02322nas a2200313 4500008004100000022001400041245010700055210006900162260011000231300001400341490000700355520118000362653002901542653001401571653002301585653002001608653001801628653002201646653001601668653002801684653003001712653002301742653001101765100002301776700001801799700002701817700003301844856013101877 2012 eng d a0376-471000aCarbon dioxide reforming of methane over ruthenium substituted strontium titanate perovskite catalysts0 aCarbon dioxide reforming of methane over ruthenium substituted s aDR K S KRISHNAN MARG, PUSA CAMPUS, NEW DELHI 110 012, INDIAbNATL INST SCIENCE COMMUNICATION-NISCAIRcSEP a1339-13470 v513 a

Strontium titanate (SrTiO3) doped with varying amounts of ruthenium (7.9, 15.6 and 31 wt%) have been prepared by the citrate gel synthesis method. Structural and textural characterizations reveal that at lower concentrations, a major part of Ru is incorporated in the lattice of SiTiO3. The content of surface Ru (outside lattice) increases with increasing amounts of the doped Ru. The surface Ru reduced at lower temperatures compared to Ru incorporated into the lattice. The reduction of the lattice substituted Ru occurs only at temperatures above the collapse of the perovskite structure. The catalyst sample with 7.9 wt% of Ru shows good conversions in the dry reforming of methane with CO2. The conversion of CO2 is in excess compared to methane under the studied reaction conditions. As a result, H-2/CO ratio of the product gases which should have been equivalent to unity is lower than the stoichiometric value. This ratio is particularly low when lower reaction temperatures (873-973 K) were used. Similar was the case when high space velocities were used. Low methane conversion and reverse water gas shift reaction are the causes for the low H-2/CO ratios.

10aCarbon dioxide reforming10aCatalysts10aCitrate gel method10aDoped catalysts10aDry reforming10aMethane reforming10aPerovskites10aReverse water gas shift10aRuthenium doped catalysts10aStrontium titanate10aSyngas1 aGurav, Hanmant, R.1 aBobade, Richa1 aDas, Vineetha, Lakshmi1 aChilukuri, Satyanarayana, V. uhttps://library.ncl.res.in/content/carbon-dioxide-reforming-methane-over-ruthenium-substituted-strontium-titanate-perovskite-001541nas a2200193 4500008004100000022001400041245015600055210006900211260011000280300001600390490000600406520068300412100002401095700002301119700002201142700003301164700002301197856012701220 2016 eng d a2046-206900aHighly efficient nitrogen-doped hierarchically porous carbon supported Ni nanoparticles for the selective hydrogenation of furfural to furfuryl alcohol0 aHighly efficient nitrogendoped hierarchically porous carbon supp aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL a67662-676680 v63 a

Nickel nanoparticles supported on nitrogen doped hierarchically porous carbon (Ni/CN) are found to be highly efficient and reusable catalysts for the selective hydrogenation of biomass-derived furfural to furfuryl alcohol (FA). Various characterization methods were used to study the structural and morphological features of the catalysts. Furfural conversion of 96% and 95% FA selectivity was obtained using a 5 wt% Ni/CN catalyst. This catalyst showed excellent recyclability without any loss in activity and FA selectivity when it was reused four times. The higher catalytic performance is attributed to the nitrogen incorporated hierarchical porous 3D carbon network.

1 aKotbagi, Trupti, V.1 aGurav, Hanmant, R.1 aNagpure, Atul, S.1 aChilukuri, Satyanarayana, V.1 aBakker, Martin, G. uhttps://library.ncl.res.in/content/highly-efficient-nitrogen-doped-hierarchically-porous-carbon-supported-ni-nanoparticles02208nas a2200169 4500008004100000245013400041210006900175260000800244300001200252490000700264520154800271100002301819700001901842700001901861700002901880856012901909 2017 eng d00aInfluence of preparation method on activity and stability of Ni catalysts supported on Gd doped ceria in dry reforming of methane0 aInfluence of preparation method on activity and stability of Ni  cJUL a357-3670 v203 aNickel catalysts supported on Gd doped ceria (NGDC), with various Ni content, were prepared through different preparation routes and evaluated for dry reforming of methane (DRM). Their detailed characterization revealed that method of preparation plays an important role in Ni dispersion, with catalysts prepared through co-precipitation showing high Ni dispersion. The co-precipitated 12NGDC-cp catalyst with 12 wt% NiO was found to be superior in terms of high CO2 and CH4 conversions compared to catalysts prepared through citrate gel or impregnation methods Even H-2 and CO yields are high on this catalyst, while it shows excellent durability with stable activity even after 100 h on-stream. Thermogravimetric analysis of spent catalyst showed presence of coke, with transmission electron microscopic studies pointing to the presence of Ni crystallites at the mouth of the carbon whiskers. These Ni crystallites appear to be still active for DRM reaction. Among the spent catalysts, the carbon formation was high on catalysts that have bigger Ni crystallites, with the catalysts prepared through impregnation and citrate gel methods having higher coke. Investigations also reveal that the conversion of active (amorphous) carbon into stable (graphitic) carbon depends on the Ni crystallite size, temperature and duration of the reaction. These studies demonstrate that Gd doped ceria is a good support for Ni, to obtain high DRM activity and very good on-stream stability provided the catalysts are prepared through an appropriate method.1 aGurav, Hanmant, R.1 aDama, Srikanth1 aSamuel, Violet1 aChilukuri, Satyanarayana uhttps://library.ncl.res.in/content/influence-preparation-method-activity-and-stability-ni-catalysts-supported-gd-doped-ceria02611nas a2200181 4500008004100000245010600041210006900147260000800216300001200224490000800236520194800244100001902192700002202211700001802233700002302251700002902274856012602303 2018 eng d00aActive and durable alkaline earth metal substituted perovskite catalysts for dry reforming of methane0 aActive and durable alkaline earth metal substituted perovskite c cMAY a146-1580 v2243 aDry reforming of methane is an important process for the utilization of CO2 and to get valuable synthesis gas. Alkaline earth metal substituted MZr1-xNixO3-delta perovskites were synthesized by citrate gel method, characterized and evaluated for dry reforming methane. Characterization results show that the type of alkaline earth substituted at the A site of the perovskite oxide plays an important role in terms of structure, basicity, oxygen deficiency and Ni dispersion. Calcium substituted CaZr0.8Ni0.2O3-delta catalyst shows superior activity in terms of high CH4 and CO2 conversion, while maintaining the activity even after 500 h of reaction. Mechanistic investigations were carried out using transient pulse experiments and insitu FTIR-diffuse reflectance spectroscopy. These experiments reveal that redox property and basicity play important role in activation and sustaining the reforming reaction. Insitu FTIR measurements show that surface hydroxyl groups of the support are vital for high activity and durability of CaZr0.8Ni0.2O3-delta catalyst. XRD and TGA analysis of catalysts after reaction show the structures are retained, but peaks pertaining to coke were observed on SrZr0.8Ni0.2O3-delta and BaZr0.8Ni0.2O3-delta catalysts. On the otherhand, CaZr0.8Ni0.2O3-delta catalyst had only amorphous carbon even after 500 h of reaction. HRTEM studies revealed that SrZr0.8Ni0.2O3-delta and BaZr0.8Ni0.2O3-delta catalysts deactivated mostly due to the formation of carbon nanotubes with Ni embedded in them. Raman and XPS analysis helped in identifying types of coke precursors present on the catalysts. The investigation also illustrate that type of carbon formed depends on the basicity of perovskite oxide, metal to support interaction, Ni crystallite size, surface hydroxyl groups and oxygen defects. This study clearly demonstrated that CaZr0.8Ni0.2O3-delta is an excellent catalyst for dry reforming reaction with long life.1 aDama, Srikanth1 aGhodke, Seema, R.1 aBobade, Richa1 aGurav, Hanmant, R.1 aChilukuri, Satyanarayana uhttps://library.ncl.res.in/content/active-and-durable-alkaline-earth-metal-substituted-perovskite-catalysts-dry-reforming01845nas a2200181 4500008004100000022001300041245009200054210007100146260000900217300001400226490000600240520119100246100002701437700002201464700002301486700002801509856012601537 2018 eng d a2365654900aSpinel‐type mixed oxides for stable and selective partial oxidation of benzyl alcohol0 aSpinel‐type mixed oxides for stable and selective partial oxidat cAPR  a3751-37610 v33 a

Benzaldehyde is an important chemical intermediate, which need to be prepared through an eco‐friendly process. Manganese oxides are active as catalysts for its preparation through partial oxidation of benzyl alcohol. In this study, Cu, Co and Mn containing spinel based mixed oxides (CuxMn3−xO4) were prepared and tested for partial oxidation of benzyl alcohol to get benzaldehyde with high selectivity. The catalytic activity strongly depended on chemical composition, acid‐base properties and oxygen uptake. The influence of chemical composition, reaction temperature, oxygen partial pressure and the weight hourly space velocity (WHSV) were investigated to optimize benzaldehyde yield and to stabilize the catalyst activity. A high benzaldehyde selectivity of 98%, accompanied with benzyl alcohol conversion of 84.5% was obtained over Cu0.25Mn2.75O4 catalyst at 300 °C. It was evident from temperature programmed desorption (TPD) of CO2 that this catalyst was found to have optimum basicity and high oxygen uptake, thus imparting high activity and stability. Activity and catalyst life could be attributed to appropriate acid‐base properties. Supporting Information

1 aGurrala, Lakshmiprasad1 aNagpure, Atul, S.1 aGurav, Hanmant, R.1 aChilukur, Satyanarayana uhttps://library.ncl.res.in/content/spinel%E2%80%90type-mixed-oxides-stable-and-selective-partial-oxidation-benzyl-alcohol