High C–C cleavage efficiencies of ethanol oxidation reaction on mesoporous RhPt electrocatalysts

Abstract

Optimizing the structure of an electrocatalyst is critical to achieve its outstanding performance as well as to establish relationships between its composition and its performance. In this work, a series of mesoporous RhPt electrocatalysts (RhPt-MPS) with different compositions are designed and synthesized toward the ethanol oxidation reaction (EOR). The mesoporous structure of RhPt-MPS exposes abundant surface sites and channels for mass transfer of ethanol, and thus boosts the catalytic EOR performance. It has been confirmed that Rh not only reduces the oxidation potential of EOR, but also effectively facilitates the breakage of C─C bond. Stemming from structural and compositional advantages of the RhPt 0.6 -MPS electrocatalyst, it exhibits the highest activity (2846.0 mA mg -1 ) for the EOR when compared with other RhPt-MPS, Rh-MPS, and Pt-MPS electrocatalysts. It also delivers excellent stability and high selectivity than other electrocatalysts.

Designing bifunctional catalysts for urea electrolysis: progress and perspectives

“…213 In real wastewater, there will be diverse inorganic and organic pollutants that may influence the urea electrolysis efficiency by impairing the stability of catalysts. [214][215][216] Several studies have conducted real urine electrolysis, and the experimental results suggest that catalysts work worse in alkalized urine solution than in pure alkalized urea solution, 66,[217][218][219] though the reason remains unclear. As such, future studies are suggested to identify pollutants in real urearich electrolytes and analyze the effect of potential substances on urea electrolysis.…”

Recent advances in nanoscale engineering of Pd-based electrocatalysts for selective CO2 electroreduction to formic acid/formate

“…Generally, the Pd-M alloy strategy not only reduces Pd content and the overall cost of electrocatalyst but also regulates the electronic structure of Pd based on the synthetic effect among the active components. Introducing a foreign metal into the host metal to form an alloy could trigger strong electron transfer, optimize electronic structures, and create more active sites, thus resulting in the altered adsorption energy for intermediates [94][95][96] . More importantly, in practical ECO 2 RR, the modified electronic structure of Pd helps to improve the reaction kinetics and alter the surface atom configurations, thereby optimizing the bonding strength for reaction intermediates.…”

Template‐ and Surfactant‐Free Room Temperature Synthesis of Pt/C and Pt−Rh/C Nanowires/Nanoparticles for Ethanol Electro‐Oxidation

“…The addition of Rh can increase the yield of CO 2 production by promoting a more efficient CÀ C bond cleavage, also facilitating the removal of strongly adsorbed CO-like species. [6,7] The catalytic efficiency and selectivity of catalysts also depend on their size and shape. [8] The FC technology still suffers from the limited activity and stability of Pt nanoparticles (NPs), even for the best catalysts.…”

“…The most promising catalysts to fully oxidize ethanol involve alloying Pt with Rh. The addition of Rh can increase the yield of CO 2 production by promoting a more efficient C−C bond cleavage, also facilitating the removal of strongly adsorbed CO‐like species [6,7] …”