Bromine-mediated electrochemical propane dehydrogenation by self-assembled ionic liquid-SnO(2) hollow spheres
Summary
Conventional thermal propane dehydrogenation (PDH) faces several notable drawbacks, including high energy requirements, coking-induced catalyst deactivation, and the need for product separation. An electrocatalytic approach, using self-assembled ionic liquid (IL)-tin dioxide (SnO2) hollow spheres as the electrocatalyst, enables efficient PDH at ambient temperature. In this process, bromopropane formed in the anolyte from propane reacts with hydroxyl anions from the cathode to yield propene
Content
# Bromine-mediated electrochemical propane dehydrogenation by self-assembled ionic liquid-SnO(2) hollow spheres
*Published: 2026 Apr 2*
Conventional thermal propane dehydrogenation (PDH) faces several notable
drawbacks, including high energy requirements, coking-induced catalyst
deactivation, and the need for product separation. An electrocatalytic approach,
using self-assembled ionic liquid (IL)-tin dioxide (SnO2) hollow spheres as the
electrocatalyst, enables efficient PDH at ambient temperature. In this process,
bromopropane formed in the anolyte from propane reacts with hydroxyl anions from
the cathode to yield propene. The propene selectivity exceeds 98%, and the
continuous production of high-purity (>99%) propene gas from the anolyte
eliminates the need for downstream separation. The IL-SnO2 catalyst maintains
its activity and selectivity for more than 6000 hours, with a small voltage
increase rate of 3.16 microvolts per hour. Mechanistic studies suggest that the
IL layer enhances propane adsorption and facilitates the carbon-hydrogen bond
activation step on adjacent Sn sites. After reaction, the IL layer promotes
propene desorption and suppresses deep dehydrogenation.
DOI: 10.1126/science.aed2309