Edge-hosted Fe-N3 sites on a multiscale porous carbon framework combining high intrinsic activity with efficient mass transport for oxygen reduction

Quasi-solid-state Zn-air batteries with an atomically dispersed cobalt electrocatalyst and organohydrogel electrolyte

“…Single-atom catalysts (SACs) supported on nitrogen-doped carbon possess high electrical conductivity and a well-defined atomic structure with a tunable coordination environment, exhibiting a near 100% utilization of the atomic metal sites [8][9][10][11] . Among transitional metals (e.g., Fe, Co, Ni, and Mn), electrocatalysts with atomically dispersed Co sites are promising alternatives for improving reversible O 2 redox kinetics.…”

Research progress of asymmetrically coordinated single-atom catalysts for electrocatalytic reactions

“…The DFT calculation results showed that the intrinsic activity of edge-supported Fe-N 3 sites is signicantly enhanced compared with Fe-N 4 sites dispersed on a conventional carrier, which greatly facilitates the ORR process. 56 Co-N 5 with a clear coordination structure as the active site to catalyze the reduction of carbon dioxide was veri-ed by Pan et al The single-atom Co-N 5 site is also the main active center for CO 2 activation and the rapid formation of the key reaction intermediate COOH* and CO desorption. Its CO Faraday efficiency (FE CO ) at À0.73 and À0.79 V is 15.5 times that of cobalt phthalocyanine (CoPc).…”

“…SACs with asymmetrically coordinated M–N x active sites have been widely reported in the field of the ORR, among which the M–N 2 structure exhibits outstanding performance. The researchers found that, through the electronic and atomic synergistic effect between isolated metal sites and an N-doped carbon support, SACs with Mn–N 2 , 68 Fe–N 2 , 56 Cu–N 2 (ref. 69) and Co–N 2 (ref.…”

Strategies for boosting the activity of single-atom catalysts for future energy applications

“…103,[117][118][119] Thus, it will be the best platform for studying the activity and selectivity by regulating the catalytic routes. 120,121,129 For ORR activity, the decisive descriptor is the binding energy between the catalytic centers and oxygen species. The relationship between binding energy and activity is similar to a volcano curve (Fig.…”