ACS Nanoscience Au, Год журнала: 2024, Номер 4(5), С. 349 - 359

Опубликована: Авг. 8, 2024

Electrochemical semihydrogenation (ESH) of alkynes to alkenes is an appealing technique for producing pharmaceutical precursors and polymer monomers, while also preventing catalyst poisoning by alkyne impurities. Cu recognized as a cost-effective highly selective ESH, whereas its activity somewhat limited. Here, from mechanistic standpoint, we hypothesize that electron-deficient can enhance ESH promoting the rate-determining step alkene desorption. We test this hypothesis utilizing Cu-Ag hybrids electrocatalysts, developed through welding process Ag nanoparticles with nanowires. Our findings reveal these rationally engineered exhibit notable enhancement (2-4 times greater) in conversion rates compared isolated NPs or NWs, maintaining over 99% selectivity products. Through combination operando computational studies, verify electron-depleted sites, resulting electron transfer between nanowires, effectively weaken adsorption alkenes, thereby substantially boosting activity. This work not only provides insights into but stimulates compelling strategies involving hybridizing distinct metals optimize

Язык: Английский