Determination of the nature and reactivity of copper sites in Cu–TiO2catalysts
文献情報
Fernando Coloma, Francisco Marquez, Colin H. Rochester, James A. Anderson
XPS, temperature programmed reduction (TPR) and FTIR spectroscopy of adsorbed CO and the hydrogenation of crotonaldehyde were used to study the nature of the surface species present for two Cu–TiO2 catalysts (2 and 5% Cu) subjected to reduction in hydrogen at 523, 623 and 723 K. Despite TPR and XPS evidence for complete reduction, IR studies gave clear evidence for the presence of surface Cu(II) ions and two distinct types of Cu(I) sites. The large absorption coefficient for CO on the latter meant that spectra were dominated by bands due to CO on Cu+ even though these ions made up less than an estimated 10% of the total exposed copper sites. Exposed Cu+ remained after re-oxidation treatment, at 623 K in oxygen but this treatment, when followed by 523 K reduction, did not recover Cu(0) sites lost by high temperature reduction, indicating that sintering rather than encapsulation by TiOx was responsible for loss of copper surface area.
関連文献
Construction of extended networks with a trimeric pyrazole synthon
Ishtvan Boldog, Eduard B. Rusanov, Joachim Sieler, Steffen Blaurock, Konstantin V. Domasevitch
DOI: 10.1039/B212540D
Formation and destruction of the guanine quartet in solution observed by cold-spray ionization mass spectrometry
Shigeru Sakamoto, Isao Saito
DOI: 10.1039/B212432G
A novel bioassay for screening and quantification of taxanes
Sergi Morais, P. C. Pandey, Wilfred Chen, Ashok Mulchandani
DOI: 10.1039/B302112B
Fluoride-induced chemiluminescent decomposition of 1,2-dioxetanes bearing a phenyl moiety substituted with a methyl having an electron-withdrawing group
Masakatsu Matsumoto, Toshiyuki Mizuno, Nobuko Watanabe
DOI: 10.1039/B210857G
Electrochemically tuneable hydrogen bonding interactions between a phenyl-urea terminated dendrimer and phenanthrenequinone
Graeme Cooke, Vladimir Sindelar, Vincent M. Rotello
DOI: 10.1039/B211370H
Ion-exchange synthesis and magneto-optical spectra of colored magnetic thin films composed of metal(ii) hexacyanochromate(iii)
Masanori Tozawa, Norimichi Kojima, Kazuhito Hashimoto
DOI: 10.1039/B212861F
Identification of novel sulfur-containing derivatives of chlorophyll a in a Recent sediment
Angela H. Squier, Dominic A. Hodgson, Brendan J. Keely
DOI: 10.1039/B212243J
The first example of direct oxidation of sulfides to sulfones by an osmate molecular oxygen system
Boyapati M. Choudary, Chinta Reddy V. Reddy, Billakanti V. Prakash, Mannepalli L. Kantam, B. Sreedhar
DOI: 10.1039/B212749K
Fraction of the CoMoS phases accessible to NO in Co–Mo hydrodesulfurization catalysts
Yasuaki Okamoto, Masatoshi Kawano, Takeshi Kubota
DOI: 10.1039/B301487H
Halogen-induced selectivity in heterogeneous epoxidation is an electronic effect—fluorine, chlorine, bromine and iodine in the Ag-catalysed selective oxidation of ethene
Richard M. Lambert, Rachael L. Cropley, Alifiya Husain, Mintcho S. Tikhov
DOI: 10.1039/B302620E
こちらもおすすめ
2-ブロモ-9,9-ジフェニル-9H-フルオレンの主な用途は何ですか?
2-溴-9,9-二苯基芴は、医薬品、工業材料、有機合成の研究分野で応用されます。特に、レーザー材料や機能性ポリマーの合成に使用されることがあります。また、蛍光色...
四氯化铱の市場動向や研究トレンドはどうですか?
四氯化铱の市場は研究開発分野で注目されており、特にナノ技術や金属有機框架(MOFs)の分野での需要が増加傾向にあります。価格は安定しており、中国や韓国での生産が...
1-(4-溴-3-氟苯基)-2-氯乙酮を含む廃棄物はどのように処理すべきですか?
1-(4-溴-3-氟苯基)-2-氯乙酮 (CAS番号: 1260857-14-4) の廃棄物は専門的な廃棄処理が必要です。まず、廃棄物は密閉された容器に収集し、...
苦参酚Kとは何ですか?
苦参酚Kは、CAS番号101236-49-1を持つ化合物で、主に天然由来の生薬から抽出されます。この化合物は、抗炎症作用や抗癌作用を持つことが報告されています。
POTASSIUM (1-(TERTBUTOXYCARBONYL)AZETIDIN-3-YL)TRIFLUOROBORATE を含む廃棄物はどのように処理すべきですか?
POTASSIUM (1-(TERTBUTOXYCARBONYL)AZETIDIN-3-YL)TRIFLUOROBORATE を含む廃棄物は、まず安全なエント...
4-庚基-4’-联苯羧酸の市場動向や研究トレンドはどうですか?
4-庚基-4’-聯苯羧酸は、特殊化学品や合成化学の分野で用いられる化学物質ですが、市場動向としては、研究開発の進展とともに需要が増加しています。また、環境配慮型...
6-ブロモ-3-メトキシ-1-フェニル-1H-インドゾールを含む廃棄物はどのように処理すべきですか?
6-ブロモ-3-メトキシ-1-フェニル-1H-インドゾールを含む廃棄物は、適切な化学廃棄処理が必要です。通常、廃棄物は密閉容器に収集され、専門の廃棄処理業者に引...
4,4-二甲基-2-吡咯烷酮はどの業界で使用されていますか?
4,4-二甲基-2-吡咯烷酮は医薬、ポリマー、センサー、半導体などの業界で広く使用されています。特に溶媒としての性能が高く評価されています。
掲載誌
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.














