Yi Mei

Yellow phosphorus tail gas, containing over 90% CO gas, serves as a high-quality fuel resource. Nevertheless, the phosphoric acid produced by the combustion of PH3 can corrode the gas-fired boilers. Herein, we propose an in situ dephosphorization strategy using fluidized phosphate rock powder as an absorbent during tail gas combustion. In an industrial fluidized bed boiler, PH3 is oxidized to P4O10 and H3PO4, which are captured by the powder. The system achieved over 99.8% dephosphorization efficiency, and the phosphorus content at the outlet was less than 5 mg/m3. Meanwhile, the phosphorus content of phosphate rock powder increases by 5.25%, enabling its reuse as a yellow phosphorus production feedstock. Characterization and reactivity tests reveal that dephosphorization active components are CaMg(CO3)2, KAl2(Si3AlO10)(OH)2, Ca5(PO4)3F, and SiO2, with reactivity decreasing in that order. In addition, the phosphate products formed after dephosphorization were identified. This work provides certain theoretical guidance for the efficient dephosphorization of the phosphate rock powder.

Alloying Ni with another metal on γ‐Al ₂ O ₃ support holds considerable promise to enhance carbon‐resistance in dry reforming of methane (DRM), yet its effectiveness is constrained by poorly controlled alloy structure and surface Al‐OH groups. Herein, bimetallic NiCo/γ‐Al ₂ O ₃ catalysts were designated using electropositive NiCo complexes via a strong electrostatic adsorption strategy. The NiCo alloy and oxygen vacancy were primarily derived from the evolution of surface Al‐ μ ₂ ‐OH and Al‐ μ ₃ ‐OH groups anchored NiCo layered structures. The optimized Ni _3.0 Co _3.0 Al catalyst achieved near‐thermodynamic‐equilibrium CH ₄ and CO ₂ conversions, along with ultra‐low coke deposition rate (0.03 mg _coke ·g _cat ⁻¹ ·h ⁻¹ ) after 200 h on‐stream at 600°C. Microkinetic and in situ FTIR studies elucidated the reaction mechanism, wherein CH _x * species from CH ₄ decomposition on atomically uniform NiCo alloys were rapidly eliminated by surface Al–OH and reactive O* generated from CO ₂ dissociation on limited oxygen vacancies, forming labile HCOO* and CH _x O* intermediates, while effectively suppressing the Boudouard reaction, thereby ensuring exceptional catalyst longevity.

Confined reverse microemulsion enables in situ SiO ₂ coating on NCM523, forming a conformal interfacial layer that reduces side reactions, suppresses particle cracking, and improves cycling stability.

Photocatalytic CO ₂ reduction driven by solar energy is a promising route for sustainable carbon utilization, yet achieving high CO selectivity with efficient charge separation remains challenging. Herein, a CuPc–Ni co‐modified g‐C ₃ N ₄ (CN) photocatalyst was constructed via an impregnation–photodeposition strategy to enable selective CO ₂ ‐to‐CO conversion without sacrificial agents. CuPc enhances visible‐light absorption, while Ni acts as an electron sink to suppress charge recombination. Photoelectrochemical measurements and band structure analyses reveal the formation of an S‐scheme heterojunction that promotes directional charge migration. The optimized 5%CuPc–5%Ni/CN catalyst delivers a CO production rate of 9.71 μmol·g ⁻¹ ·h ⁻¹ with a high CO selectivity of 96%, along with good cycling stability. In situ diffuse reflectance infrared Fourier transform spectroscopy identifies ^* HCOO as a key intermediate, indicating a formate‐mediated reaction pathway. This work provides an effective strategy for constructing S‐scheme CN‐based photocatalysts toward highly selective CO ₂ reduction.

Exploring electromagnetic wave (EMW) absorbing materials with thin thickness, wide bandwidth, and strong attenuation characteristics to reduce electromagnetic pollution remains a critical challenge. This study constructs Fe-Co-SnSe/graphite nanosheet composites through solid-state reaction and ball milling processes, successfully anchoring magnetic nanoparticles onto graphite nanosheets. By rationally regulating the molar ratio of magnetic components, the FCS/G-1.5 composite delivers an RL_min of -46.53 dB, corresponding to an EAB of 3.68 GHz at a thickness of merely 1.3 mm. Furthermore, a significant reduction in the radar cross-section (RCS) value during far-field simulations further verifies the practical applicability of the FCS/G-x composites. The outstanding electromagnetic properties of the as-prepared composites are mainly ascribed to the synergistic effect between dielectric loss and magnetic loss. This includes the cooperative contribution of multiple loss mechanisms, such as interfacial polarization, conduction loss, eddy current loss, as well as natural resonance and exchange resonance. This study fills the gap in the progress of SnSe-based absorbing materials and provides a reliable pathway for designing the next generation of lightweight and efficient EMW absorbing devices.

The goal of carbon neutrality has strengthened the development of sustainable energy technologies, among which mixed ionic and electronic conducting oxygen transport membranes have gradually become research focuses because they have great potential in the production of high-purity oxygen, hydrogen purification, oxygen-containing catalytic reactions, and carbon dioxide capture. In this study, a graded porous-supported symmetric flat ceramic membrane was prepared by an aqueous tape-casting method using K₂NiF_4+δ-type oxide La₂Ni_0.95Mo_0.05O_4+δ as the membrane material. The membrane structure introduces graded porous support layers on both sides of the dense functional layer, ensuring efficient oxygen-ion transmission while maintaining excellent mechanical robustness. The results show that the oxygen flux of this material under the graded porous-supported symmetric structure is 3.18 mL min^-1 cm^-2 (i.e., 31.8 L min^-1 m^-2) when air is used as the feedstock gas, and it remains stable even under CO₂ and coke oven gas. Compared with hollow-fiber membranes, this study not only has excellent air permeability, but also has significant advantages in simple production and high output. Due to its low cost, excellent CO₂ tolerance, and long-term operational stability, it shows great potential in industrial applications.

Red phosphorus (RP) anodes are promising candidates for fast‐charging, high‐energy lithium‐ion batteries due to their high Li‐ion conductivity, high specific capacity (2596 mAh g ⁻¹ ), and suitable lithiation potential (∼0.7 V vs. Li ⁺ /Li). However, its inherently low electrical conductivity and severe volume expansion limit its practical application. To solve these issues, the vaporization‐condensation strategy is widely considered an effective approach to incorporate phosphorus into a conductive carbon framework. Generally, this deposition process typically leads to the formation of RP particles with uneven size distributions. Consequently, the large bulk RP or particles exposed on the exterior surface of carriers are highly susceptible to fracture and deactivation during drastic volume changes. Herein, we demonstrate that nitrogen‐doped iron single‐atom catalytic sites provide strong adsorption for P ₄ molecules via the formation of Fe─P bonds. This interaction accelerates the adsorption of P ₄ gaseous molecules and their polymerization, thereby achieving exceptional uniformity and site‐selectivity in RP loading. Benefiting from the uniformly distributed small‐sized RP nanoparticles, the anode exhibits excellent electrochemical performance, with remaining capacity retention rates of 91.63%, 96.14%, and 83.75% after 300, 600, and 500 cycles at current densities of 0.26, 1.0, and 2.6 A g ⁻¹ , respectively.