations confirmed alloying effect promotes surface bonding of NiIr with oxygen‐containing reactants, resulting in excellent catalytic properties.

Solid propellants have significant applications in aerospace, and improving their combustion performance has become a hot research topic in recent years. Carbon black (CB) has been widely used in the field of catalytic pyrolysis due to its low cost, controllable morphology, and ease of modification. Herein, we first investigates the structure-activity relationship between the physicochemical properties of nine types of CB with a particle size range of 1-15 μm and a mass fraction of 5%, including oil absorption value, compression oil absorption value, and oxygen content, and the catalytic pyrolysis of ammonium perchlorate (AP), concluding that the function relationship between oil absorption value and high-temperature peak is Y1=1032.67-9.618x+0.038x2, the function relationship between compression oil absorption value and high-temperature peak is Y2=145.537+62.365ln(x), and the function relationship between oxygen content and high-temperature peak is Y3=e(6.085-0.02/x). Based on these, we further uses coal tar, which is abundant in sources, as the raw material to prepare five types of coal-based CB marked as CB1-CB5 at pyrolysis temperatures of 1000~1800 ℃. The relative error between the actual peak value and the predicted value of the CB/AP composite particles is less than 5%, proving that the peak temperature model of CB/AP composite particles can guide actual production. This study contributes to promoting CB application in improving the catalytic pyrolysis performance of ammonium perchlorate and enhancing the high added value utilization of coal-derived products.

An Erratum to this paper has been published: https://doi.org/10.3103/S1068364X24070019

The mixture of lignite (HM) and oil shale organic matter (OS), which was prepared from Huadian oil shale treated using acids, was copyrolyzed in a fixed-be

To reveal the molecular structure characteristics of the caking components in coal, three coals with different ranks were treated using a new synthetic ion

We proposed a low-temperature slow pyrolysis treatment (LTSPT) to improve the caking property of Shenmu long flame coal (SMCY). To reveal the factors affec