Adsorption and Collective Paramagnetism - 1st Edition - ISBN: 9781483231051, 9781483270517

Adsorption and Collective Paramagnetism

1st Edition

Authors: Pierce W. Selwood
eBook ISBN: 9781483270517
Imprint: Academic Press
Published Date: 1st January 1962
Page Count: 200
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Description

Adsorption and Collective Paramagnetism describes a novel method for studying chemisorption. The method is based on the change in the number of unpaired electrons in the adsorbent as chemisorption occurs. The method is applicable to almost all adsorbates, but it is restricted to ferromagnetic adsorbents such as nickel, which may be obtained in the form of very small particles, that is to say, to ferromagnetic adsorbents with a high specific surface. While almost all the data used illustratively have been published elsewhere this is the first complete review of the subject. The book is addressed primarily to readers interested in heterogeneous catalysis and related areas of surface chemistry, surface physics, and physical metallurgy. For that reason there are included a number of definitions, and an elementary introduction to magnetism. But it is hoped that specialists in magnetism and solid state physics may also find here something of value. For that reason there is included an introduction to adsorption phenomena. If one group finds the detailed magnetic descriptions and calculations to be tedious it is to be hoped that the adsorption work will be found comprehensible, and vice versa.

Table of Contents


Preface

Chapter I Chemistry of Solid-Vapor Interfaces

1. Introduction

2. The Nature of Chemisorption

3. Experimental Methods in Surface Chemistry

4. Introduction to the Magnetic Method

References

Chapter II Introduction to Magnetism

1. Magnetic Phenomena

2. Atomic Basis of Diamagnetism and Paramagnetism

3. Antiferromagnetism

4. Ferromagnetism

5. Ferrimagnetism

References

Chapter III Very Small Ferromagnetic Particles

1. Introduction

2. Collective Paramagnetism

3. Anisotropy Effects

4. Some Experimental Evidence for Collective Paramagnetism

5. Particle Size Determination

References

Chapter IV The Measurement of Saturation Magnetization

1. The Experimental Problem

2. The Method of Weiss and Forrer

3. Correction for Demagnetizing Field

4. Correction for the Magnetic Image Effect

5. Calibration

6. General Procedure

References

Chapter V Saturation Data

1. Some Experimental Results

2. Discussion of the Experiment

3. The Significance of ε

References

Chapter VI The Measurement of Magnetization at Low H/T

1. The ac Permeameter

2. The Theory of Low Saturation Measurements

3. Thermal Transients and the Heat of Adsorption

References

Chapter VII Magnetization-Volume Isotherms for Hydrogen

1. Experimental Data for Hydrogen on Nickel

2. Conclusions Concerning the Bonding of Hydrogen on Nickel

3. The "Slow" Sorption of Hydrogen on Nickel

4. The Effect of Deviations from Collective Paramagnetism

5. Hydrogen on Cobalt

References

Chapter VIII Hydrogen Sulfide, Cyclohexane, Cyclohexene, and Benzene

1. Theory of the Method for Determining Bond Number

2. Hydrogen Sulfide and Dimethyl Sulfide

3. Cyclohexane

4. Cyclohexene

5. Benzene

6. The Interaction of Benzene and Hydrogen on Nickel

References

Chapter IX Ethane, Ethylene, and Acetylene

1. Ethane

2. The Associative Adsorption of Ethylene

3. Self-Hydrogenation, Dissociative Adsorption, and Carbiding

4. Remarks on the Hydrogenation of Ethylene

5. Acetylene

References

Chapter X Carbon Dioxide, Carbon Monoxide, Oxygen, and Nitrogen

1. Carbon Dioxide

2. Carbon Monoxide

3. Oxygen

4. Nitrogen, Argon, and Krypton

References

Symbols Used More Than Once

Author Index

Subject Index

Details

No. of pages:
200
Language:
English
Copyright:
© Academic Press 1962
Published:
Imprint:
Academic Press
eBook ISBN:
9781483270517

About the Author

Pierce W. Selwood