Fig. 1: Illustrating the design of artful single-atom catalysts (ASACs) on reducible catalyst supports.
From: Defying the oxidative-addition prerequisite in cross-coupling through artful single-atom catalysts
a Rational design of ASAC for cross-coupling reactions, where M1 denotes the foreign single-metal-atom introduced to the reducible carriers. b Using single-atom Pd1 anchored on the reducible CeO2 as a representative example, this panel illustrates the dynamic structural and valence state evolution of the Pd1 ASAC, which effectively circumvent the energy barrier for oxidative addition in cross-coupling reactions, in contrast to traditional homogeneous catalyst systems where the reaction rate is largely limited by this step. The white, gray, green, orange, red, yellow, and blue spheres represent hydrogen, carbon, boron, bromine, oxygen, cerium, and palladium atoms, respectively. The pink and blue regions represent charge accumulation and loss, respectively.
