The surface exchange and bulk transport of oxygen are highly relevant to ceria-based redox materials, which envisaged for the solar thermochemical splitting carbon dioxide in future. Experimental investigations isotope on CeO2-δ, Ce0.9M3+0.1O1.95-δ (with M3+ = Y, Sm) Ce0.9M4+0.1O2-δ M4+ Zr) samples were carried out first time utilizing oxygen-isotope-enriched C18O2 gas atmospheres as tracer sou...

A series of benzoxazine monomer supramolecules with different substituted groups on their benzene ring was prepared with a Mannich reaction and characterized by FTIR, 1H-NMR and MS. The obtained products were 3,4-dihydro-3-(2'-hydroxyethylene)-6-methyl-2H-benzoxazine (BM1), 3,4-dihydro-3-(2'-hydroxyethylene)-6-ethyl-2H-benz-oxazine (BM2), and 3,4-dihydro-3-(2'-hydroxyethylene)-6-methoxy-2H-benz...

Nanostructured doped ceria is a prospective material for catalytic applications such as the construction of membranes with mixed electronic and ionic conductivity for effective syngas production. In this article, the surface properties of nanostructured ceria doped with praseodymium have been studied by X-ray photoelectron spectroscopy, secondary ion mass spectrometry, and Fourier transform inf...

We investigate the interaction and distribution of defects in doped non-stoichometric ceria Ce1-xRExO2-x/2-δ (with RE = Lu, Y, Gd, Sm, Nd, and La) by combining DFT+U calculations and Monte Carlo simulations. The concentrated solution of defects in ceria is described by the pair interactions of dopant ions, oxygen vacancies, and small polarons. The calculated interaction energies for polarons an...

This paper reviews recent work on SOFC anode fabrication at the University of Pennsylvania. In this work, anode fabrication is based on the preparation of a porous YSZ matrix, into which electronic and catalytic components are added by impregnation of the appropriate metal salts. First, the methods used to prepare porous YSZ are described, along with a description of the structures that are obt...

Formic acid is a promising hydrogen carrier owing to its high density and liquid phase. Therefore, the production of from formic via catalytic dehydrogenation reaction has been extensively studied. Various methods such as alloying active Pd metal with other metals adding dopants (e.g., amine-functional group, nitrogen, or oxide) have suggested enhance activities for dehydrogenation. In this stu...

Pendahuluan: Kecemasan hospitalisasi merupakan suatu keadaan krisis pada anak sakit yang harus menjalani rawat inap karena proses adaptasi terhadap stressor lingkungan baru, orang asing, ketakutan dan prosedur keperawatan menyakitkan. Sebesar 80% toddler dirawat di SMC RS Telogorejo Semarang menunjukkan kecemasan akibat berupa saat melihat perawat, menangis, menendang, memberontak, serta memuku...

Ceria has proven to be an excellent ion-transport and ion-exchange material when used in polycrystalline form with a high-concentration of aliovalent doped cations. Despite its widespread application, the impact atomic-scale defects this are scarcely studied poorly understood. In article, using first-principles simulations, we provide fundamental understanding atomic-structure, thermodynamic st...

T he role of Sm addition on water gas shift performance Re/ceria was studied. A redox cycle between Ce4+ and Ce3+ ceria support by oxygen vacancies generation is one the elementary step in mechanism. In this work, we have attempted to enrich content at surface Re/doped enhance performance. The reaction carried out over Re/Sm-doped catalysts with different contents (0, 5, 10, 15 wt%). H2-TPR exp...