Construction of desert rose flower-shaped NiFe LDH-Ni₃S₂ heterostructures via seawater corrosion engineering for efficient water-urea splitting and seawater utilization

Abstract

The development of high-performance and robust non-precious metal-based catalysts to accelerate electrocatalytic reaction kinetics is crucial for electrochemical seawater splitting. The common electrocatalysts for seawater electrolysis suffer from sluggish reaction...

Modulating the electronic structure of ultra-thin NiCo-LDH by FeNiCoS4 for efficient electrocatalytic urea oxidation

“…44 Fig. 3e shows the Fe 2p XPS spectrum of NiCo-LDH/FeNiCoS 4 ; Fe 2p 1/2 has two jump peaks for Fe 3+ (725.8 eV) and Fe 2+ (722.1 eV), whereas the jump peaks for Fe 2p 3/2 are located at binding energies of 713.5 eV (Fe 3+ ) and 710.6 eV (Fe 2+ ), 45 respectively. The O 1s spectrum of the catalyst shown in Fig.…”

Recent progress on 2D material-based nanoarchitectures for small molecule electro-oxidation

“…Additionally, Wang and co-workers utilized seawater corrosion and ion exchange strategies to synthesize a nickel–iron layer double hydroxide and Ni 3 S 2 heterostructured nano-low molecular (NiFe LDH-Ni 3 S 2 ) as bifunctional electrocatalyst. 154 Due to the presence of NiFe LDH and Ni 3 S 2 heterostructures which can promote efficient mass diffusion, enhances the reaction kinetic, The NiFe LDH-Ni 3 S 2 shows an obvious reduced UOR potential of 1.37 V to reach 100 mA cm −2 in 1 M KOH seawater and 0.33 M urea, which is superior to commercial catalysts such as Pt/C and RuO 2 .…”

Constructing CoNi-LDH/Fe MOF/NF Heterostructure Catalyst for Energy-Efficient OER and UOR at High Current Density

“…16 Second, electrocatalytic UOR can be used to treat urea-rich sewage, so as to achieve the dual purpose of producing clean energy and solving environmental problems. 17 However, UOR is a six-electron transfer process, 18,19 therefore, high-performance catalysts that can solve the problem of sluggish kinetic at the anode are very important and desirable. 20,21 So far, precious metal oxides like RuO 2 and IrO 2 have demonstrated the most efficient electrocatalysts for OER and UOR.…”

“…This significant difference in potential can greatly reduce the electrolytic energy consumption during OWS for H 2 production . Second, electrocatalytic UOR can be used to treat urea-rich sewage, so as to achieve the dual purpose of producing clean energy and solving environmental problems . However, UOR is a six-electron transfer process, , therefore, high-performance catalysts that can solve the problem of sluggish kinetic at the anode are very important and desirable. , So far, precious metal oxides like RuO 2 and IrO 2 have demonstrated the most efficient electrocatalysts for OER and UOR. , However, their high prices and low reserves them make it difficult to achieve large-scale applications .…”