| Abstrakt: |
Electrochemical CO2 reduction reaction (CO2RR) driven by clean electricity to obtain valuable chemicals is a feasible way to achieve carbon neutrality and is thus attracting increasing attention. Among different transition metal-based CO2RR catalysts, Pd is the unique one because of its potential-dependent 2e− reduction product distribution is tunable from formate to CO. Moreover, the interconversion between CO2 and HCOOH can be achieved at equilibrium potential only on Pd surfaces. Considering these advantages, this review summarizes recent research progress on Pd-catalyzed CO2RR in the past five years, including the new mechanistic understanding on Pd surfaces, and the rational design of Pd-based electrocatalysts. For mechanism studies, reaction pathways, adsorption configurations for the formate intermediate, and roles of adsorbed CO species are discussed. For catalyst discovery, both monometallic Pd and Pd-based catalysts with secondary metal and metalloid elements are overviewed. At the end, we put forward the possibility of utilizing Pd-based catalysts in electrolyzers to bridge the fundamental research and actual application of such catalysts. [ABSTRACT FROM AUTHOR] |
