Energy-efficient and selective hydrocarbon reforming techniques are crucial for a sustainable future. This study develops a highly active and selective NiO/CeO2 oxygen carrier (OC) for low-temperature chemical looping partial oxidation of methane and water splitting. By using cubic CeO2 (cCeO2) as support and precisely tailoring the size and electronic structure of Ni active sites, simultaneous low-temperature CH4 activation and high syngas selectivity (CH4-to-syngas selectivity: > 98.5%) were achieved, effectively suppressing CH4 cracking and complete oxidation. The as-synthesized NiO/cCeO2 OCs operate efficiently at 600 °C, significantly lower than the conventional temperature, 800-900 °C. Nearly pure H2 is produced in the water splitting step. High selectivity eliminates the need for additional gas separation and purification units. It is noteworthy that reaction-driven OC activation pretreatment plays a significant role in achieving the stable low-temperature activity, which leads to the moderate aggregation (10-20 nm) of Ni species and transforms Ni2+ from a low-spin state into a high-spin state. The OC structural evolution during reaction, key active sites responsible for water splitting, and the support effect are systematically investigated. The highly precise microstructural manipulation strategies outlined here are expected to guide further advancements in high-performance low-temperature OCs for chemical looping processes.
Robust hydrogel electrolytes derived from liquid metal-initiated polymerization and increased hydrophobic association.
Anti-freezing hydrogels achieved by disrupting hydrogen bonds between water molecules.
Hydrogel electrolyte-enabled supercapacitors achieving high performance and mechanical deformability.
Conventional cementitious materials were engineered into active cementitious separators (ACSs) that function as capacity boosters rather than passive carriers, significantly enhancing the capacity of Zn–Mn batteries.
Continously generated zinc sulfate hydroxide within ACSs acts as an effective proton buffer, suppressing electrolyte acidification and stabilizing birnessite-MnO2 deposition.
ACSs-based Zn–Mn batteries achieve a balanced integration of structural integrity and electrochemical performance, delivering a ten-fold improvement in energy density (0.92 mWh cm−2 at 1.15 mW cm−2) and exceptional cycling stability (99.98% capacity retention after 1000 cycles).
Choroidal melanoma is a prevalent intraocular malignant tumor with high mortality rate and liver metastases, related to the lack of sensitive and noninvasive therapeutic modalities. To address the imaging diagnostics and therapeutic predicaments for choroidal melanoma, a novel nanoplatform is developed through the integration of an aggregation-induced emission photosensitizer with two-dimensional MXene nanosheets (MX@PEG-MeoTTPy). This nanoplatform simultaneously exhibits distinctive properties and multiple functions including exceptional biocompatibility, efficient type I reactive oxygen species generation, high-quality fluorescence bioimaging, mild near-infrared (NIR) photothermal performance and superior cellular uptake. Furthermore, a thermosensitive hydrogel composite is engineered to encapsulate the nanosheets, enabling controlled and sustained release over 72 h via NIR irradiation and tumor microenvironment-induced gel–sol transition. The nanoplatform leverages synergistic mild photothermal therapy and photodynamic therapy, leading to precise and sustained tumor ablation through pyroptosis-mediated cell death. Both in vitro and in vivo studies validate that the nanosystem serves as an effective theranostic agent for dual-modal imaging-guided synergistic therapy, offering a multifaceted therapeutic strategy for intraocular tumors and showing significant potential for clinical application in choroidal melanoma therapy.
A Fe-EGaIn/TPU core–sheath fiber is fabricated by coaxial wet spinning, enabling high stretchability together with Joule heating, infrared stealth, strain-invariant conductivity, and electromagnetic interference (EMI) shielding.
The fiber exhibits strain-invariant conductivity, showing only a -6% resistance change at 100% strain; COMSOL simulations corroborate the tensile-loading mechanism underpinning this behavior.
A Fe-EGaIn/TPU textile woven from orthogonally interlaced horizontal and vertical fibers delivers absorption-dominated EMI shielding with only 7 wt% Fe.
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