Industrial-scale Aldehydes Electrification Via Localized Hydrogen-affinity Engineering

Area of Science:

• Electrochemistry
• Materials Science
• Catalysis

Background:

• Electrifying aldehydes offers sustainable chemical synthesis but is hindered by inefficient electrodes.
• Developing advanced electrocatalysts is crucial for practical applications in environmental remediation and resource recovery.

Purpose of the Study:

• To design and synthesize a highly efficient electrode for aldehyde electrification using a computation-guided strategy.
• To investigate the performance and mechanism of the novel electrode for converting aldehydes into high-value chemicals.

Main Methods:

• Computation-guided localized hydrogen-affinity engineering to synthesize heteroatom-decorated copper (Cu) catalysts.
• Electrochemical characterization, including Faraday efficiency and overpotential measurements.
• Operando studies and theoretical calculations to elucidate the reaction mechanism.
• Techno-economic analysis for assessing commercial viability.

Main Results:

• A Rh-decorated Cu hydrogenase (Rh1Cu-Hase) electrode achieved >99.3% Faraday efficiency for formaldehyde conversion at 500 mA cm−2 with a 283 mV overpotential.
• The membrane-free electrolyzer with Rh1Cu-Hase demonstrated stable operation for >1200 h at 1000 mA cm−2, producing high-purity potassium diformate (KDF) and hydrogen.
• Techno-economic analysis indicated a significant revenue advantage for KDF production compared to conventional methods.
• The strategy proved effective for a wide range of industrially relevant aldehydes.

Conclusions:

• Localized hydrogen-affinity engineering is a viable strategy for developing high-performance electrocatalysts.
• The Rh1Cu-Hase electrode enables efficient and stable aldehyde electrification, offering a sustainable route for chemical production.
• The paired dehydrogenation mechanism, involving Cu for adsorption and Rh for hydrogen activation, underlies the catalyst's high performance.