The　0.7　wt%　Pt　+　0.3　wt%　Rh/Ce0.6Zr0.4O2　catalysts　were　fabricated　via　different　methods,　including　ultrasonic-assisted　membrane　reduction　(UAMR)　co-precipitation,　UAMR　separation　precipitation,　co-impregnation,　and　sequential　impregnation.　The　catalysts　were　physico-chemically　characterized　by　N-2　adsorption,　XRD,　TEM,　and　H-2-TPR　techniques,　and　evaluated　for　three-way　catalytic　activities　with　simulated　automobile　exhaust.　UAMR　co-precipitation-　and　UAMR　separation　precipitation-prepared　catalysts　exhibited　a　high　surface　area　and　metal　dispersion,　wide　lambda　window　and　excellent　conversion　for　NOx　reduction　under　lean　conditions.　Both　fresh　and　aged　catalysts　from　UAMR-precipitation　showed　the　high　surface　areas　of　ca.　60-67　m(2)/g　and　18-22　m(2)/g,　respectively,　high　metal　dispersion　of　41%-55%,　and　small　active　particle　diameters　of　2.1-2.7　nm.　When　these　catalysts　were　aged,　the　catalysts　prepared　by　the　UAMR　method　exhibited　a　wider　working　window　(Delta　lambda　=　0.284-0.287)　than　impregnated　ones　(Delta　lambda　=　0.065-0.115)　as　well　as　excellent　three-way　catalytic　performance,　and　showed　lower　T-50　(169　degrees　C)　and　T-90　(195　degrees　C)　for　NO　reduction　than　the　aged　catalysts　from　impregnation　processes,　which　were　at　265　and　309　degrees　C,　respectively.　This　implied　that　the　UAMR-separation　precipitation　has　important　potential　for　industrial　applications　to　improve　catalytic　performance　and　thermal　stability.　The　fresh　and　aged　0.7　wt%　Pt　+　0.3　wt%　Rh/Ce0.6Zr0.4O2　catalysts　prepared　by　the　UAMR-separation　precipitation　method　exhibited　better　catalytic　performance　than　the　corresponding　catalysts　prepared　by　conventional　impregnation　routes.