List of symbols and abbreviations

Latin letters

d

Distance between two atomic planes in the crystalline phase, m

D

Dispersion of metal particles, %

D0

Initial dispersion of metal particles, %

Deq

Final dispersion of metal particles, %

g

Gram

h

Hour(s)

k

Kinetic reaction rate constant for sintering, 1/s

m/z

Mass-to-charge ratio, dimensionless

n

Sintering order, dimensionless

n

Order of diffraction, dimensionless

Re

Reynolds number, dimensionless

t

Time, s

T

Temperature, °C

T50

Light-off temperature at which 50% conversion is attained, °C

THüttig

Hüttig temperature, °C

Tmelting

Melting temperature, °C

TTamman

Tamman temperature, °C

x

Integer in stoichiometric coefficient

y

Integer in stoichiometric coefficient

Greek letters

b

Heating rate, °C/min

λ

Dimensionless air-to-fuel ratio

λ

Wavelength, 1/m

θ

Diffraction angle, °

Abbreviations

A/F-ratio

Air-to-fuel ratio

BET

Brunauer-Emmett-Teller Method

BJH

Barrett Joyner Hallender Method

CC

Close-coupled catalytic converter

CDD

Catalyst Deactivation and Diagnosis (project name)

CVS

Constant Volume Sampler

DRIFT

Diffuse Reflectance Fourier Transform Infrared Spectroscopy

EDS

Energy Dispersive X-ray Spectrometer

EPA

Environmental Protection Agency

EU

European Union

EUDC

European Extra-Ultra Driving Cycle

FTIR

Fourier Transform Infrared Spectroscopy

FTP

Federal Test Procedure

GHSV

Gas Hourly Space Velocity

HK

Horvath-Kawazoe Method

ICP-AES

Inductively Coupled Plasma-Atomic Emission Spectrometry

IR

Infrared

IUPAC

International Union of Pure and Applied Chemistry

NEDC

New European Driving Cycle

PDF

Power Diffraction Database File

OBD

On-Board Diagnostics

OSC

Oxygen Storage Capacity

SEM

Scanning Electron Microscopy

TEKES

National Technology Agency of Finland (in English)

TEM

Transmission Electron Microscopy

TGA-DTA

Thermogravimetric Analysis-Differential Thermal Analysis

TPD

Temperature-programmed Desorption

TWC

Three-way catalyst, three-way catalytic converter

WGSR

Water-gas Shift Reaction

XPS

X-ray Photoelectron Spectroscopy

XRD

X-ray Diffraction

ZDP

Zinc Dialkyldithiophosphate