The Relationship between the Electronic and Redox Properties of Dispersed Metal Oxides and Their Turnover Rates in Oxidative Dehydrogenation Reactions

2002 ◽  
Vol 209 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Kaidong Chen ◽  
Alexis T. Bell ◽  
Enrique Iglesia
Keyword(s):  
Metal Oxides ◽  
Oxidative Dehydrogenation ◽  
Redox Properties ◽  
Turnover Rates ◽  
Dehydrogenation Reactions ◽  
The Relationship

A Magnetically Ordered Non-Stoichiometric Zinc Ferrite for the Oxidative Dehydrogenation Reactions.

2001 ◽  
Vol 676 ◽  
Author(s):  
J. A. Toledo ◽  
N. Nava ◽  
X. C. Sun ◽  
X. Bokhimi
Keyword(s):  
Catalytic Activity ◽  
Oxidative Dehydrogenation ◽  
Spinel Structure ◽  
Zinc Ferrite ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Octahedral Sites ◽  
Tetrahedral Sites ◽  
Dehydrogenation Reactions ◽  
Hydrothermal Reduction

ABSTRACTZnFe2O4 nanoparticles were prepared by hydrothermal reduction approach. A considerable amount of α-Fe2O3 was segregated in the as-synthesized sample, which diffused into the tetrahedral and octahedral sites of the ZnFe2O4 spinel structure with increasing the annealing temperature. The introduction of Fe3+ into the tetrahedral positions was observed by Mössbauer spectra. Magnetization measurements showed an unusual ferrimagnetic behavior of the ZnFe2O4 phase, even at room temperature, confirming the introduction of Fe3+ into the tetrahedral sites of the spinel structure. Catalytic activity measured in the oxidative dehydrogenation of 1-butene reaction increased with increasing annealing temperature, indicating that those interactions of Fe3+ in tetrahedral and octahedral positions also promotes the activity and selectivity to butadiene formation.

scholarly journals Boron-doped graphene as a metal-free catalyst for gas-phase oxidation of benzyl alcohol to benzaldehyde

RSC Advances ◽  
2018 ◽  
Vol 8 (20) ◽  
pp. 11222-11229 ◽  
Author(s):  
Wenjun Cheng ◽  
Xueting Liu ◽  
Na Li ◽  
Jiatong Han ◽  
Shuangming Li ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Gas Phase ◽  
Oxidative Dehydrogenation ◽  
Metal Free ◽  
Boron Doped ◽  
Oxidation Of Benzyl Alcohol ◽  
Phase Oxidation ◽  
Doped Graphene ◽  
Gas Phase Oxidation ◽  
Dehydrogenation Reactions

Boron doped graphene for the oxidative dehydrogenation reactions.

Oxidative dehydrogenation of ethane and subsequent CO2 activation on Ce-incorporated FeTiOx metal oxides

2022 ◽  
pp. 134621
Author(s):  
Min Hye Jeong ◽  
Dong Hyung Lee ◽  
Ji Won Moon ◽  
Jian Sun ◽  
Jae Soon Choi ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Oxidative Dehydrogenation ◽  
Co2 Activation ◽  
Oxidative Dehydrogenation Of Ethane

scholarly journals Insights into the relationship between the catalytic oxidation performances of Ce-Pr mixed oxides and their semiconductive and redox properties

2019 ◽  
Vol 578 ◽  
pp. 30-39 ◽  
Author(s):  
Ionel Popescu ◽  
Juan Carlos Martínez-Munuera ◽  
Avelina García-García ◽  
Ioan-Cezar Marcu
Keyword(s):  
Catalytic Oxidation ◽  
Mixed Oxides ◽  
Redox Properties ◽  
The Relationship

Critical Factors for Field Staff: The Relationship Between Burnout, Coping, and Vocational Purpose

2019 ◽  
Vol 42 (4) ◽  
pp. 398-416
Author(s):  
Alexandra Z. Kolaski ◽  
Jennifer M. Taylor
Keyword(s):  
Behavioral Health Care ◽  
Security Assessment ◽  
Turnover Rates ◽  
Field Staff ◽  
Workplace Satisfaction ◽  
Key Characteristics ◽  
Outdoor Behavioral Health Care ◽  
Confirmatory Factor ◽  
The Impact ◽  
The Relationship

Background: Outdoor Behavioral Health Care (OBH) programs rely on field staff (FS) for the daily management of program activities, client safety and security, assessment information, and therapeutic intervention. Purpose: Given research that indicates turnover rates among FS are high, the present study was designed to evaluate components of resilience and burnout among FS that may help OBH programs retain FS. Methodology/Approach: Confirmatory factor analysis was used to empirically examine the impact of McEwan’s Workplace Resilience Model factors on FS resilience. Findings/Conclusions: A well-fitting model was developed to explain relationships between burnout, coping skills, and purpose among FS. Important links between vocational purpose, coping, and burnout were found. Implications: This article concludes by discussing implications and recommendations for OBH programs, in support of FS retention and workplace satisfaction, including the importance of creating workplace social and physical health support systems and key characteristics of resilient FS.

Experimental reliability of the doubly labeled water technique

1994 ◽  
Vol 266 (3) ◽  
pp. E510-E515 ◽  
Author(s):  
M. I. Goran ◽  
E. T. Poehlman ◽  
E. Danforth
Keyword(s):  
Co2 Production ◽  
Eating Patterns ◽  
Doubly Labeled Water ◽  
Turnover Rates ◽  
Analytical Uncertainty ◽  
Healthy Men ◽  
Experimental Variation ◽  
Clinical Research Center ◽  
The Mean ◽  
The Relationship

The experimental reliability of measuring CO2 production rates (rCO2) with the doubly labeled water (DLW) technique was assessed in five young healthy men (23 (DLW) technique was assessed in five young healthy men (23 +/- 4 yr; 66.1 +/- 4.6 kg). To minimize the confounding effects of fluctuations in physical activity and eating patterns on variation in energy expenditure, the subjects lived under sedentary living conditions by confinement to their own room at a Clinical Research Center and were maintained on a fixed and known level of energy intake. rCO2 was determined in duplicate over two identical 9-day study periods after separate loading doses of deuterium and oxygen-18. Turnover rates were determined from multipoint sampling to reduce error from analytical uncertainty. Dilution spaces were determined by both the intercept and plateau methods. The average experimental variation for rCO2 estimates was approximately +/- 8.5% and was not significantly different among three published calculation models that differ in their assumptions regarding the relationship between the dilution spaces of deuterium and oxygen-18. The experimental reliability of +/- 8.5% exceeds theoretical values generated from calculations based on propagation of error from analytical uncertainty. Between subjects, the experimental variation ranged from 1 to 21%, and the half-width of the 95% confidence interval for the precision of rCO2 estimates was high (+/- 12 mol/day) relative to the mean reported value of approximately 16 mol/day.(ABSTRACT TRUNCATED AT 250 WORDS)

scholarly journals Oxygen-Functionalized Few-Layer Graphene Sheets as Active Catalysts for Oxidative Dehydrogenation Reactions

ChemSusChem ◽  
2013 ◽  
Vol 6 (5) ◽  
pp. 732-732
Author(s):  
Viviane Schwartz ◽  
Wujun Fu ◽  
Yu-Tung Tsai ◽  
Harry M. Meyer ◽  
Adam J. Rondinone ◽  
...  
Keyword(s):  
Oxidative Dehydrogenation ◽  
Graphene Sheets ◽  
Layer Graphene ◽  
Dehydrogenation Reactions ◽  
Few Layer Graphene

A study of the effect of cesium loading on the phase transformation of iron in iron phosphate over the oxidative dehydrogenation reactions

2014 ◽  
Vol 231 (1-3) ◽  
pp. 123-129 ◽  
Author(s):  
Faiza B. Khan ◽  
Venkata D. B. C. Dasireddy ◽  
K. Bharuth-Ram ◽  
H. Masenda ◽  
H. B. Friedrich
Keyword(s):  
Phase Transformation ◽  
Oxidative Dehydrogenation ◽  
Iron Phosphate ◽  
Dehydrogenation Reactions
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