Amino-metalloporphyrin polymers derived Fe single atom catalysts for highly efficient oxygen reduction reaction

Crystal facet effects of platinum single-atom catalysts in hydrolytic dehydrogenation of ammonia borane

“…Featuring maximum utilization efficiency of noble metals and remarkable catalytic properties, single-atom catalysts (SACs) have attracted tremendous attention aer being rst coined by Zhang and coworkers. 7 SACs have been applied in various elds and made advances, e.g., the hydrogen evolution reaction, [8][9][10] selective hydrogenation, 11,12 the oxygen reduction reaction (ORR), 13,14 propane dehydrogenation (PDH), 15,16 oxidation of arylalkanes, 17,18 and the r-WGS reaction. 19 Due to the absence of metal-metal bonds in SACs, the activity of SACs, which is primarily responsible for supported isolated atoms, depends more strongly on the properties of the supports than that of the nano-catalysts.…”

2D π‐conjugated metal–organic frameworks for CO2 electroreduction

“…Thanks to the advanced synthesis and characterization techniques, single‐atom catalysts (SACs) have become a new research hotspot in catalysis science 30,31 . Different from the traditional metal catalysts, each metal site is uniformly dispersed on the SACs surface in the form of an isolated atom, and each metal atom can be regarded as a single active site 32,33 . Moreover, SACs exhibit similar structural characteristics as a homogeneous catalyst, such as well‐defined active centers and uniform geometric structure.…”

“…30,31 Different from the traditional metal catalysts, each metal site is uniformly dispersed on the SACs surface in the form of an isolated atom, and each metal atom can be regarded as a single active site. 32,33 Moreover, SACs exhibit similar structural characteristics as a homogeneous catalyst, such as well-defined active centers and uniform geometric structure. The 100% atom-utilization efficiency can maximize their catalytic activity; meanwhile, the homogeneity in the metal sites facilitates high selectivity toward specific carbon products.…”

Fast decomposition of Li2CO3/C actuated by single-atom catalysts for Li-CO2 batteries

“…As heterogeneous catalysts in Li-CO 2 battery systems, metal catalysts exhibit rapid electron transfer across the catalyst/support interface and can be actuated by the particle size relevant to the interfacial electronic interaction [24]. Single-atom catalysts (SACs) reflect the ultimate small-size limit for metal nanoparticles [25]. Notably, because the size of the metal catalyst is decreased down to that of a single atom, the interfacial electronic interaction is ultimately maximized [26].…”

“…The increased under-coordination of the metal atoms in SACs contributes to the enhanced catalytic activity, and their uniform size hinders their aggregation in the support substrates. In addition, the maximized efficiency of metal atom utilization enables unique interfacial electron interaction and electron transport efficiency in SACs such as Ni, Co, and Fe [25,28], thus accelerating the kinetics of the energy-conversion reactions and boosting extraordinary catalytic activity in energy storage systems [29,30]. Li et al [31] reported that the CO 2 reduction reaction (CO 2 RR) is sizedependent on Ni-based catalysts and that Ni-based SACs display superior catalytic activity with a Faradaic efficiency of 97%.…”