A Polymer Solution To Prevent Nanoclustering and Improve the Selectivity of Metal Nanoparticles for Electrocatalytic CO₂ Reduction

Abstract

CO2‐Reduktion. Polymere NHC‐Liganden verbessern die Katalyseeffizienz und Lebensdauer von Au‐ und Pd‐Nanokatalysatoren zur CO2‐Elektroreduktion, wie B. Liu, J. He et al. im Forschungsartikel auf S. 15981 ff. zeigen.

Stability and Degradation Mechanisms of Copper‐Based Catalysts for Electrochemical CO2 Reduction

“…[74,75] Strongly bound carbene based ligands were instead shown to stabilize the morphology of these electrocatalysts, leading to enhanced stability for selective CO formation. [76]…”

Stability and Degradation Mechanisms of Copper‐Based Catalysts for Electrochemical CO2 Reduction

“…Common ligands such as thiols or amines are readily electrodesorbed, which leads to sintering and coagulation of Au, Pd, and Ag nanoparticles . Strongly bound carbene based ligands were instead shown to stabilize the morphology of these electrocatalysts, leading to enhanced stability for selective CO formation …”

Synthesis and Electrocatalytic HER Studies of Carbene-Ligated Cu3-xP Nanocrystals

“…It has been demonstrated that NHC ligands have the ability to enhance nanocrystal catalyst stability and increase nanocrystal catalyst activity and/or selectivity. [9][10][11][12] NHC-stabilized nanocrystals have been shown to display catalytic activity toward, for example, hydrogenations and semihydrogenations, 9,[12][13][14] lactonization, 10 asymmetric arylations, 15 Buchwald-Hartwig aminations, 16 and cross-coupling reactions. 15 NHC-stabilized nanocrystals have also been shown to be competent electrocatalysts for CO2 reduction.…”

“…15 NHC-stabilized nanocrystals have also been shown to be competent electrocatalysts for CO2 reduction. 11,17 For example, Cao et al investigated the use of NHC-stabilized Au nanocrystals as electrocatalysts for the reduction of CO2 to CO. Interestingly, the Au nanocrystal catalyst with surface-bound carbene ligands exhibited a higher Faradaic efficiency for CO2 reduction to CO than did bare (or ligand-less) Au nanoparticles; it was further shown that the NHC affected the mechanistic pathway of catalysis. 17 Despite the proven benefits of applying NHC ligands to nanocrystal catalysts, they have thus far only been supported on metal nanocrystal catalysts (e.g., Ru, Au, Pt, Pd, Cu).…”

“…17 Despite the proven benefits of applying NHC ligands to nanocrystal catalysts, they have thus far only been supported on metal nanocrystal catalysts (e.g., Ru, Au, Pt, Pd, Cu). [9][10][11][12][13][14][15][16][17][18] Therefore, the potential utility of NHC ligands as supporting ligands for other types of nanocrystal catalysts is currently unknown. Certain metal phosphide nanocrystals have emerged as an important class of catalysts for reactions such as hydrodesulfurization, [19][20][21] hydrodeoxygenation, 22 and the hydrogen evolution reaction (HER).…”