Performance of homogeneous catalysts viewed in dynamics

Area of Science:

• Catalysis
• Chemical Kinetics
• Materials Science

Background:

• Current catalyst screening often relies solely on reaction yields, overlooking complex system dynamics.
• This simplified approach fails to account for intrinsic catalyst reactivities and transient behaviors.

Purpose of the Study:

• To examine the transient behavior of catalysts during activation, deactivation, and turnover.
• To illustrate how catalyst speciation and reaction environments influence kinetics.
• To propose a more comprehensive depiction of catalytic performance beyond reaction yield.

Main Methods:

• Analysis of catalyst behavior in hydrogenation catalysis as a representative example.
• Investigation of real-time catalyst speciation under various reaction conditions.
• Identification and discussion of catalytically relevant descriptors.

Main Results:

• Catalyst performance is a complex, time-dependent metric influenced by multiple factors.
• Transient processes like activation and deactivation critically affect overall kinetics.
• Real-time catalyst speciation is determined by process dynamics and the reaction environment.

Conclusions:

• Reaction yield alone is insufficient for effective catalyst assessment.
• A multi-descriptor approach is necessary for a comprehensive understanding of catalytic performance.
• The findings are applicable to various catalytic transformations beyond hydrogenation.