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Related Experiment Video

Updated: Feb 6, 2026

Composite Scaffolds of Interfacial Polyelectrolyte Fibers for Temporally Controlled Release of Biomolecules

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Published on: August 19, 2015

Steering Ethylene Electrosynthesis by Controlling Interfacial Water Orientation.

Xinning Song^1,2, Libing Zhang^1,2, Xiaodong Ma^1,2

¹Beijing National Laboratory for Molecular Sciences, CAS Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Center for Carbon Neutral Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.

Angewandte Chemie (International Ed. in English)

|February 5, 2026

Summary

Researchers engineered catalyst surfaces to control water molecule orientation, significantly boosting ethylene production from CO2 electroreduction. This breakthrough offers a new strategy for designing efficient catalysts for chemical synthesis.

Keywords:

carbon dioxide electrocatalysis ethylene synthesis interfacial water orientation

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Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy

Published on: May 27, 2018

Area of Science:

Catalysis
Surface Chemistry
Electrocatalysis

Background:

Controlling reaction pathways through solvent polarization is challenging due to complex interfacial kinetics.
Understanding interfacial water dynamics is crucial for regulating catalytic reactions.

Purpose of the Study:

To establish interfacial water orientation as a method to control reaction pathway bifurcation in electrocatalysis.
To demonstrate the role of water polarization in electrocatalytic CO2 reduction.

Main Methods:

Utilized an adaptive subsurface tuning (AST) strategy to engineer Ga-doped Cu catalysts.
Investigated interfacial water orientation and its coupling with H2O polarization.
Employed electrocatalytic CO2 reduction as a model system.

Main Results:

Achieved precise H-down water alignment on Ga/Cu catalysts, regulating proton transfer and intermediate stabilization.
The optimized Ga/Cu catalyst yielded a 68.8% Faradaic efficiency for ethylene at 800 mA cm-2, significantly outperforming ethanol production.
Attained high current density, competitive with top-performing catalysts for ethylene production.

Conclusions:

Interfacial water orientation, specifically H-down alignment, enhances *H availability and directs selective C-O bond cleavage for high ethylene selectivity.
Demonstrated that interfacial water orientation is a key factor in steering C-C coupling selectivity in electrocatalysis.
Provided a rational design principle for developing efficient electroreduction systems.