A single-atom library for guided monometallic and concentration-complex multimetallic designs

A high-efficiency zirconium-based single-atom catalyst for the transformation of biomass-derived 5 hydroxymethylfurfural to 2,5-bis(hydroxymethyl)furan with nearly 100% selectivity

“…In contrast, the Zr/NC showed a prominent peak at around 1.62 Å, which was ascribed to the Zr–N coordination bond. 85 Particularly, the fingerprinting signal peak of the Zr− coordination bond was not detected, clearly implying that Zr belonged to the atomic dispersion in the nitrogen coordination environment of Zr/NC. Due to the high-resolution in K and R spaces, the wavelet transform (WT) contour plots were used to analyze the oscillation of Zr K-edge EXAFS.…”

“…3E) demonstrated that Zr foil had an obvious peak at around 2.82 Å, which was related to the Zr− coordination bond. 85 For ZrO 2 , it displayed two main peaks at around 1.65 Å and 3.07 Å that were attributed to the Zr−O coordination bond and the Zr− coordination bond, respectively. In contrast, the Zr/NC showed a prominent peak at around 1.62 Å, which was ascribed to the Zr–N coordination bond.…”

Electrically tunable two-dimensional heterojunctions for miniaturized near-infrared spectrometers

“…First of all, more metal species such as Pt, Pd, etc. are valuable to be explored in order to achieve higher enhancement of the absorption in view of the latest developed metal single atom fabrication technique 46 . Next, enhancement of light matter interaction by the micro-nano optical component, e.g., plasmon, cavity or metasurface, is another potential way to increase optical absorption of interlayer exciton, which is inspired by the effective tuning of organic charge transfer (CT) state by optical microcavity coupling 47 .…”

“…First of all, more metal species such as Pt, Pd, etc. are valuable to be explored in order to achieve higher enhancement of the absorption in view of the latest developed metal single atom fabrication technique 46 .…”

Neighboring Cationic Vacancy Assisted Adsorption Optimization on Single-Atom Sites for Improved Oxygen Evolution

“…Single-atom catalysts (SACs) with the utmost atomic utilization exhibit excellent catalytic activity in energy catalysis. Meanwhile, their uniform active sites with unique electronic microenvironments provide a perfect model for exploring the reaction mechanism. − The catalytic performance of SACs is intently correlated with the adsorption strengths of intermediates on reaction active sites. − In addition to the first-shell coordination of the metal active center, the adsorption strengths of intermediates can also be tuned via the second-shell neighboring microenvironment of single atoms. − For example, the electronic interaction between the atomic Fe center and neighboring P and S atoms weakened the binding energy for the intermediates, which enhanced the intrinsic performance of Fe sites in the oxygen reduction reaction . In another case, a neighboring S anion was introduced in Ru-N-C catalysts to increase the electron cloud density of the central Ru sites, which decreased the adsorption strength of *OH and improved the oxygen reduction performance .…”