Molecular Electrocatalysts for the Hydrogen Evolution Reaction: Input from Quantum Chemistry

Area of Science:

• Computational Chemistry
• Materials Science
• Renewable Energy

Background:

• Hydrogen is a promising carbon-free fuel, necessitating efficient production methods.
• Molecular electrocatalysts, particularly those based on earth-abundant metals, are crucial for sustainable hydrogen evolution reaction (HER).
• Over two decades of research have focused on designing effective homogeneous HER catalysts.

Purpose of the Study:

• To review significant theoretical mechanistic studies of biomimetic and bioinspired homogeneous HER catalysts.
• To discuss computational approaches for studying catalytic performance and free energy landscapes.
• To identify structural and electronic parameters governing reactivity for efficient hydrogen production.

Main Methods:

• Theoretical mechanistic studies of homogeneous electrocatalysts.
• Analysis of free energy landscapes for catalytic pathways.
• Computational methods for estimating relevant observables in HER.

Main Results:

• Numerical approaches are powerful tools for understanding electrocatalyst performance.
• Key structural and electronic factors influencing HER efficiency have been identified.
• Biomimetic and bioinspired homogeneous catalysts show significant potential for hydrogen production.

Conclusions:

• Theoretical studies provide crucial insights into the design of efficient molecular electrocatalysts for HER.
• Understanding structure-activity relationships is vital for optimizing catalyst design.
• Continued research into these catalysts is essential for advancing renewable energy technologies.