Spotting d-band centers of single-atom catalysts by oxygen intermediate-boosted electrochemiluminescence.

Catalytic activities of single-atom catalysts are strongly dependent on their d-band centers. However, it is a long-standing challenge to provide a cost-effective and accurate evaluation for the positions of d-band centers of these catalysts due to the fact that the widely applicable photoelectron spectroscopy methodologies require complicated sampling and spectral unfolding processes. In this contribution, we have proposed oxygen intermediate-boosted electrochemiluminescence (ECL) for rapid spotting of the d-band centers of single-atom catalysts, involving single atomic Au, Ag, Cu and Fe.

Three-dimensional direct visualization of silica dispersion in polymer-based composites.

The uniform dispersion of silica fillers or other neutral fillers in the polymer matrix is significant for fabricating high-performance polymer-based composites. However, there is a long-standing challenge to provide a comprehensive, wide-area and real 3D distribution map to achieve direct visualization for the dispersion state of neutral silica. Herein, we propose a novel strategy for modifying silica fillers with commercial fluorophores to form fluorescent fillers in a standard manner.