Breaking Electrochemical Scaling Laws in Atomically Engineered van der Waals Stack Multisite Edge Catalysts
Journal
Nano Letters
Journal Volume
25
Journal Issue
31
Start Page
12059
End Page
12066
ISSN
1530-6984
1530-6992
Date Issued
2025-07-28
Author(s)
Chen, Ding-Rui
Muthu, Jeyavelan
Chang, Jui-Teng
Chen, Yu-Xiang
Khurshid, Farheen
Chin, Hao-Ting
Kong, Jing
Hsieh, Ya-Ping
Abstract
Electrocatalysis is key to sustainable energy conversion and storage, but its efficiency is limited by scaling laws between reactant adsorption and desorption. Multisite catalysts promises to overcome these limits, but challenges in fabrication and characterization hinder its validation. We present a platform to study and optimize multisite electrocatalysis. Leveraging van der Waals stacked 2D materials, we create catalytic edge assemblies with precise activity variations, enabling atomically engineered site separation and interaction. This approach enables the identification of multisite catalysts that enhance the hydrogen evolution reaction (HER) beyond single-site Sabatier scaling. Altering atomic-scale site separations reverts the system to single-site mechanisms, highlighting the importance of intermediate transport. Direct evidence of intermediate exchange is provided by electrostatic control of the sites, supported by ab initio simulations. We further engineer bifunctional catalysts for the oxygen evolution reaction (OER) and HER, achieving superior neutral water splitting. These findings enable the catalytic cascade design and complex electrochemical synthesis.
Subjects
2D materials
Hydrogen evolution reaction (HER)
Multisite catalysts
Overall water splitting
van der Waals stack edges
SDGs
Publisher
American Chemical Society (ACS)
Type
journal article