Rational construction of hierarchical Ni(OH)2–NiS in-plane edge hybrid nanosheet structures on the carbon cloth as a robust catalyst for electro-oxidation of urea

A review of hetero-structured Ni-based active catalysts for urea electrolysis

“…A hierarchical Ni(OH) 2 -NiS inplane edge hybrid nanosheet on a carbon cloth was found to have much higher UOR performance than that of the separated NiS and Ni(OH) 2 in an alkaline solution. 236 Tellurium has attracted increasing attention in the catalysis reaction due to its strong metallic property and tunable electronic structures. 237,238 The lattice distortion generated in the heterostructure of NiTe 2 coupled with Ni(OH) 2 was proposed favorable for electron interaction and active site exposure, thus enhancing the UOR catalytic performance.…”

“…A hierarchical Ni(OH) 2 –NiS in-plane edge hybrid nanosheet on a carbon cloth was found to have much higher UOR performance than that of the separated NiS and Ni(OH) 2 in an alkaline solution. 236…”

Roughening the surface of porous NiCoP rod-like arrays via the in situ growth of NiCoP4O12 nanoislands enables highly efficient energy storage

“…As a result, the electrode arrays based on two or more transition metal compounds often exhibit higher specific capacity compared to those composed of single transition metal elements. 17,18 Moreover, in the electrodes composed of a single transition metal, the addition of other anions also works well in adjusting the electronic structure and improving the energy storage capacity, such as ZnO/ZnS 19 and Ni(OH) 2 /NiS, 20,21 NiCo//Fe, 22 which is also a method to achieve a higher specific capacity.…”

Porous NiO Nanosheet Bifunctional Electrodes Modified with Ultrafine Ni3S2 Quantum Dots for Green Hydrogen Production via Urea Electrolysis

“…In water electrolysis, the rate-determining step (rds) is the OER occurring on the anode at the theoretical potential of 1.23 V vs SHE. , Finding alternative anodic reactions with much lower potentials is also a strategy to reduce power consumption for producing hydrogen via water electrolysis . Relevant studies have shown that nearly 80% of untreated urea (CH 4 N 2 O)-containing wastewater effluents is directly discharged into the environment every year, and nitrate (NO 3 – ) from the urea causes serious irreversible environmental pollution. − In addition, the thermodynamic potential of the urea oxidation reaction (UOR) is only 0.37 V vs SHE, which makes the electrolysis of urea for hydrogen production advantageous as it requires low energy consumption compared to water electrolysis (1.23 V vs SHE). − It has been recently reported that hydrogen production from urea electrolysis, and through the anodic urea oxidation, can significantly reduce the cost of produced hydrogen by 36%. , Therefore, large-scale application of urea electrolysis can be described as a strategy that “kills two birds with one stone”: it can effectively treat urea-containing wastewater effluents while generating hydrogen with low energy consumption.…”

“…18−20 It has been recently reported that hydrogen production from urea electrolysis, and through the anodic urea oxidation, can significantly reduce the cost of produced hydrogen by 36%. 21,22 Therefore, large-scale application of urea electrolysis can be described as a strategy that "kills two birds with one stone": it can effectively treat urea-containing wastewater effluents while generating hydrogen with low energy consumption.…”