CO bond cleavage on supported nano-gold during low temperature oxidation

文献信息

发布日期 2010-12-10
DOI 10.1039/C0CP01852J
影响因子 3.676
作者

Albert F. Carley, David J. Morgan, Nianxue Song, M. Wyn Roberts, Stuart H. Taylor, Jonathan K. Bartley, David J. Willock, Kara L. Howard, Graham J. Hutchings


查看原文

摘要

The oxidation of CO by Au/Fe2O3 and Au/ZnO catalysts is compared in the very early stages of the reaction using a temporal analysis of products (TAP) reactor. For Au/Fe2O3 pre-dosing the catalyst with 18O labelled water gives an unexpected evolution order for the labelled CO2 product with the C18O2 emerging first, whereas no temporal differentiation is found for Au/ZnO. High pressure XPS experiments are then used to show that CO bond cleavage does occur for model catalysts consisting of Au particles deposited on iron oxide films but not when deposited on ZnO films. DFT calculations, show that this observation requires carbon monoxide to dissociate in such a way that cleavage of the CO bond occurs along with dynamically co-adsorbed oxygen so that the overall process of Au oxidation and CO dissociation is energetically favourable. Our results show that for Au/Fe2O3 there is a pathway for CO oxidation that involves atomic C and O surface species which operates along side the bicarbonate mechanism that is widely discussed in the literature. However, this minor pathway is absent for Au/ZnO.

相关文献

Membrane packing defects in synaptic vesicles recruit complexin and synuclein

Jie Liu, Bing Bu, Michael Crowe, Dechang Li, Jiajie Diao, Baohua Ji

2020-12-18 Paper

DOI: 10.1039/D0CP03546G

Stability and superconductivity of Ca-intercalated bilayer blue phosphorene

Artur P. Durajski, Kamil M. Skoczylas, Radosław Szczęśniak

2021-01-05 Paper

DOI: 10.1039/D0CP05984F

New insights on the ESIPT process based on solid-state data and state-of-the-art computational methods

Jean Nunes Laner, Henrique de Castro Silva Junior, Fabiano Severo Rodembusch, Eduardo Ceretta Moreira

2020-12-14 Paper

DOI: 10.1039/D0CP05502F

New atomic-scale insights into the I/Ni(100) system: phase transitions and growth of an atomically thin NiI2 film

T. V. Pavlova, B. V. Andryushechkin

2021-01-11 Paper

DOI: 10.1039/D0CP06171A

Inside front cover

2021-01-21 Cover

DOI: 10.1039/D1CP90007B

Acidity constant and DFT-based modelling of pH-responsive alendronate loading and releasing on propylamine-modified silica surface

Khalid Ahmed, Shaukatali Najikhan Inamdar, Nashiour Rohman, Adam A. Skelton

2020-12-14 Paper

DOI: 10.1039/D0CP04498A

TD-DFT simulations of K-edge resonant inelastic X-ray scattering within the restricted subspace approximation

Vinícius Vaz da Cruz, Sebastian Eckert

2020-10-19 Paper

DOI: 10.1039/D0CP04726K

您可能还喜欢

化合物问答

什么是2-Bromo-1-(pyrimidin-2-yl)ethanone hydrobromide(CAS号:1588441-02-4)?

2-Bromo-1-(pyrimidin-2-yl)ethanone hydrobromide是一种有机化合物,分子式为C6H5Br2N2O2。它是一种溴代化合...

1588441-02-42-Bromo-1-(2-pyrimid...
化合物问答

在合成中是否有1-正-丁基-3-甲基咪唑鎓三氟甲烷磺酸盐(CAS号:174899-66-2)的替代品?

在合成中,可以考虑使用1-正-丁基-3-甲基咪唑鎓溴酸盐或1-正-丁基-3-甲基咪唑鎓氯酸盐作为替代品。这些化合物在性能上与1-正-丁基-3-甲基咪唑鎓三氟甲烷...

174899-66-21-Butyl-3-methyl-1H-...
化合物问答

2-methyl-5-thiophen-2-ylfuran-3-carboxylic acid(CAS号:651005-90-2)的市场或研究趋势如何?

目前,2-methyl-5-thiophen-2-ylfuran-3-carboxylic acid的研究主要集中在药物化学和新型材料领域。随着生物医药和有机合...

651005-90-22-Methyl-5-(thien-2-...
化合物问答

格列吡嗪杂质H(CAS号:13554-93-3)的主要用途是什么?

格列吡嗪杂质H主要作为药物中间体或副产物存在,并无特定的工业应用。在药物生产中,它可能需要被处理掉以保证最终药物的质量。

13554-93-3Ethyl (2-(4-((cycloh...
化合物问答

如何储存(9ci)-4-甲氧基-1H-苯并咪唑-2-乙腈(CAS号:317817-41-7)?

(9ci)-4-甲氧基-1H-苯并咪唑-2-乙腈应储存在阴凉、干燥、通风良好的地方,避免阳光直射。使用密封的玻璃或塑料容器储存,并确保容器的密封性良好,以防止挥...

317817-41-7(4-Methoxy-1H-benzim...
化合物问答

4,5,9,10-四氢苯芘(CAS号:781-17-9)应用于哪些行业?

4,5,9,10-四氢苯芘在医药行业用于作为某些药物的中间体,在聚合物行业用作添加剂提升材料的热稳定性,在传感器领域作为传感器的敏感材料,在半导体行业中用作掺杂...

781-17-94,5,9,10-Tetrahydrop...
化合物问答

处理叶酸-D4(CAS号:171777-72-3)时应注意哪些实验室安全事项?

处理叶酸-D4时应佩戴个人防护装备(PPE),如手套和实验服。操作应在通风橱内进行,以避免吸入蒸汽或粉尘。如果不慎泄露,应立即用大量清水冲洗,并通知安全人员。参...

171777-72-3Folic Acid-d4
化合物问答

如何处理含有6-溴-2-(三氟乙酰基)-1,2,3,4-四氢异喹啉(CAS号:252331-63-8)的废料?

含有该化合物的废料应收集到专用的容器中,并进行密封以防止挥发和泄漏。在处理前,需进行危险性评估,以确定是否需要进行化学处理。最终处置需遵循当地的危险废物管理规定...

252331-63-81-(6-bromo-3,4-dihyd...
化合物问答

4,5-二氟-2-甲氧基苯甲醛(CAS号:145742-34-3)的主要用途是什么?

4,5-二氟-2-甲氧基苯甲醛主要用作有机合成中的中间体,特别是在制药和农药领域。它可以作为合成其他有机化合物的原料。

145742-34-34,5-difluoro-2-metho...
化合物问答

5-溴-6-三氟甲基吲哚(CAS号:1198475-24-9)安全吗?

5-溴-6-三氟甲基吲哚作为一种化学试剂,具有一定的毒性,需要在通风橱中操作,并采取适当的安全措施以避免吸入、皮肤接触和眼睛刺激。应避免与皮肤和眼睛直接接触,并...

1198475-24-95-bromo-6-(trifluoro...

来源期刊

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
自引率: 10.3%
年发文量: 3036

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.

推荐供应商

免责声明
本页面提供的学术期刊信息仅供参考和研究使用。我们与任何期刊出版商均无关联,也不处理投稿事宜。如有投稿相关咨询,请直接联系相关期刊出版商。
如发现页面信息有误,请发送邮件至 support@chemtradehub.com 联系我们。我们将及时核实并处理您的问题。