Surface curvature effect on single-atom sites for the oxygen reduction reaction: A model of mesoporous MOF-derived carbon

The role of high-resolution transmission electron microscopy and aberration corrected scanning transmission electron microscopy in unraveling the structure–property relationships of Pt-based fuel cells electrocatalysts

“…Determining the particle size distribution is key when one wants to assess the utilization of metals and how well the catalyst is distributed over the support, especially in the case when investigating highly dispersed systems such as single atom catalysts (SACs). [28][29][30] When investigating NPs, another important attribute is the generalized coordination number of surface atoms that was shown to be a descriptor for ORR activity. 31 The smaller the nanoparticles the more of their surface is occupied by low-coordinated sites, which results in lower ORR activity in the case of Pt.…”

First-principles studies of enhanced oxygen reduction reactions on graphene- and nitrogen-doped graphene-coated platinum surfaces

“…Notably, fuel cells have emerged as a promising technology for generating electricity through reactions involving oxygen and hydrogen. [10][11][12] Despite these advancements, a key challenge persists in the development of efficient and durable cathode catalysts for fuel cells. Specifically, the slow kinetics of the oxygen reduction reaction (ORR) occurring in the cathode are a primary bottleneck, resulting in a large proportion of potential loss.…”

Hierarchical Porous Carbon Supported Co2P2O7 Nanoparticles for Oxygen Evolution and Oxygen Reduction in a Rechargeable Zn–Air Battery

“…Transition metals anchored on a hierarchical porous carbon matrix have been regarded as highly efficient electrocatalysts due to the merits of their easily tunable electron configuration and highly exposed active sites. − Typically, the d -block metal centers have been widely investigated for updating reduction activity via crystalline regulating, defect engineering, and metal elements tuning, due to their high surface-to-volume ratios and the presence of a multimetal atom structure. , In addition, the structure of the metal active centers can be modulated through heteroatom doping to enhance the catalytic activity and structural stability. − Furthermore, the morphology and nanoscale structure of the catalyst can be adjusted to anchor and expose metal sites at the gas/liquid/solid triphasic interface, − which facilitates the diffusion of gas molecules and the transport of O 2 to the active sites. − However, the intricate local coordination environment and the difficulty in precise structure design present a challenge in establishing effective bifunctional catalysts.…”