01987nas a2200229   4500008004100000022001400041245013900055210006900194260006100263300001000324490000800334520112700342653002001469653001401489653001301503653001901516653001701535653001201552100003201564700003001596856013101626       2007                        eng d  a1011-372X00aFabrication of an effusive molecular beam instrument for surface reaction kinetics - CO oxidation and NO reduction on Pd(111) surfaces0 aFabrication of an effusive molecular beam instrument for surface  a233 SPRING STREET, NEW YORK, NY 10013 USAbSPRINGERcNOV  a50-580 v1193 a<p>A simple molecular beam instrument (MBI) was fabricated for measuring the fundamental parameters in catalysis such as, sticking coefficient, transient and steady state kinetics and reaction mechanism of gas/vapor phase reactions on metal surfaces. Important aspects of MBI fabrication are given in detail. Nitric oxide (NO) decomposition and NO reduction with carbon monoxide (CO) on Pd(111) surfaces were studied. Interesting results were observed for the above reactions and they support the efficiency of the MBI to derive the fundamental parameters of adsorption and catalysis. Sustenance of CO oxidation at 400 K is dependent mostly on the absence of CO-poisoning; apparently, CO + O recombination is the rate determining step &lt;= 400 K. NO adsorption measurements on Pd(111) surface clearly indicating a typical precursor kinetics. Displacement of the chemisorbed CO by NO on Pd(111) surfaces was observed directly with NO + CO beams in the transient kinetics. It is also relatively easy to identify the rate-determining step directly from the MBI data and the same was demonstrated for the above reactions.</p>10acarbon monoxide10acatalysis10akinetics10amolecular beam10anitric oxide10aPd(111)1 aThirunavukkarasu, Kandasamy1 aGopinath, Chinnakonda, S.  uhttps://library.ncl.res.in/content/fabrication-effusive-molecular-beam-instrument-surface-reaction-kinetics-co-oxidation-and-001947nas a2200217   4500008004100000022001400041245007000055210006900125260006900194300001400263490000800277520120500285653002001490653002001510653002201530653001601552100001901568700002101587700002201608856009901630       2009                        eng d  a0379-677900aCO sensor based on polypyrrole functionalized with iron porphyrin0 aCO sensor based on polypyrrole functionalized with iron porphyri  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcJUN  a1019-10230 v1593 a<p>Polypyrrole (PPy) was chemically functionalized with 5,10,15,20-tetraphenyl-21H,23H-porphyrin iron(III) chloride (FeTPPCl) with special interest on noxious carbon monoxide (CO) gas in ppm level. Controlled functionalization of PPy was achieved with incorporation of various concentrations of porphyrin. The resulted semiconducting material was well characterized by different techniques such as UV-vis spectroscopy, FTIR, GFAAS, XRD, and EDAX. The functionalized polypyrrole material on interdigitated electrode was experienced an immediate increase in resistance when exposed to carbon monoxide gas at very low concentration. The CO gas interacted very fast with the FeTPPCl functionalized PPy at room temperature (RT) and then slowly saturated. The response of these materials was not unidirectional, but reverses to the original resistance level when CO was removed from the test chamber. The highest response factor (Delta R/R(0) x 100) and lowest response time (t(50)) obtained are 12 and 169s, respectively. An optimum level of doping (1 mol% of FeTPPCl) was established for the highest sensitivity and the detection level is as low as 100ppm. (C) 2009 Elsevier B.V. All rights reserved.</p>10acarbon monoxide10aChemical sensor10aFe(III) porphyrin10apolypyrrole1 aPaul, Santhosh1 aAmalraj, Francis1 aRadhakrishnan, S.  uhttps://library.ncl.res.in/content/co-sensor-based-polypyrrole-functionalized-iron-porphyrin-001752nas a2200217   4500008004100000022001400041245009200055210006900147260006900216300001200285490000800297520097100305653002001276653002001296653002301316653001601339100001901355700001901374700002201393856011901415       2009                        eng d  a0379-677900aPolypyrrole functionalized with ferrocenyl derivative as a rapid carbon monoxide sensor0 aPolypyrrole functionalized with ferrocenyl derivative as a rapid  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcMAR  a415-4180 v1593 a<p>A rapid carbon monoxide detection system was developed with the electrochemical functioncalization of polypyrrole (PPy) with ferrocenylmethyltrimethylammonium iodide (FTMA-I) as a co-dopant exhibits very high sensitivity to ppm levels of carbon monoxide gas and fast recovery under normal dry room temperature conditions. The co-dopant was synthesized mainly to incorporate into PPy electrochemically to modify the properties in order to sense carbon monoxide (CO) gas. The FTMA-I doped PPy exhibited the characteristics oxidation/reduction peaks for ferrocene in its cyclic voltammograms. The modified PPy films deposited on interdigited electrodes gave rapid sensitivity within a second to 300 ppm carbon monoxide gas and good sensitivity factor was observed even at 4 mmol of the functional groups in the polymer for 300 ppm carbon monoxide gas. This material detected the CO gas concentration as low as 100 ppm. (C) 2008 Elsevier B.V. All rights reserved.</p>10acarbon monoxide10aChemical sensor10aconducting polymer10apolypyrrole1 aPaul, Santhosh1 aChavan, Nayaku1 aRadhakrishnan, S.  uhttps://library.ncl.res.in/content/polypyrrole-functionalized-ferrocenyl-derivative-rapid-carbon-monoxide-sensor-001985nas a2200253   4500008004100000022001400041245010300055210006900158260007700227300001400304490000600318520106600324653002001390653000901410653002801419653001401447653001001461100002601471700002901497700002601526700002601552700003001578856012301608       2014                        eng d  a1867-388000aRole of nanointerfaces in Cu- and Cu plus Au-based near-ambient-temperature CO oxidation catalysts0 aRole of nanointerfaces in Cu and Cu plus Aubased nearambienttemp  aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcNOV  a3116-31240 v63 a<p>Disordered mesoporous Cu-doped ceria-zirconia (Cu0.1Ce0.85Zr0.05O2), and gold deposited (Au/Cu0.1Ce0.85Zr0.05O2) catalysts were synthesized and evaluated for CO oxidation. Onset of CO oxidation activity, and 50% (100%) CO2 formation occurs at room temperature (RT), and 77 (120)degrees C, respectively, with Cu0.1Ce0.85Zr0.05O2. A small amount of gold on Cu0.1Ce0.85Zr0.05O2 induces the sustainable oxidation catalysis around RT. Onset of copper reduction temperature decreases from 110 degrees C on Cu0.1Ce0.85Zr0.05O2 to 48 degrees C with Au/Cu0.1Ce0.85Zr0.05O2, highlighting the direct interaction between Cu and Au through a Cu-Au interface. Au particles with a (00 1) facet deposit on an oxygen-deficient site of (111) facet of CeO2-ZrO2. Any decrease in surface Cu-content with increasing Au-content further supports the Au-Cu-Ce/Zr interface interactions. Nanointerfaces of Au clusters on Cu next to oxygen-deficient sites of CeO2-ZrO2 facilitate all the elementary steps of the CO + O-2 reaction to occur in close proximity at ambient conditions.</p>10acarbon monoxide10aGold10aheterogeneous catalysis10aOxidation10aredox1 aGnanakumar, Edwin, S.1 aNaik, Jarpla, Madhusudha1 aManikandan, Marimuthu1 aRaja, Thirumalaiswamy1 aGopinath, Chinnakonda, S.  uhttps://library.ncl.res.in/content/role-nanointerfaces-cu-and-cu-plus-au-based-near-ambient-temperature-co-oxidation-002884nas a2200301   4500008004100000022001400041245016300055210006900218260000800287300001800295490000800313520181300321653002402134653002002158653001402178653001702192653001202209653002902221653001902250653002802269653003602297653001502333100001602348700002902364700002702393700003002420856013202450       2017                        eng d  a1932-744700aWater mediated deactivation of Co3O4 naonrods catalyst for CO oxidation and resumption of activity at and above 373 K: electronic structural aspects by NAPPES0 aWater mediated deactivation of Co3O4 naonrods catalyst for CO ox  cSEP  a20296–203050 v1213 a<p><span style="color: rgb(51, 51, 51); font-family: arial, helvetica, sans-serif; font-size: 13px; background-color: rgb(248, 248, 248);">The catalytic activity of the Co3O4 nanorods (NRs) for the CO oxidation reaction and the effect of water on the catalytic reaction have been explored with near-ambient pressure photoelectron spectroscopy (NAPPES) and mass spectral analysis. Comparative NAPPES studies have been employed to understand the elucidation of the catalytic reaction pathway and the evolution of various surface species. The results confirm the suppression of the CO oxidation activity on the Co3O4 NRs in the presence of water vapor. Various type of surface species, such as CO(ads), hydroxyl, carbonate, formate, are found to be present on the catalyst surface depending on the reaction conditions. Vibrational features of CO, O-2, and CO, were observed and shift in binding energy of these features under the reaction conditions directly suggests a change in work function of the catalyst surface. Under dry conditions, CO couples with labile 0 atoms to form CO2; however, under wet conditions, CO predominantly interacts with surface OH groups resulting in the formation of carbonate and formate intermediates. In situ studies of oxidation of CO on Co3O4 shows that CO oxidation depends not only on surface Co3+ concentration but also influenced by Co-3/Co' ratio on the catalyst surface. The carbonate was found to be a reaction inhibitor at room temperature; however, it acts as an active intermediate at 375 K and above. Above the boiling point of water, Co3O4 NR surfaces begin to show the oxidation activity even in the presence of water vapor. The intrinsic role of intermediate species was used to derive a possible reaction mechanism under different reaction conditions.</span></p>10aAmbinent-temprature10acarbon monoxide10aGas Shift10aH Activation10aIn-situ10aLow-temprature oxidation10aMolecular-beam10aPerformance enhancement10aRay Photoelectron-Spectroscopyu10aThin-films1 aJain, Ruchi1 aReddy, Kasala, Prabhakar1 aGhosalya, Manoj, Kumar1 aGopinath, Chinnakonda, S.  uhttps://library.ncl.res.in/content/water-mediated-deactivation-co3o4-naonrods-catalyst-co-oxidation-and-resumption-activity-and01319nas a2200229   4500008004100000022001400041245015400055210006900209260000800278300001200286490000600298520046800304653002000772653002300792653002100815653002400836653002300860100002500883700002500908700003100933856012500964       2020                        eng d  a2194-428800aMechanistic aspects of methanol electro-oxidation reaction through cyclic voltammetry: is it correct to blame carbon monoxide for catalyst poisoning?0 aMechanistic aspects of methanol electrooxidation reaction throug  cMAY  a19009550 v83 a<p>The mechanism of the methanol oxidation reaction is revisited using systematic cyclic voltammetric studies. These studies clearly indicate that the peak during the cathodic scan belongs mainly to electro-oxidation of the carbon monoxide, and that only a fraction of this carbon monoxide remains adsorbed on the electrode, contrary to what previous reports suggested. More details can be found in article number by Bhagavatula L. V. Prasad and co-workers.</p>
10acarbon monoxide10acyclic voltammetry10aelectrocatalysts10aelectrode poisoning10aMethanol oxidation1 aDeshpande, Pooja, S.1 aChaudhari, Vijay, R.1 aPrasad, Bhagavatula, L. V.  uhttps://library.ncl.res.in/content/mechanistic-aspects-methanol-electro-oxidation-reaction-through-cyclic-voltammetry-it