01852nas a2200241   4500008004100000022001400041245009300055210006900148260000800217300001200225490000700237520110600244653001201350653001201362653001701374653001601391653000801407653000801415100002201423700002401445700002901469856011201498       2020                        eng d  a1002-072100aInfluence of cobalt on performance of Cu-CeO2 catalysts for preferential oxidation of CO0 aInfluence of cobalt on performance of CuCeO2 catalysts for prefe  cSEP  a941-9500 v383 a<p>{Copper and cobalt oxides supported on CeO2 were investigated for preferential oxidation of carbon monoxide (CO-PROX) in the presence of excess hydrogen and CO2. (CuO)(1-x)(Co3O4)(x/3)-(CeO2)(2.5) (x = 0, 0.25, 0.50, 0.75, 0.85 and 1) catalysts were prepared by coprecipitation method. These mixed oxide catalysts were characterized by several physicochemical techniques, such as BET surface area (SBET), X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), temperature programmed reduction (TPR) and X-ray photoelectron spectroscopy (XPS). XRD studies show the peaks related to CuO and Co3O4 phases in copper and cobalt containing CeO2 catalysts. The average particle size of the CeO2 crystallites is in the range of 8-10 nm as evaluated from HRTEM studies. XPS studies demonstrate that Cu, Co and Ce in (CuO)(1-x)(Co3O4)(x/3)-(CeO2)(2.5) catalysts are presented in +2 and +1, +3 and +2 and +4 and +3 oxidation states, respectively. The catalyst with x = 0.75 shows better activity and selectivity towards CO-PROX. Though the catalyst with only copper (CuO-CeO2</p>
10aCO-PROX10aCu-CeO210aH2O addition10aMethanation10aXPS10aXRD1 aMalwadkar, Sachin1 aBera, Parthasarathi1 aSatyanarayana, C., V. V.  uhttps://library.ncl.res.in/content/influence-cobalt-performance-cu-ceo2-catalysts-preferential-oxidation-co02331nas a2200253   4500008004100000022001400041245014000055210006900195260000800264300001000272490000700282520143000289653001401719653001701733653002501750653001301775653002701788653001301815653003701828100002201865700002401887700003601911856013001947       2023                        eng d  a1615-684600aLow-temperature preferential CO oxidation in a hydrogen-rich stream over Pt-NaY and modified Pt-NaY catalysts for fuel cell application0 aLowtemperature preferential CO oxidation in a hydrogenrich strea  cFEB  a15-280 v233 a<p>
	Preferential oxidation of CO (CO-PROX) in the hydrogen-rich stream has been carried out over Pt-NaY catalysts containing various Pt loadings along with Fe, Co, and Au. Catalysts have been characterized with inductively coupled plasma-atomic emission spectroscopy, Brunauer, Emmett, and Teller surface area, X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, temperature programmed reduction, and Pt dispersion. CO-PROX activities and CO oxidation selectivities are observed to increase with an increase in Pt content. Pt-NaY catalyst with 0.75 wt.% Pt loading shows maximum CO-PROX activity at low temperatures. An increase in space velocity decreases the CO and O-2 conversions, but CO oxidation selectivity increases. A decrease in activity is observed when reformat gas contains around 20% H2O. During the stability test, no change in CO and O-2 conversions is observed, but a small increase in the CO oxidation selectivity is noticed after 10 h indicating that the Pt-NaY catalyst is a promising candidate for CO-PROX reaction in a hydrogen-rich stream. The Pt-Fe-NaY catalyst shows better activity than the Pt-NaY catalyst but starts deactivating after 10 h. However, activity is observed to decrease over Pt-Co-NaY and Pt-Au-NaY catalysts. Pt-Fe-NaY catalyst with 0.75 and 0.35 wt.% Pt and Fe, respectively, shows better CO-PROX activity at a temperature of 75 degrees C.</p>
10acatalysis10aCO oxidation10aexperimental results10aflow bed10aFuel Cell Applications10aHydrogen10aX-ray photoelectron spectroscopy1 aMalwadkar, Sachin1 aBera, Parthasarathi1 aSatyanarayana, Chilukuri, V. V.  uhttps://library.ncl.res.in/content/low-temperature-preferential-co-oxidation-hydrogen-rich-stream-over-pt-nay-and-modified-pt