Metadata Reference Model

cat_core

The CatCore describes the minimum information which must be reported with research data concerning the field of catalysis. This guideline should help to handle and standarise data in this versatile research field based on the FAIR principle (F-indable, A-ccessible, I-nteroperable, R-eusable). This should help to ensure that research results are supported by high quality data and to simplify quering the shared data for a future of data-driven material discovery. The guideline is based on the terminology of Voc4Cat. The inner CatCore describes the most fundamental metadata which is mandatory to describe the research on the most general level with the goal of facilitating a categorization of the research data and help researchers to make their data findable. The expanded CatCore contains the data classes 'Synthesis', 'Reaction', 'Characterization' and 'Simulation'. It is important to note that 'Synthesis' and 'Reaction' are the two data classes which are fundamental for catalysis and cannot be transferred to other fields, whereas the characterization methods and simulations are well-known in other chemistry fields.

Mandatory
catalysis research field
hybrid catalysis
other catalysis research field
Reaction type (RXNO)
active site
Recommended
Identifier
Optional
Metadata Hierarchy Chart
synthesis

The data class 'Synthesis' of the CatCore describes the minimum information which should be reported with research data concerning the field of catalyst synthesis. Based on the various catalysis research fields, this data class is kept general to allow relevant entries of the various research fields. To ensure a reasonable description of the synthesised catalyst, also parameters which need to be determined by analytical methods (such as BET or NMR) can be entered.

Mandatory
nominal composition
catalyst measured properties (e.g. BET, sieve fraction, molar ratio)
precursor
preparation method
impregnation
type of impregnation
impregnation duration
impregnation temperature
drying device
drying temperature
drying time
drying atmosphere
number of cycles
co-precipitation
precipitating agent
precipitating concentration
mixing rate
mixing time
drying device
drying temperature
drying time
drying atmosphere
number of cycles
order of addition
aging temperature
aging time
sol-gel
hydrolysis ratio
aging time
surfactant template
solvothermal
filing volume
vessel type
cooling rate
plasma-assisted
plasma type
power input
exposure time
combustion synthesis
fuel
oxidizer
fuel-to-oxidizer ratio
set temperature
post-treatment
vessel type
atomic layer deposition
pulse time
number of cycles
deposition temperature
carrier gas
spray pyrolysis
spray rate
substrate temperature
carrier gas
post-treatment
deposition-precipitation
precipitating agent
deposition temperature
deposition time
mixing rate
mixing time
mixing temperature
drying device
drying temperature
drying time
drying atmosphere
number of cycles
order of addition
filtration
purification
aging temperature
aging time
microwave-assisted
power
microwave frequency
vessel type
Sonochemical synthesis
sonication power
sonication duration
temperature
drying device
drying temperature
drying time
drying atmosphere
number of cycles
Flame spray pyrolysis
type of flame
flow rate
inlet system
flame ring
Dispersant
capillary pressure
fuel/dispersant ratio
filtration device
filter type
mechanochemical synthesis
Vessel volume
size and material
ball material
ball size
ball to powder ratio
Sublimation
Molecular synthesis
reaction vessel
mixing device
filtration device
filter type
crystallisation solvents
precipitation agent
crystallisation duration
number of cycles
drying device
drying temperature
temperature ramp
drying time
Exsolution synthesis
other preparation method
Nanocasting (hard-templating)
Soft-templating
Layer-by-layer deposition
Thermal decomposition
Bio-assisted synthesis (e.g. plant-based, enzyme-templated)
Core–shell synthesis
Supercritical fluid synthesis
Sol–emulsion synthesis
Melting
Ion exchange
Dip coating
Reverse microemulsion
Chemical Vapor Deposition (CVD)
Physical Vapor Deposition (PVD)
Electrodeposition
Solid-state synthesis
Recommended
storage conditions
Optional
solvent
solvent quantity
Sample pre-treatment
vessel type
flow rate
duration
temperature
Metadata Hierarchy Chart
characterization

The data class 'Characterization' of the CatCore describes the minimum information which should be reported with research data to describe the nature of the catalyst. Herefore, various characterization methods are listed which are highly important in the catalysis research field. To ensure a standaridisation of the data, recommendations on the meta data report are given for the specific methods.

Mandatory
equipment
characterization technique
powder X-ray diffraction
Minimum 2 theta
Maximum 2 theta
Sample spinning speed
X-ray absorption spectroscopy
element analyzed
absorption edge
monochromator
minimum energy
maximum energy
beamline source
noise of the measurement
number of cycles
infrared spectroscopy
Minimum wavenumber
Maximum wavenumber
temperature
Minimum wavenumber
Maximum wavenumber
Raman spectroscopy
Filter or grating
gas chromatography-mass spectrometry
column type
Carrier gas
Carrier gas purity
Inlet temperature
Minimum oven temperature
Maximum oven temperature
Heating ramp
Heating procedure
Acquisition mode
Solvent delay
Trace Ion Detection
Split ratio
Nuclear magnetic resonance spectroscopy
nucleus
atmosphere
Transmission electron microscopy
gun type
acceleration voltage
inductively-coupled plasma atomic emission spectroscopy
element analyzed
calibration method
matrix effect correction
scanning electron microscopy
gun type
acceleration voltage
Image resolution
field emitter
thermogravimetry
heating rate
heating procedure
X-ray photoelectron spectroscopy
Total acquisition time
Number of scans
Spot size
minimum energy
maximum energy
step size
pass energy
charge compensation
Brunnauer-Emmet-Teller
adsorbate gas
degassing temperature
measurement temperature
pore size distribution method
Elemental analysis
elements analyzed
combustion temperature
ultraviolet-visible spectroscopy
Minimum wavelength
Maximum wavelength
diffuse reflectance infrared Fourier transform spectroscopy
Adsorption gas
atmosphere
flow rate
Diluting reference
Ratio reference sample
Resolution
Background correction method
cyclic voltammetry
Minimum potential
Maximum potential
Electrolyte composition
Electrolyte concentration
Number of cycles
atmosphere
temperature
dynamic light scattering
Scattering angle
Refractive index
Dispersant
Measurement duration
electrospray ionisation mass spectrometry
Capillary temperature
Carrier gas
photoluminescence spectroscopy
Optical filter
Emission range
Slit width
Integration time
Photoluminescence lifetime measurement
Optical filter
Lifetime fitting model
Number of shots
size-exclusion chromatography
column type
Flow rate
Calibration standard
high-performance liquid chromatography mass spectrometry
column type
Gradient program
Ionization mode
Flow rate
single crystal X-ray diffraction
energy-dispersive X-ray emission spectroscopy
Primary energy
Counting time
Resolution
Calibration method
Conductivity Measurement
Electrode configuration
AC or DC mode
Sample geometry
Recommended
Optional
sample state
sample description
detector type
sample preparation
sample holder
particle size
Sample pretreatment
Metadata Hierarchy Chart
reaction

The data class 'Reaction' of the CatCore describes the minimum information which should be reported with research data concerning the reaction for which the catalyst is applied and the evaluation of the catalyst's performance.

Mandatory
catalyst quantity
reactor design type
slurry reactor
fixed bed reactor
fluidized bed reactor
gas distributor type
bed expansion height
bubble size distribution
reactant
role
quantity
operation parameters
range - feed composition
product identification method
Recommended
catalyst type
Optional
Metadata Hierarchy Chart
simulation

The data class 'Simulation' of the CatCore describes the minimum information which should be reported with research data for conduction simulations in the field of catalysis to gain theoretical insights.

Mandatory
software/package used
simulation method
Molecular Dynamics
force field used
simulation time
ensemble (e.g. NVT, NPT)
number of atoms
microkinetics
solver type
pressure
surface coverage
activation energy for each step
Monte Carlo
interaction potential used
number of steps
lattice size and type
acceptance criteria
equilibration steps
sampling interval
calculated property
Thermodynamic stability
formation energy per atom
reference elemental energies
ebergy above convex hull
phase diagram type (e.g. binary, ternary)
competing phase list
Piezoelectricity
piezoelectric tensor components
crystal symmetry
strain applied
ionic/electronic contributions
Elastic constants
elastic tensor
bulk modulus
shear modulus
Poisson's ratio
Young's modulus
Surfaces
surface energy
Miller indices
slab thickness
vacuum spacing
surface termination method
Dielectric tensors
Material composition
Energy cutoff
Convergence criteria
k-point mesh
Phonon dispersion
Material composition
Force constant calculation method
k/q-point mesh for phonons
Smearing/broadening parameter
Imaginary modes present?
Equations of state
Material composition
Fit method (Birch-Murnaghan, Vinet, etc.)
Energy cutoff
k-point mesh
Bulk modulus from fit
Pressure derivative
Residuals of fit
Aqueous stability
Material composition
pH range considered
Potential range considered
Solvation model
Ionic strength
Grain boundaries
Material composition
Grain boundary plane
Misorientation angle
Grain boundary energy
Simulation cell size
GB excess volume
GB structural units description
Charge or defect segregation data
Electronic structure
Material composition
k-point mesh
Energy cutoff
Smearing method and width
Spin-polarized?
Band path used
Fermi energy
Ferroelectrics
Material composition
Polarization direction
Spontaneous polarization magnitude
Reference paraelectric structure
Switching barrier
Coercive field
Temperature dependence
band_gap (eV)
Structure/model
k-point mesh
Smearing/broadening
Direct/indirect
Experimental reference
GW/hybrid correction used?
Excitonic correction
Recommended
Optional
Metadata Hierarchy Chart