Elucidation of structure and nature of the PdO–Pd transformation using in situ PDF and XAS techniques
Literature Information
Jonathan Keating, Gopinathan Sankar, Timothy I. Hyde, Shinji Kohara, Koji Ohara
The PdO–Pd phase transformation in a 4 wt% Pd/Al2O3 catalyst has been investigated using in situ X-ray absorption spectroscopy (XAS) and in situ X-ray total scattering (also known as high-energy X-ray diffraction) techniques. Both the partial and total pair distribution functions (PDF) from these respective techniques have been analysed in depth. New information from PDF analysis of total scattering data has been garnered using the differential PDF (d-PDF) approach where only correlations orginating from PdO and metallic Pd are extracted. This method circumvents problems encountered in characerising the catalytically active components due to the diffuse scattering from the disordered γ-Al2O3 support phase. Quantitative analysis of the palladium components within the catalyst allowed for the phase composition to be established at various temperatures. Above 850 °C it was found that PdO had converted to metallic Pd, however, the extent of reduction was of the order ca. 70% Pd metal and 30% PdO. Complementary in situ XANES and EXAFS were performed, with heating to high temperature and subsequent cooling in air, and the results of the analyses support the observations, that residual PdO is detected at elevated temperatures. Hysteresis in the transformation upon cooling is confirmed from XAS studies where reoxidation occurs below 680 °C.
Recommended Journals

European Journal of Wood and Wood Products

Journal of Physics and Chemistry of Solids

Pure and Applied Chemistry

Journal of Organometallic Chemistry

Planta Medica

Molecular Pharmacology

Pharmacological Reviews

Science Progress

Proceedings of the National Academy of Sciences of the United States of America

Journal of Heterocyclic Chemistry
Related Literature
A turn-on homodimer fluorescent probe based on homo-FRET for the sensing of biothiols in lysosome: a trial of a new turn-on strategy
Ying-Jie Tang, Wen-Le Fang, Kui Ren, Xiao-Feng Guo, Hong Wang
DOI: 10.1039/D1AN00161B
Determination of selenium in steel by flame atomic absorption spectrometry
DOI: 10.1039/JA9860100309
A colorimetric aptasensor for the simple and rapid detection of human papillomavirus type 16 L1 proteins
Li Zhu, Yu Zhao, Shangchen Yao, Mingzhe Xu, Lihui Yin, Xihai Zhai, Xu Teng
DOI: 10.1039/D1AN00251A
Rational design of water-dispersible and biocompatible nanoprobes with H2S-triggered NIR emission for cancer cell imaging
Hengyan Liu, Ge Xu, Tianli Zhu, Rongchen Wang, Jiahui Tan, Chunchang Zhao, Xianfeng Gu
DOI: 10.1039/D0TB00173B
O species-decorated graphene shell encapsulating iridium–nickel alloy as an efficient electrocatalyst towards hydrogen evolution reaction
Shipeng Gong, Changlai Wang, Peng Jiang, Kang Yang, Jian Lu, Minxue Huang, Shi Chen, Junzheng Wang
DOI: 10.1039/C9TA04361F
PD-L1 aptamer isolation via Modular-SELEX and its applications in cancer cell detection and tumor tissue section imaging
Jiyuan Li, Xijiao Ren, Jiaxing Zhao, Xinhui Lou
DOI: 10.1039/D1AN00182E
An integrated self-powered 3D printed sample concentrator for highly sensitive molecular detection of HIV in whole blood at the point of care
Karteek Kadimisetty, Aoife M. Roche, Yanjie Yi, Frederic D. Bushman, Liang Feng
DOI: 10.1039/D0AN02482A
MXene and black phosphorus based 2D nanomaterials in bioimaging and biosensing: progress and perspectives
Zhenyu Gu, Jianguo Zhang, Dan Zhang, Han Zhang, Zhigang Yang, Junle Qu
DOI: 10.1039/D1TB00410G
You might also like
What is the market or research trend for N-(4-Methoxybenzyl)-2-pyridinamine (CAS: 52818-63-0)?
N-(4-Methoxybenzyl)-2-pyridinamine (CAS: 52818-63-0) is increasingly being used ...
What precautions should be taken when handling Ethyl 4-(2-chlorophenyl)-1,3-thiazole-2-carboxylate (CAS: 1050507-06-6)?
When handling Ethyl 4-(2-chlorophenyl)-1,3-thiazole-2-carboxylate, appropriate p...
What regulatory guidelines apply to diethyldiselane (CAS: 628-39-7)?
Diethyldiselane (CAS: 628-39-7) is classified under the Globally Harmonized Syst...
What is the market or research trend for oxocopper (CAS: 12053-18-8)?
The market for oxocopper (CAS: 12053-18-8) is primarily driven by its use in cat...
What is the market or research trend for 5-{[(2-Methyl-2-propanyl)oxy]carbonyl}-5-azaspiro[2.4]heptane-7-carboxylic acid?
The market for 5-{[(2-Methyl-2-propanyl)oxy]carbonyl}-5-azaspiro[2.4]heptane-7-c...
What is 2-(1-Pyrrolidinyl)-4-pyridinamine (CAS: 35981-63-6)?
2-(1-Pyrrolidinyl)-4-pyridinamine is a chemical compound with the CAS number 359...
What are the physical and chemical properties of 2-(3-Pyridinyl)-1-azabicyclo[2.2.2]octane (CAS: 91556-75-1)?
2-(3-Pyridinyl)-1-azabicyclo[2.2.2]octane (CAS: 91556-75-1) is a crystalline sol...
How is (S)-Alpha-allyl-proline hydrochloride (CAS: 129704-91-2) typically synthesized?
(S)-Alpha-allyl-proline hydrochloride is usually synthesized via a Wittig reacti...
What is 3-Methyl-1,2-oxazole-5-carboxylic acid (CAS: 4857-42-5)?
3-Methyl-1,2-oxazole-5-carboxylic acid (CAS: 4857-42-5) is an organic compound w...
How is Lys-SMCC-DM1 (CAS: 1281816-04-3) typically synthesized?
Lys-SMCC-DM1 is synthesized via a multi-step process involving the coupling of S...
Source Journal
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.


![1-oxaspiro[4.4]nonan-6-one structure 1-oxaspiro[4.4]nonan-6-one structure](https://static.chemtradehub.com/structs/134/134179-01-4-e051.webp)
![N-{15-[(2,5-Dioxo-1-pyrrolidinyl)oxy]-15-oxo-3,6,9,12-tetraoxapentadec-1-yl}-2-(2-propyn-1-yloxy)acetamide structure N-{15-[(2,5-Dioxo-1-pyrrolidinyl)oxy]-15-oxo-3,6,9,12-tetraoxapentadec-1-yl}-2-(2-propyn-1-yloxy)acetamide structure](https://static.chemtradehub.com/structs/210/2101206-92-0-2eb5.webp)
