La(OH)₃/Cu₂O Heterostructure

71.1% C₂₊ selectivity

Synergistic interfacial charge redistribution and La doping enable stable C-C coupling at high current densities while suppressing hydrogen evolution.

Mengyuan, Qin · Ding, Yue · Liu, Guobin · Wang, Hui · Qu, Zhenping

Chemical Engineering Journal 2026

Specifications

C₂₊ Faradaic efficiency

{'zh': '71.1', 'en': '71.1'} %

H₂ Faradaic efficiency

{'zh': '14.6', 'en': '14.6'} %

Stable operation duration

{'zh': '900', 'en': '900'} min

Advantages

High C₂₊ selectivity

Strong electronic interactions enhance atop-bonded CO coverage, accelerating C-C coupling and achieving a C₂₊ Faradaic efficiency of 71.1%.

Suppressed hydrogen evolution

La doping directs *H from water dissociation toward hydrogenation of C₂₊ products, resulting in a low H₂ Faradaic efficiency of 14.6%.

Stable at high current density

The La(OH)₃ protective layer stabilizes active Cu⁺ species against reduction, enabling stable operation for 900 min at 650 mA cm⁻².

Applications

• CO₂ electroreduction to multi-carbon products：Produce C₂₊ fuels such as ethylene and ethanol at high current densities
• Electrocatalytic conversion：Tailor electrocatalytic CO₂ reduction pathways via interfacial engineering
• CO₂ utilization：Convert CO₂ into value-added multi-carbon chemicals
• Carbon neutrality technologies：Drive CO₂ emission reduction and fuel generation using renewable electricity