Surface basicity on bulk modified phosphorus alumina through different synthesis methods

Literature Information

Publication Date 2011-07-27
DOI 10.1039/C1CP21299K
Impact Factor 3.676
Authors

Xinquan Wang, Liying Song, Yugeng Su, Jun Wang


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Abstract

Bulk modified phosphorus alumina samples were prepared by gel method (GPA) and hydrolysis of phosphide aluminum (HPA). The γ-Al2O3 impregnated by phosphates precursor (IPA) was also compared. The basicity of the samples has been investigated through the CO2 adsorption/desorption processes by in situDRIFT and temperature programmed desorption experiments. It was found that the surface basicity can be adjusted by different location of phosphates species. For the GPA sample, the phosphates species tends to be located in the grain boundaries as they were not stable enough to overcome the structure rearrangement at high temperatures. In contrast, phosphorus was stably anchored in the crystal lattice of HPA sample. Considering the synthesis process of HPA samples, phosphorus changed its valence state from P−3 to P+5 and migrated from anion to cation sites. The anion vacancies left in the lattice facilitated the formation of unsaturated oxygen ions and results in the enhanced basicity.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
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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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