Gerson J. Leonel
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View article: Thermodynamic properties and enhancement of diamagnetism in nitrogen doped lutetium hydride synthesized at high pressure
Thermodynamic properties and enhancement of diamagnetism in nitrogen doped lutetium hydride synthesized at high pressure Open
Nitrogen doped lutetium hydride has drawn global attention in the pursuit of room-temperature superconductivity near ambient pressure and temperature. However, variable synthesis techniques and uncertainty surrounding nitrogen concentratio…
View article: Experimental and Theoretical Evaluation of the Thermodynamics of the Carbonation Reaction of ZIF-8 and Its Close-Packed Polymorph with Carbon Dioxide
Experimental and Theoretical Evaluation of the Thermodynamics of the Carbonation Reaction of ZIF-8 and Its Close-Packed Polymorph with Carbon Dioxide Open
We report the first experimental and theoretical evaluation of the thermodynamic driving force for the reaction of metal-organic framework (MOF) materials with carbon dioxide, leading to a metal-organic carbonate phase. Carbonation upon ex…
View article: Experimental Investigation of Thermodynamic Stabilization in Boron Imidazolate Frameworks (BIFs) Synthesized by Mechanochemistry
Experimental Investigation of Thermodynamic Stabilization in Boron Imidazolate Frameworks (BIFs) Synthesized by Mechanochemistry Open
This study experimentally explores the energetics for the formation of boron-imidazolate frameworks (BIFs), which are synthesized by mechanochemistry. The topologically similar frameworks employ the same tetratopic linker based on tetrakis…
View article: Crystallographic and Compositional Dependence of Thermodynamic Stability of [Co(II), Cu(II), and Zn(II)] in 2-Methylimidazole-Containing Zeolitic Imidazolate Frameworks
Crystallographic and Compositional Dependence of Thermodynamic Stability of [Co(II), Cu(II), and Zn(II)] in 2-Methylimidazole-Containing Zeolitic Imidazolate Frameworks Open
We report the first systematic study experimentally investigating the effect of changes to the divalent metal node on the thermodynamic stability of three-dimensional (3D) and two-dimensional (2D) zeolitic imidazolate frameworks (ZIFs) bas…
View article: Chemistry, structure, and thermodynamic stabilization of SiOC polymer derived ceramics made from commercial precursors
Chemistry, structure, and thermodynamic stabilization of SiOC polymer derived ceramics made from commercial precursors Open
This study explores the energetics and structure of polymer derived ceramics (PDCs) derived from the pyrolysis of preceramic polymers: SPR-212 (SPR), polyhydromethylsiloxane (PHMS) blend, and 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetr…
View article: Compositional Analysis of SiOC(H) Powders: A Comparison of X-ray Photoelectron Spectroscopy (XPS) and Combustion Analysis
Compositional Analysis of SiOC(H) Powders: A Comparison of X-ray Photoelectron Spectroscopy (XPS) and Combustion Analysis Open
Accurate chemical analysis of small samples of fine powders in the Si–O–C–H system is challenging. We present a comparison of analysis by X-ray photoelectron spectroscopy (XPS) and combustion analysis, validating XPS as an accurate and sim…
View article: Thermodynamics of Ni-Fe-Co-Ag pentlandite solid solutions and implications for natural occurrences
Thermodynamics of Ni-Fe-Co-Ag pentlandite solid solutions and implications for natural occurrences Open
Pentlandite is an abundant mineral in magmatic sulfide deposits, but it also occurs in trace amounts in many hydrothermal mineralization settings [1].It is an important global source for nickel and synthetic pentlandite compounds have impo…
View article: Thermodynamic stabilization of crystalline silicon carbide polymer‐derived ceramic fibers
Thermodynamic stabilization of crystalline silicon carbide polymer‐derived ceramic fibers Open
Three crystalline SiC fibers were studied: Tyranno, Hi‐Nicalon, and Sylramic. Thermodynamic stability of the SiC fibers was determined by high temperature oxide melt solution calorimetry. Results shed light on the thermodynamic penalty or …