00802nas a2200217   4500008004100000245010800041210006900149260000800218300001800226490000600244100002400250700002400274700002800298700002100326700002800347700002300375700001700398700002800415700001800443856012300461       2016                        eng d00aNitrogen doping in oxygen-deficient Ca2Fe2O5: a strategy for efficient oxygen reduction oxide catalysts0 aNitrogen doping in oxygendeficient Ca2Fe2O5 a strategy for effic  cNOV  a34387–343950 v81 aJijil, Chamundi, P.1 aLokanathan, Moorthi1 aChithiravel, Sundaresan1 aNayak, Chandrani1 aBhattacharyya, Dibyendu1 aJha, Shambhu, Nath1 aBabu, P., D.1 aKakade, Bhalchandra, A.1 aDevi, Nandini  uhttps://library.ncl.res.in/content/nitrogen-doping-oxygen-deficient-ca2fe2o5-strategy-efficient-oxygen-reduction-oxide02604nas a2200193   4500008004100000022001400041245014700055210006900202260000800271300001200279490000600291520187200297100002402169700002402193700002402217700001702241700002402258856012802282       2018                        eng d  a2398-490200aMechanical activation in reduced graphite oxide/boron nitride nanocomposite electrocatalysts for significant improvement in dioxygen reduction0 aMechanical activation in reduced graphite oxideboron nitride nan  cJAN  a252-2610 v23 a<p>A nanocomposite of reduced graphite oxide (rGO) with hexagonal boron nitride (h-BN) is prepared using a simple hydrothermal method. Significant enhancement in the surface area of the composite is mainly due to the pre-mechanical activation of pristine GO. The structural and morphological study reveals the formation of a homogeneous nanocomposite and masking of rGO sheets over micron sized h-BN particles respectively. Interestingly, the as-synthesized GOBN2-BM composite (nanocomposite of 2 wt% h-BN with mechanically activated GO) catalyst exhibits significant oxygen electroreduction kinetics in terms of onset potential (E-onset = 0.89 V), half-wave potential (E-1/2 = 0.74 V) and limiting current density (J(L) = 4.4 mA cm(-2)) with a single step similar to 4-electron transfer pathway in alkaline medium. Though the composite catalysts exhibit higher overpotential (110 mV) than state-of-the-art Pt/C catalysts, they are much superior to previously reported carbon or h-BN based nanocomposite electrocatalysts. Importantly, the GOBN2-BM nanocomposite shows excellent tolerance towards both methanol oxidation and CO poisoning. Moreover, the nanocomposite catalysts show substantially higher stability than Pt/C catalysts even after 5000 cycles under similar conditions. Additionally, they show a better relative current stability (95% retention) than that of a Pt/C catalyst, signifying immense selectivity and durability towards oxygen electroreduction kinetics. The electrocatalytic oxygen reduction activity of the nanocomposite is mainly attributed to the high surface area (thanks to mechanical activation of GO, leading to increased pore distribution) as well as the synergistic mechanism between the h-BN and carbon network of rGO. Hence, it could be a potential cathode catalyst to replace precious-metal based catalysts in alkaline fuel cells.</p>1 aPatil, Indrajit, M.1 aJijil, Chamundi, P.1 aLokanathan, Moorthi1 aSwami, Anita1 aKakade, Bhalchandra  uhttps://library.ncl.res.in/content/mechanical-activation-reduced-graphite-oxideboron-nitride-nanocomposite-electrocatalysts