A phosphorus modified mesoporous AuRh film as an efficient bifunctional electrocatalyst for urea-assisted energy-saving hydrogen production

Abstract

Hybrid water electrolysis system composed of anodic urea oxidation reaction (UOR) and cathodic hydrogen evolution reaction (HER) has been regarded as a green and sustainable route to alleviate global energy...

Designing bifunctional catalysts for urea electrolysis: progress and perspectives

“…Compared with earth-abundant transition metal-based catalysts, there is no clear advantage in the performance of noble metal-based catalysts, and thus most studies focus on low-cost transition metals, especially Ni. 195 1 M KOH + 0.33 M urea 1.32 Noble metal SAC on defective LDH nanosheets P-modified AuRh 85 1 M KOH + 0.33 M urea 1.33 Mesoporous noble metal alloy film, surface chemical modification Rh/NiV-LDH 63 1 M KOH + 0.33 M urea 1.336 Noble metal SAC on ultrathin LDH nanosheets Ni-Co-B 81 1 M KOH + 0.33 M urea 1.34 Porous and amorphous metallic structure NiFeRh-LDH 120 1 M KOH + 0. To further identify high-performance catalysts, the E 10 of ten most promising electrocatalysts in both electrolyte systems is analyzed (Table 2).…”

“…Alloying is a powerful strategy to raise metals’ intrinsic activity by tuning their electronic properties. Several bimetallic alloys have exhibited favorable performance toward urea electrolysis, such as AuRh, 85 Cu 0.5 Ni 0.5 , 86 and Ni–Mo alloy. 13 Although the noble metal-based AuRh catalyst has an excellent activity for urea electrolysis ( E 100 = 1.47 V), 85 the high price of Au and Rh would limit its practical applications.…”

Modulation Strategies for the Preparation of High‐Performance Catalysts for Urea Oxidation Reaction and Their Applications

“…Au is capable of improving catalyst stability and activity, and P is capable of significantly adjusting active sites’ electronic structure. [ 166 ] Self‐supporting mesoporous films have a large active surface area, accessible active sites, and excellent electrochemical stability. [ 167 ] Compared with the electrochemical test of mAuRh film / NF, the incorporation of P can effectively inhibit the dissolution of the catalyst and increase the active surface area.…”

Crystalline–Amorphous Ni3S2–NiMoO4 Heterostructure for Durable Urea Electrolysis-Assisted Hydrogen Production at High Current Density

“…Urea electrolysis is considered as a cost-efficient and promising strategy to treat urea-rich wastewater and produce clean hydrogen. − However, the sluggish reaction kinetics caused by the 6e – in urea oxidation reaction (UOR) severely lower the reaction rate of urea electrolysis. To enhance its reaction efficiency, catalysts with high activity should be applied to reduce the energy barriers.…”