Ultrasonic-assisted hot pressing (UAHP) has shown significant potential in enhancing both densification and mechanical performance of metallic materials. However, the poor high-temperature stability of the ultrasonic system severely limits its application in the fabrication of high-melting-point materials. Currently, UAHP has yet been applied to difficult-to-sinter ceramic materials, such as monolithic boron carbide (B₄C). Filling this research gap is imperative since UAHP opens a new avenue for the preparation of difficult-to-sinter ceramics.

The electrochemical oxidation of glycerol (GOR) is gaining traction as a sustainable method to convert biodiesel byproducts into valuable chemicals and fuels, aligning with global demands for renewable energy and green production. Recent advances in catalyst design, reaction mechanisms, and system integration are driving progress, though challenges in selectivity, stability, and scalability remain pivotal for industrial adoption. Researchers are tuning both noble and non-noble metal catalysts—through methods such as facet engineering and single-atom doping—to selectively steer reactions toward high-value multi-carbon products. Furthermore, coupling GOR with cathodic processes like hydrogen evolution or CO₂ reduction offers a path to lower energy use and co-produce clean fuels. Key hurdles, including mass transfer limits and feedstock compatibility, still need addressing. Proposed solutions range from advanced electrode assemblies to integrated techno-economic assessments. Moving forward, a system-level approach that balances technical performance with economic viability will be essential to accelerate GOR technology toward real-world application.

In the field of polyoxometalate chemistry, organophosphonate covalently modified polyoxometalates have recently emerged as a promising frontier. These hybrid materials not only broaden the structural diversity of conventional polyoxometalate derivatives and address the inherent stability limitations of polyoxometalates, but also allow for the design of improved properties tailored to diverse applications. This review provides a comprehensive summary of recent advances in organophosphonate covalently modified polyoxometalates research, with a particular focus on their structural features, functional properties, and prospective research directions.