Particle–support
interaction has been recognized as a driving
force for improving catalytic performance. To achieve this unique
interaction, the common synthetic strategy is to load the active noble-metal
particles onto a specific supporter. Due to the surface features and
the sheetlike geometry, two-dimensional (2D) metal oxides are promising
supporters for metal particle loading, resulting in the stable interfacial
binding and the reduced charge transfer distance. Herein, three different
types of 2D-based vanadium oxide supporters are proposed to be synthesized
by using a controllable self-assembly approach. After the loading
of active iridium nanoparticles, it is concluded that the optimal
geometry for superior catalytic kinetics is the 2D one, which is primarily
contributed by the strongest Ir–V–O interaction over
particle–support interfaces. This work will provide some new
insights into the particle–support interaction mechanisms and
offer a possible solution for optimizing the electrocatalytic kinetics
by adjusting the geometry of the supporter.