9 documents found, page 1 of 1

Catalysis of ceria incorporated magnesium hydride: a follow up study

In continuation with the results explored in our recent previous study (https://doi.org/10.1016/j.apsusc.2021.150062), the current work sheds more light regarding the active in situ catalytic species in ceria additive loaded hydrogen storage system, MgH2. For this study, two samples, MgH2+0.167CeO2 and MgH2+0.5CeO2 were processed through mechanical milling (5 h/200 rpm) and tests were conducted at various stage...

Unravelling the effects of calcium substitution in BaGd2CoO5 Haldane gap 1D mat...

Ecobenign and high-temperature-stable oxides are considered a promising alternative to traditional Bi2Te3-, Bi2Se3-, and PbTe-based thermoelectric materials. The quest for high-performing thermoelectric oxides is still open and, among other challenges, includes the screening of various materials systems for potentially promising electrical and thermal transport properties. In this work, a new family of acceptor...

Highly branched Pt Cu nanodandelion with high activity for oxygen reduction rea...

A facile hydrothermal route has been developed to synthesize the highly branched Pt58Cu42 nanoparticles via mixing the H2PtCl6 and CuCl2 with octadecylamine. The Pt58Cu42 after post treatment forms a dandelion flower 3-D structure. A combination of both the branched shape and PtCu composition effects in the Pt58Cu42-nanoparticles shows superior electrocatalytic activity and durability to commercial Pt black for...

Chemically transformed additive phases in Mg2TiO4 and MgTiO3 loaded hydrogen st...

The present work deals with a comparative study of Mg2TiO4, MgTiO3 and titania additives incorporated MgH2. Hydrogen storage measurements suggest that all these additives improve the hydrogen desorption/absorption performance of MgH2. X-ray diffraction (XRD) and X ray photoelectron spectroscopy (XPS) studies highlight that rock salt phases consisting of highly reduced Ti exist in the samples. These results reit...

Evolution of reduced Ti containing phase(s) in MgH2/TiO2 system and its effect ...

Conductivity recovery by redox cycling of yttrium doped barium zirconate proton...

Formation of MgxNbyOx+y through the Mechanochemical Reaction of MgH2 and Nb2O5,...

The present study aims to understand the catalysis of the MgH2-Nb2O5 hydrogen storage system. To clarify the chemical interaction between MgH2 and Nb2O5, the mechanochemical reaction products of a composite mixture of MgH2+0.167Nb(2)O(5) was monitored at different time intervals (2, 5, 15, 30, and 45min, as well as 1, 2, 5, 10, 15, 20, 25, and 30h). The study confirms the formation of catalytically active Nb-do...

Two step mechanochemical synthesis of Nb doped MgO rock salt nanoparticles and ...

In the present study, we demonstrate two mechanochemical approaches suitable for the bulk scale synthesis of catalytically active Nb doped MgO rock salt nanoparticles. In the first method, Nb2O5 initially was reduced to NbO2 by MgH2 and then transformed to MgxNbyOx+y. In the second method, MgO and Nb2O5 were initially combined to make MgNb2O6 and then converted to MgxNbyOx+y. The DSC-TG and Sievert's volumetric...

Synthesis of catalytically active rock salt structured MgxNb1-xO nanoparticles ...

This communication deals with the ex-situ synthesis of rock salt type MgxNb1-xO whose structural characteristics are closely related with MgO. XRD examination of 30 h ball milled MgH2 + Nb2O5 confirms the formation of a rock salt product MgxNb1-xO, which is comparable to the recently reported active catalyst MgxNb1-xO formed in-situ in MgH2 milled with 8 mol.% Nb2O5. It is shown that MgH2 catalyzed with the pre...