Elemental sulfur/selenium and TMSCN act as a novel combined thio/selenocyanation source for direct oxidative C–H thio/selenocyanation of (hetero)arenes under catalyst-free and additive-free conditions.

Electroreduction of CO 2 on a polymer-modified Cu-based catalyst has shown high multi-electron reduction (> 2 e À ) selectivity, however, most of the corresponding current densities are still too small to support industrial applications. In this work, we designed a poly(ionic liquid) (PIL)-based Cu 0 -Cu I tandem catalyst for the production of C 2 + products with both high reaction rate and high selectivity. Remarkably, a high C 2 + faradaic efficiency (FE C 2þ ) of 76.1 % with a high partial current density of 304.2 mA cm À 2 is obtained. Mechanistic studies reveal the numbers and highly dispersed Cu 0 -PIL-Cu I interfaces are vital for such reactivity. Specifically, Cu nanoparticles derived Cu 0 -PIL interfaces account for high current density and a moderate C 2 + selectivity, whereas Cu I species derived PIL-Cu I interfaces exhibit high activity for CÀ C coupling with the local enriched *CO intermediate. Furthermore, the presence of the PIL layer promotes the C 2 + selectivity by lowering the barrier of CÀ C coupling.

Converting CO2 into high value-added chemicals is a promising approach for CO2 utilization. It’s imperative to develop novel catalysts for both selective and high adsorption of CO2 and thereafter efficient...

In this study, the heterogeneously catalized alkoxycarbonylation of olefins with CO2 based on the SILP strategy was reported for the first time. The catalyst Ru@SILP was accessed by immobilization of...