关键词: 超临界流体沉积, 负载型金属催化剂, 溶解, 吸附, 还原

Abstract: This is a summary on progress in the preparation of supported nanoscale metal catalysts via supercritical fluid deposition. Taking advantage of supercritical fluids with nearly zero surface tension，gas-like diffusion coefficient，low viscosity，liquid-like high solvent efficiency and adjustability，many authors have successfully prepared the metal nanoparticles supported on porous materials. In terms of dissolution，adsorption and reduction of metal precursors during supercritical fluid deposition，recently reported achievements are summarized and discussed，especially regarding solubility，adsorption thermodynamics and diffusion kinetics. In addition，the improvement on metal utilization rate，particle size control and dispersity confronted in the fabrication of metal nanocomposites by the supercritical fluid deposition are discussed.

Key words: supercritical fluid deposition, supported metal catalyst, dissolution, adsorption, reduction