Spatial-coupled Ampere-level Electrochemical Propylene Epoxidation over RuO/Ti Hollow-fiber Penetration Electrodes.

The electrochemical propylene epoxidation reaction (PER) provides a promising route for ecofriendly propylene oxide (PO) production, instantly generating active halogen/oxygen species to alleviate chloride contamination inherent in traditional PER. However, the complex processes and unsatisfactory PO yield for current electrochemical PER falls short of meeting industrial application requirements. Herein, a spatial-coupling strategy over RuO/Ti hollow-fiber penetration electrode (HPE) is adopted to facilitate efficient PO production, significantly improving PER performance to ampere level (achieving over 80 % PO faradaic efficiency and a maximum PO current density of 859 mA cm).

Ampere-level CO electroreduction with single-pass conversion exceeding 85% in acid over silver penetration electrodes.

Synthesis of valuable chemicals from CO electroreduction in acidic media is highly desirable to overcome carbonation. However, suppressing the hydrogen evolution reaction in such proton-rich environments remains a considerable challenge. The current study demonstrates the use of a hollow fiber silver penetration electrode with hierarchical micro/nanostructures to enable CO reduction to CO in strong acids via balanced coordination of CO and K/H supplies.

Tensile-Strained Cu Penetration Electrode Boosts Asymmetric C-C Coupling for Ampere-Level CO-to-C Reduction in Acid.

The synthesis of multicarbon (C) products remains a substantial challenge in sustainable CO electroreduction owing to the need for sufficient current density and faradaic efficiency alongside carbon efficiency. Herein, we demonstrate ampere-level high-efficiency CO electroreduction to C products in both neutral and strongly acidic (pH=1) electrolytes using a hierarchical Cu hollow-fiber penetration electrode (HPE). High concentration of K could concurrently suppress hydrogen evolution reaction and facilitate C-C coupling, thereby promoting C production in strong acid.

Electrochemical Epoxidation of Propylene to Propylene Oxide via Halogen-Mediated Systems.

As one of the most important derivatives of propylene, the production of propylene oxide (PO) is severely restricted. The traditional chlorohydrin process is being eliminated due to environmental concerns, while processes such as Halcon and hydrogen peroxide epoxidation are limited by cost and efficiency, making it difficult to meet market demand. Therefore, achieving PO production through clean and efficient technologies has received extensive attention, and halogen-mediated electrochemical epoxidation of alkene is considered to be a desirable technology for the production of alkylene oxide.

Highly Efficient CO Reduction at Steady 2 A cm by Surface Reconstruction of Silver Penetration Electrode.

Electroreduction of CO to CO is a promising route for greenhouse gas resource utilization, but it still suffers from impractical current density and poor durability. Here, a nanosheet shell (NS) vertically standing on the Ag hollow fiber (NS@Ag HF) surface formed by electrochemical surface reconstruction is reported. As-prepared NS@Ag HF as a gas penetration electrode exhibited a high CO faradaic efficiency of 97% at an ultra-high current density of 2.

Chloride Ion Adsorption Enables Ampere-Level CO Electroreduction over Silver Hollow Fiber.

Electrochemical conversion of CO into valuable feedstocks is a promising strategy for carbon neutrality. However, it remains a challenge to possess a large current density, a high faradaic efficiency and excellent stability for practical applications of CO utilization. Herein, we report a facile tactic that enables exceedingly efficient CO electroreduction to CO by virtue of low-coordination chloride ion (Cl ) adsorption on a silver hollow fiber (Ag HF) electrode.

Hierarchical micro/nanostructured silver hollow fiber boosts electroreduction of carbon dioxide.

Efficient conversion of CO to commodity chemicals by sustainable way is of great significance for achieving carbon neutrality. Although considerable progress has been made in CO utilization, highly efficient CO conversion with high space velocity under mild conditions remains a challenge. Here, we report a hierarchical micro/nanostructured silver hollow fiber electrode that reduces CO to CO with a faradaic efficiency of 93% and a current density of 1.