CO₂ electroreduction on bimetallic Pd–In nanoparticles

Abstract

<p>The interaction of In and Pd in bimetallic particles causes dramatic changes in the CO₂ reduction behavior.</p>

Modulation of the selectivity of CO2 to CO electroreduction in palladium rich Palladium-Indium nanoparticles

“…Previous results [41] have shown that the presence of Pd in Inrich bimetallic particles can decrease the selectivity of the In system for the reduction of CO 2 to formate. Combined with the present results, we provide a comprehensive investigation of the evolution of the behavior of Pd-In bimetallic nanoparticles in regard to the electroreduction of CO 2 .…”

Towards the Large-Scale Electrochemical Reduction of Carbon Dioxide

“…This is supported by linear sweep voltammetry (LSV) data indicating that the alloying of Pd with Ag results in a lower CO stripping peak due to a weaker Pd-CO bond and, hence, a lower energy requirement for the removal of CO from the catalyst surface (Figure 13b) [51]. However, while positive results have been obtained by alloying Pd with Au [103] and Sn [63], the CO poisoning resistance of the partially covalent Pd-In alloy comes at the expense of the CO2-reduction activity [52]. Additionally, intermetallic compound studies may be important in resolving poisoning behaviors by tuning the geometric and electronic effects to obtain a catalyst with the desired adsorption behavior [87,101].…”

“…Many studies have reported that the performance of the electrocatalytic CO2 reduction reaction (CO2RR) is compromised during electrolysis [2,[50][51][52]. This is often attributed to catalyst deactivation by the adsorption of reaction intermediates.…”

“…Thus, density-functional theory (DFT) calculations have often revealed higher binding energy between the poisoned catalysts and the implicated species. For instance, Pd metal is known to bind strongly to CO and is more likely to be poisoned and undergo activity degradation in a short duration of time due to the reduction of CO2 to CO [50][51][52]. The strong CO adsorption arises from an increase in 2π* back donation interaction (i.e., electron donation from the d orbitals of the metal substrate to the 2π* orbital of CO) as the formed bonding resonances are filled at a more negative potential [57].…”

Towards Sustainable Oxalic Acid from CO2and Biomass

“…They consist of metals typically located at the left‐hand branch of Trassati's volcano plot such as silver, tin, lead, mercury, zinc, or indium (Figure 9). [213,214] Bi‐ or multi‐metallic systems, which are complex yet easy to produce, are promising candidates for improving selectivity and lowering overpotentials [215,216] . An early mechanistic study by Hori et al.…”