Surface spectroscopic characterization of Cu/Al2O3 catalysts

Strohmeier, Brian R.; Levden, Donald E.; Field, R. S.; Hercules, David M.

doi:10.1016/0021-9517(85)90216-7

Cited by 453 publications

(138 citation statements)

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“…No peaks assigned to palladium-or copper-containing phases were detected, which suggests the presence of highly dispersed metallic phases; this was also confirmed by EDAX and EXAFS examination Pintar et al, 1998a). A detailed comparison of X-ray diffractograms of the alumina support and synthesized solids shows that the catalyst preparation procedure mainly influences the peak position at 2 0 close to 40" (Figure lb), which can be attributed to the preferred diffusion of Cu and Pd atoms into the -pAl,O, lattice (Strohmeier et al, 1985;Strukul et al, 1996).…”

Section: Catalyst Preparationmentioning

confidence: 97%

Catalytic liquid‐phase nitrite reduction: Kinetics and catalyst deactivation

1998

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Section: Catalyst Preparationmentioning

confidence: 97%

Catalytic liquid‐phase nitrite reduction: Kinetics and catalyst deactivation

1998

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“…The binding energies (BE) of Cu 2p 3/2 and 2p 1/2 were around 932.3 and 953.2 eV, respectively, which were very close to that of Cu 0 . Note that the binding energies of metallic Cu are around 932.6 and 953.8 eV (Moretti et al 1989;Strohmeier et al 1985). For the Ni element, the obtained binding energies were around 852.8 and 869.9 eV, demonstrating the presence of Ni 2p 3/2 and 2p 1/2 , respectively.…”

Section: Xps Analysismentioning

confidence: 77%

Efficient Conversion of Maltose into Sorbitol over Magnetic Catalyst in Extremely Low Acid

Zhang

et al. 2013

BioResources

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Ni/Cu/Al/Fe hydrotalcite precursor was synthesized by a co-precipitation method. The activity of the reduced precursor for one-step conversion of maltose into sorbitol in the presence of H 2 and extremely low phosphoric acid was investigated. XRD and XPS tests provided the essential properties of the precursor and prepared magnetic catalyst. Effects of various processing parameters towards the reaction performance were studied in detail. A desired sorbitol yield of 93.1% was attained at 458 K for 3 h with a catalyst dosage of 20%. A catalyst recycling experiment demonstrated that Ni 4.63 Cu 1 Al 1.82 Fe 0.79 was a better catalyst and could be reused three or four times. The specific reasons for catalyst deactivation were considered in depth.

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“…As is the case with electron spectroscopies of complex systems, absolute assessments of spectra are generally complicated, but certain relationships bear mentioning. No peak associated with the characteristic CuO shakeup satellite [36,37] was observed in any of the spectra from the alloys, although that region is not displayed in the figure. The shifting of the O1s spectra is seen on all treatments and has been attributed to hydration effects [14,[38][39][40][41][42], but unfortunately hydrogen is undetectable with XPS.…”

Section: Resultsmentioning

confidence: 94%

3D Woven Composites for New and Innovative Impact and Penetration Resistant Systems

Yen¹,

Caiazzo²

2001

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Subject Terms Report Classification unclassified Classification of this page unclassified Classification of Abstract unclassified Limitation of Abstract UU Number of Pages 426i REPORT DOCUMENTATION PAGE Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503 Final, 6/29/1996 -3 The primary objective of this research project was to provide an alternative corrosion protection through means of processes more environmentally benign than conventional methodologies. Hexavalent chromium (Cr+6) has historically been acknowledged to exhibit the technological forefront in corrosion protection of aluminum alloys. The Systems Approach Interface Engineering (SAIE) concept, adopted in this project, emphasizes the fact that the corrosion protection of a metal depends on the overall corrosion protective behavior of an entire systems, including the bulk characteristics of the coatings(s) and interfacial factors. The primary methodologies used were plasma processing. The technology showed superior corrosion resistant results to traditional aircraft coating systems. This technology is applicable to aircraft piece parts. • Milestones/Accomplishments -"Barrier-Adhesion" principle for damaged surface-and pitting-corrosion protections was established. -Equally good corrosion protection was obtained with E-coat and water-born spray primers without corrosion inhibitor, which out performed control with CC coating and a solvent borne chromated primer. -A hybrid process of IVD and cathodic plasma polymerization showed practical feasibility. AGENCY USE ONLY (Leave blank) 2. REPORT DATE MARCH 2001 REPORT TYPE AND DATES COVERED• Approach Executive SummaryCorrosion on a coated aluminum alloy can be viewed as occurring based on the following two important modes of corrosion. 1). Corrosion that occurs at and in the vicinity of the damaged, or scribed, coating, which could be termed "damaged surface corrosion". 2). Corrosion that occurs under the undamaged coating, which often appears as many small pits. This corrosion can be referenced under the general category of "pitting corrosion".Examining over several thousands of corrosion test specimens, which were subjected to SO 2 salt spray and Prohesion salt spray tests through the course of this project, it became quite clear that the corrosion damage, which can be expressed by the width of corrosion along the scribed line or by the percent of corroded area...

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Surface spectroscopic characterization of Cu/Al2O3 catalysts

Cited by 453 publications

References 31 publications

Catalytic liquid‐phase nitrite reduction: Kinetics and catalyst deactivation

Catalytic liquid‐phase nitrite reduction: Kinetics and catalyst deactivation

Efficient Conversion of Maltose into Sorbitol over Magnetic Catalyst in Extremely Low Acid

3D Woven Composites for New and Innovative Impact and Penetration Resistant Systems

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