02139nas a2200241   4500008004100000022001100041245012700052210007100179260000900250300001000259490000800269520128500277653001801562653001701580653003901597653002001636100001901656700001801675700001801693700001901711700003301730856013401763       2018                        eng d  a21951700aTuning the dimensionality of layered Srn+1Tin−xNixO3n+1 perovskite structures for improved activity in syngas generation0 aTuning the dimensionality of layered Srn1Tin−xNixO3n1 perovskite  cAPR   a27-390 v3603 a<p>Interest in perovskite type oxides is growing due to their versatile catalytic applications. A series of Ruddlesden-Popper (RP) type layered perovskite oxides Srn+1Tin−xNixO3n+1 were prepared and evaluated for their catalytic activity in steam reforming, CO2 reforming and bi-reforming of methane. These materials, prepared through citrate gel method were characterized to understand their structure and Ni reducibility. Substitution of Ni in RP phases was established through refinement of XRD powder pattern. During methane reforming, the catalytic activity increased with the order of RP phase of SrTi1−xNixO3−δ (n = ∞). TPR results show variation in Ni reducibility with the order of RP phase, while TPD-O2 study helped to estimate oxygen vacancies. These vacancies seem to influence catalytic activity during methane reforming. Transient pulse experiments show that CO2 dissociates over oxygen vacancies to give CO and oxygen, with later replenishing lattice oxygen in SrTi0.8Ni0.2O3−δ (n = ∞) phases. Highly labile oxygen vacancies generated in the bulk of SrTi0.8Ni0.2O3−δ must be migrating to the surface, helping in the removal of coke formed. Characterization of catalysts after reaction helped in better understanding of coke precursors.</p>10aDry reforming10aNickelSyngas10aRuddlesden-Popper (RP) perovskites10aSteam reforming1 aDama, Srikanth1 aGhodke, Seema1 aBobade, Richa1 aGurav, Hanmant1 aChilukuri, Satyanarayana, V.  uhttps://library.ncl.res.in/content/tuning-dimensionality-layered-srn1tin%E2%88%92xnixo3n1-perovskite-structures-improved-activity