On the catalytic properties of mixed oxides for the electrochemical reduction of oxygen

The evolution of microstructures of 10- to 100-Å diameter particles of Rh and Pt on SiO2 and Al2O3 following treatment in reducing, oxidizing, and reacting conditions have been characterized by TEM. We are able to transfer particles repeatedly between microscope and a reactor furnace so that the structural evolution of single particles can be examined following treatments in gases at atmospheric pressure. We are especially interested in the role of Ce additives on noble metals such as Pt and Rh. These systems are crucial in the automotive catalytic converter, and rare earths can significantly modify catalytic properties in many reactions. In particular, we are concerned with the oxidation state of Ce and its role in formation of mixed oxides with metals or with the support. For this we employ EELS in TEM, a technique uniquely suited to detect chemical shifts with ∼30Å resolution.

Download Full-text

Electrochemical reduction of oxygen catalyzed by Pseudomonas aeruginosa

Electrochimica Acta ◽

10.1016/j.electacta.2010.03.085 ◽

2010 ◽

Vol 55 (17) ◽

pp. 4902-4908 ◽

Cited By ~ 46

Author(s):

Amandine Cournet ◽

Mathieu Bergé ◽

Christine Roques ◽

Alain Bergel ◽

Marie-Line Délia

Keyword(s):

Pseudomonas Aeruginosa ◽

Electrochemical Reduction ◽

Electrochemical Reduction Of Oxygen

Download Full-text

Comparison of structural and catalytic properties of monometallic Mo and V oxides and M1 phase mixed oxides for oxidative dehydrogenation

Catalysis Today ◽

10.1016/j.cattod.2020.04.046 ◽

2020 ◽

Author(s):

Leelavathi Annamalai ◽

Sopuruchukwu Ezenwa ◽

Yanliu Dang ◽

Haiyan Tan ◽

Steven L. Suib ◽

...

Keyword(s):

Oxidative Dehydrogenation ◽

Mixed Oxides ◽

Catalytic Properties ◽

M1 Phase

Download Full-text

Electrochemical Reduction of Oxygen at Pyrolyzed Iron and Cobalt N4-Chelates on Carbon Black Supports

Chemical Engineering & Technology ◽

10.1002/1521-4125(200009)23:9<803::aid-ceat803>3.0.co;2-t ◽

2000 ◽

Vol 23 (9) ◽

pp. 803-807 ◽

Cited By ~ 31

Author(s):

H. Kalvelage ◽

A. Mecklenburg ◽

U. Kunz ◽

U. Hoffmann

Keyword(s):

Carbon Black ◽

Electrochemical Reduction ◽

Electrochemical Reduction Of Oxygen

Download Full-text

Electrochemical Reduction of Oxygen on Nano-Structured M (M = Fe, Co, Ce, W)Py/C in Alkaline Electrolyte

ECS Transactions ◽

10.1149/1.3701972 ◽

2012 ◽

Vol 45 (2) ◽

pp. 111-117 ◽

Cited By ~ 1

Author(s):

J. Qiao ◽

L. Ding ◽

L. Xu ◽

X. Dai ◽

Y. Liu

Keyword(s):

Electrochemical Reduction ◽

Alkaline Electrolyte ◽

Electrochemical Reduction Of Oxygen

Download Full-text

Electron Donating, Acid-Base and Catalytic Properties of Perovskite-Type Mixed Oxides of Rare Earths

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19950977 ◽

1995 ◽

Vol 60 (6) ◽

pp. 977-982

Author(s):

S. Sugunan ◽

V. Meera

Keyword(s):

Catalytic Activity ◽

Electron Donor ◽

Rare Earths ◽

Electron Affinity ◽

Mixed Oxides ◽

Catalytic Properties ◽

Surface Acidity ◽

Electron Acceptors ◽

Acid Base ◽

Perovskite Type

The electron donor properties of perovskite-type mixed oxides (LaFeO3, PrFeO3, SmFeO3, LaCoO3, PrCoO3, SmCoO3, LaNiO3, PrNiO3 and SmNiO3) were studied based on the adsorption of electron acceptors exhibiting different electron affinity viz. 7,7,8,8-tetracyanoquinodimethane, 2,3,5,6-tetrachloro-1,4-benzoquinone, p-dinitrobenzene, and m-dinitrobenzene. The surface acidity/basicity of the oxides was determined using a set of Hammett indicators. The data were correlated with the catalytic activity of the oxides for the reduction of cyclohexanone with 2-propanol.

Download Full-text