What is Catalyst Productivity — and why does it matter?

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Catalyst Productivity (CP) is a mass-based measure of catalytic efficiency: the grams of desired product obtained per gram of catalyst consumed. Unlike Turnover Number (TON), CP does not require knowledge of the catalyst's molecular weight, making it the metric of choice for heterogeneous catalysts (Pd/C, supported metals, zeolites, enzymes immobilised on a support) where the "molecular weight of the active site" is either undefined or irrelevant.

GoalMaximise the mass of product generated per gram of catalyst — an ideal catalyst is never consumed and would have an infinite CP.

WhyHigh CP means lower catalyst cost per kilogram of product, less metal waste, simpler downstream purification, and a smaller environmental footprint from catalyst manufacture.

HowIncrease conversion and selectivity, reduce catalyst loading, improve catalyst stability, recycle and reuse (total product across runs ÷ one batch of catalyst), and optimise conditions to prevent deactivation.

The formula

$$\text{CP} = \frac{m_{\text{product}}}{m_{\text{catalyst}}}$$

Symbol	Term	Units
$\text{CP}$	Catalyst Productivity	g g⁻¹ (dimensionless; higher is better)
$m_{\text{product}}$	Mass of isolated desired product	g
$m_{\text{catalyst}}$	Mass of catalyst used (as weighed out, including any support)	g

For heterogeneous catalysts (e.g., 5 wt% Pd/C), enter the total mass of the catalyst as weighed — support included. If you want to express CP in terms of the active metal only, multiply by the metal weight fraction (e.g., 0.05 for 5 wt% Pd/C). For homogeneous catalysts with a defined MW, consider pairing CP with Turnover Number (TON). If the catalyst is recovered and reused, add product from all runs to the numerator while the denominator stays fixed at the original catalyst mass.

Typical CP ranges by catalyst type

Catalyst type / Application	Typical CP (g g⁻¹)	Notes
Industrial heterogeneous (Haber-Bosch, Fischer-Tropsch)	> 10,000	Highly optimised, continuous, long catalyst lifetime
Supported precious metals (Pd/C, Pt/Al₂O₃) — fine chemicals	100–10,000	Depends strongly on loading, substrate, conversion
Homogeneous organometallic (Pd, Ru, Rh complexes)	10–1,000	Single batch; recycle difficult
Organocatalysis (proline, BINAP derivatives)	1–100	Often high loading; improvement area for green chemistry
Biocatalysis (free enzymes, batch)	10–10,000	Highly variable; immobilised enzymes greatly increase CP via reuse

CP vs TON — when to use each

Metric	Basis	Best for	Requires MW?
CP	Mass (g/g)	Heterogeneous catalysts, cost analysis, scale-up	No
TON	Moles (mol/mol)	Mechanistic studies, homogeneous catalysis, comparing catalyst activity	Yes
TOF (h⁻¹)	Moles per time	Kinetics, rate comparisons	Yes

Strengths and limitations

Strengths

No molecular weight required — works for any catalyst type
Directly comparable to catalyst cost and environmental burden
Easily extended to multi-run reuse: cumulative product ÷ single catalyst batch
Intuitive unit (g per g) — straightforward for industrial reporting

Limitations

Does not capture reaction rate — two catalysts with the same CP may differ greatly in TOF
Heterogeneous catalyst mass includes the support, diluting the apparent CP vs active metal only
Does not account for catalyst regeneration or partial deactivation
Sensitive to how "catalyst used" is defined — metal vs whole formulation

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Experiment details

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Experiment / reaction name

Researcher(s)

Date

Lab / institution

Reaction type

Solvent

Temperature

Catalyst / loading description

Reference / DOI

Notes

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Desired product(s)

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Enter the mass of each desired product actually isolated. If a process produces multiple valuable products, list each one — their combined mass forms the numerator of CP. Use the same mass units as for the catalyst (both in grams).

Product name	Mass isolated (g)

Σ Product mass — g numerator of CP

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Catalyst(s)

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Enter each catalyst as weighed out. For heterogeneous catalysts (e.g., Pd/C), use the total catalyst mass including support. For multi-catalyst systems, list each separately — their masses are summed for the denominator. The "% of product" column shows each catalyst mass as a percentage of the total product mass, giving a quick sense of loading.

Catalyst name	Mass used (g)	% of product mass

Σ Catalyst mass — g denominator of CP

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Results

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Catalyst Productivity

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g product / g catalyst

Total Product

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grams isolated

Total Catalyst

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grams used

CP scale — log scale (higher is better)

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< 1101001,000+

Mass breakdown: product vs catalyst

Product vs catalyst — log-scale comparison

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Detailed breakdown & interpretation

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Name	Role	Mass (g)	% of total	Visual
Enter product(s) and catalyst(s) above to see the breakdown.

Interpretation

Enter your product and catalyst masses above to generate an interpretation.

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Save & load sessions

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Sessions are stored in your browser only. No data leaves your device.

No saved sessions yet.

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Export

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Export your CP calculation as a PDF report or CSV data file. PDF opens in a new tab and uses your browser's print function. CSV downloads directly.

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Where can I read more?

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References are sorted alphabetically by first author.

P. T. Anastas and J. C. Warner, Green Chemistry: Theory and Practice, Oxford University Press, 1998. ISBN 978-0-19-850698-0. — Principle 9 (Catalysis): catalytic reagents preferred over stoichiometric; the conceptual foundation for all catalytic efficiency metrics.
B. W. Cue Jr. and J. Zhang, Green Process Synth., 2012, 1, 3–11. DOI. — Reviews green chemistry metrics including catalyst productivity in pharmaceutical manufacturing.
P. Y. Dapsens, C. Mondelli and J. Pérez-Ramírez, ACS Catal., 2012, 2, 1487–1499. DOI. — Discusses catalyst performance metrics including mass-based productivity for heterogeneous systems.
R. A. Sheldon, Green Chem., 2018, 20, 3953–3970. DOI. — Metrics for the greenness of catalysis; discusses CP and TON in the context of biocatalysis and heterogeneous catalysis.
J. L. Tucker, Org. Process Res. Dev., 2010, 14, 328–331. DOI. — Industrial perspective on catalysis metrics for pharmaceutical process development.

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Contributors

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Roles follow the CRediT taxonomy (Contributor Roles Taxonomy), adapted for educational software. Hover a contributor's name for a summary, or a column header for the definition of that role.

Contributor

This portal was built with the assistance of a large language model (Claude, Anthropic), which was used to generate and refine code, articulate and structure contributed ideas within the defined page format, and support iterative design decisions. All scientific content, conceptual frameworks, pedagogical choices, and final outputs were directed, reviewed, and verified by the contributors listed above.

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How do I cite this page?

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If you use this tool in teaching or published work, please cite the DodecaGreen portal as the source.

Reference

BibTeX

Catalyst productivity calculator.