Design of NiO–MgO materials with different properties
文献信息
Marc Serra, Pilar Salagre, Yolanda Cesteros, Francisco Medina, Jesús E. Sueiras
Several NiO–MgO systems were prepared from commercial nickel nitrate hexahydrate and MgO by means of different preparative paths and with two NiO/MgO weight ratios. All the samples were structurally characterized by using BET, XRD, SEM and TPR techniques. These preparative paths lead to NiO–MgO samples with different NiO–MgO interaction degrees, which go from the formation of solid solution until the detection of clearly differentiated NiO and MgO phases by XRD. Samples with solid solution have surface areas in the range 35–51 m2 g−1 and did not show well-defined morphology. The use of an argon flow passing through the sample during the decomposition of the intermediate Ni3(NO3)2(OH)4 phase in the presence of magnesia avoids the solid solution formation and allows to obtain NiO/MgO systems with high surface area (80–90 m2 g−1) with defined octahedral morphology. Also, NiO/MgO systems of about 100 m2 g−1 and without solid solution were obtained by mixing high-area NiO and MgO in n-hexane. Low NiO–MgO interaction involves higher reduction degrees, high surface areas of the systems prepared, and the obtention of well-defined octahedral particles.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.











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