Photoelectrocatalytic conversion of urea under solar illumination using Ni decorated Ti-Fe2O3 electrodes

Rebiai, Lamia; Muller-Bouvet, Diane; Benyahia, Raihana; Torralba, E.; Viveros, Melissa Lopez; Rocher, Vincent; Azimi, Sam; Cachet‐Vivier, Christine; Bastide, Stéphane

doi:10.1016/j.electacta.2022.141516

Cited by 9 publications

(2 citation statements)

References 41 publications

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“…Advances in the removal of urea via electrolysis and photo-electrocatalytic oxidation have also enabled the development of direct urea fuel cells 37 , 42 , 43 . Although early studies using NiOOH catalysts reported that urea is mostly converted into N 2 and CO 2 , data published in the past few years suggest that urea is mostly converted into nitrite (up to ~80%) as well as small amounts of cyanate and other by-products 45 – 47 , which are highly toxic. Both the selectivity towards N 2 over nitrite and the requirement for a high alkaline solution would have to be solved to enable an Ni-based catalytic system to be used for dialysate regeneration.…”

Section: Dialysate Regenerationmentioning

confidence: 99%

Portable, wearable and implantable artificial kidney systems: needs, opportunities and challenges

Ramada,

de Vries,

Vollenbroek

et al. 2023

Nat Rev Nephrol

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Haemodialysis is life sustaining but expensive, provides limited removal of uraemic solutes, is associated with poor patient quality of life and has a large carbon footprint. Innovative dialysis technologies such as portable, wearable and implantable artificial kidney systems are being developed with the aim of addressing these issues and improving patient care. An important challenge for these technologies is the need for continuous regeneration of a small volume of dialysate. Dialysate recycling systems based on sorbents have great potential for such regeneration. Novel dialysis membranes composed of polymeric or inorganic materials are being developed to improve the removal of a broad range of uraemic toxins, with low levels of membrane fouling compared with currently available synthetic membranes. To achieve more complete therapy and provide important biological functions, these novel membranes could be combined with bioartificial kidneys, which consist of artificial membranes combined with kidney cells. Implementation of these systems will require robust cell sourcing; cell culture facilities annexed to dialysis centres; large-scale, low-cost production; and quality control measures. These challenges are not trivial, and global initiatives involving all relevant stakeholders, including academics, industrialists, medical professionals and patients with kidney disease, are required to achieve important technological breakthroughs.

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Section: Dialysate Regenerationmentioning

confidence: 99%

Portable, wearable and implantable artificial kidney systems: needs, opportunities and challenges

Ramada,

de Vries,

Vollenbroek

et al. 2023

Nat Rev Nephrol

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“…Therefore, a range of visible-light responsive materials such as CdS, WO 3 , and Fe 3 O 4 were gradually developed as UOR photocatalysts. [49][50][51] Research on the latter combines the advantages of the pc-UOR and the e-UOR. Photoelectrodes can use narrow bandgap materials, such as Si-based materials.…”

Section: Introductionmentioning

confidence: 99%

Urea catalytic oxidation for energy and environmental applications

Gao,

Zhang,

Wang

et al. 2024

Chem. Soc. Rev.

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Copper‐Nickel Alloy Modified‐Silicon Photoanodes for Photoelectrochemical Water Oxidation and Urea Oxidation

Klahan,

Loget,

Pattanasattayavong

2024

ChemNanoMat

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The development of silicon (Si) photoanodes for photoelectrochemical (PEC) oxidation is highly crucial for the progress of solar‐driven hydrogen production. Apart from the typical water oxidation reaction or oxygen evolution reaction (OER), the urea oxidation reaction (UOR) is gaining more attention due to favorable thermodynamics. In this work, we study Si photoanodes modified with electrodeposited copper‐nickel (CuNi) alloy for OER and UOR. The optimized photoanodes exhibit a low onset potential of 1.15 V vs reversible hydrogen electrode (RHE) and a current density of 6 mA cm‐2 at 1.23 V vs RHE (the thermodynamic potential for water oxidation) for OER. Further, CuNi alloy‐modified photoanodes can drive the UOR at a lower onset potential (1.05 V vs RHE) and generate a higher current density of 31 mA cm‐2 at 1.23 V vs RHE. Importantly, the CuNi alloy can extend the stability for UOR under PEC conditions when compared to a planar Ni film deposited by a vacuum‐based process. This work demonstrates that CuNi alloy can further improve the properties of inhomogeneous metal‐insulator‐semiconductor Si photoanodes which can be efficiently utilized for both OER and UOR.

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Photoelectrocatalytic conversion of urea under solar illumination using Ni decorated Ti-Fe2O3 electrodes

Cited by 9 publications

References 41 publications

Portable, wearable and implantable artificial kidney systems: needs, opportunities and challenges

Portable, wearable and implantable artificial kidney systems: needs, opportunities and challenges

Urea catalytic oxidation for energy and environmental applications

Copper‐Nickel Alloy Modified‐Silicon Photoanodes for Photoelectrochemical Water Oxidation and Urea Oxidation

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