Heterostructured Bi-Cu2S Nanocrystals for Environment friendly CO2 Electroreduction to Formate


Electrochemical CO2 discount response (ECO2RR) pushed by renewable electrical energy holds promise to retailer intermittent vitality in chemical bonds whereas producing value-added chemical substances and fuels sustainably. Sadly, it stays a grand problem to concurrently obtain excessive Faradaic effectivity (FE), low overpotential, and excessive present density of ECO2RR. Herein, we report the synthesis of heterostructured Bi-Cu2S nanocrystals through a one-pot solution-phase technique. The epitaxial progress of Cu2S on Bi results in considerable interfacial websites and the resultant heterostructured Bi-Cu2S nanocrystals allow extremely environment friendly ECO2RR with largely decreased overpotential (240 mV decrease than Bi), near-unity FE (>98%) for formate manufacturing, and excessive partial present density (2.4- and 5.2-fold increased JHCOO- than Cu2S and Bi at -1.0 V vs. reversible hydrogen electrode, RHE). Density purposeful concept (DFT) calculations present that the electron switch from Bi to Cu2S on the interface results in the preferential stabilization of the formate-evolution intermediate (*OCHO).


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