Interface engineering of bifunctional nickel hydroxide/ nickel phosphide heterostructure for efficient intermittent hydrazine-assisted water splitting

Spindle Nanorods of CeO2 and NiS Heterointerface Coated by the NC Layer: A High-Performance Bifunctional Electrocatalyst for Water Splitting

“…It is worth noting that NC/NiS-CeO 2 has a stronger S–O strength, which can better prevent self-oxidation in subsequent OER reactions. , The altered binding energies indicate that Ni and S species are both partially positively charged after compounding with CeO 2 , suggesting the electron redistribution of the heterostructures. It can optimize reaction kinetics and decrease charge-transfer resistance, leading NC/NiS-CeO 2 with excellent performance of HER and OER. − Moreover, the content of O 2 in NC/NiS-CeO 2 is significantly more than that in Ni-CeO 2 , indicating that a large number of oxygen vacancies may be generated during the formation of NC/NiS-CeO 2 heterostructures, which is consistent with Raman results. Moreover, as shown in Figure S3, the EPR signals at g = 2.002, show higher oxygen vacancies of NC/NiS-CeO 2 by comparing with Ni-CeO 2 .…”

Two‐Dimensional Layered Hydroxide Materials for Nucleophile Oxidation

“…Such modifications can enhance key properties, including conductivity and catalytic activity, thereby enhancing the efficacy of LHMs in electrolysis applications; iv) Furthermore, the integration of LHMs with various materials, including carbon-based compounds, [24] TMDs, [25] metal phosphides and nitrides, results in synergistic enhancements of the material's overall functionality. [26] The hybridized material notably improves conductivity and minimizes charge transfer resistance; v) Further, modifying the surface of LHMs through functionalization allows for the customization of surface characteristics, including hydrophobicity, hydrophilicity, charge distribution, and molecular interactions, functionalization of electrocatalyst surface can also potentially lead to desired product selectivity for complicated electrochemical processes; [27] vi) Finally, the engineered generation of vacancies within the hydroxide structure emerges as a vital approach to obtain unsaturated metal ions/oxygen ions, possessing elevated surface energy and metal-oxygen interactions within the material. This process effectively multiplies the available binding sites for electrolytes, thereby enhancing the reactivity and efficiency of the LHMs in catalytic reactions.…”

Revealing the Impact of Pulsed Laser-Produced Single-Pd Nanoparticles on a Bimetallic NiCo2O4 Electrocatalyst for Energy-Saving Hydrogen Production via Hybrid Water Electrolysis

“…19−21 Currently, addressing the environmental impact of residual hydrazine in wastewater is crucial, given its high toxicity to both human health and ecosystems. 22,23 The electrooxidation of hydrazine into environmentally friendly nitrogen (N 2 ) offers an effective method for treating hydrazine-containing wastewater without requiring additional oxidants. Furthermore, during the HzOR (N 2 H 4 + 4OH − → N 2 + 4H 2 O + 4e − ), additional protons are released into the electrolyte, enhancing the H 2 production rate at the cathode.…”

“…In the past few decades, the development of hybrid water electrolysis utilizing a hydrazine oxidation reaction (HzOR) instead of an anodic sluggish OER has exhibited great potential for energy-saving H 2 production. HzOR is characterized by faster reaction kinetics and a significantly lower theoretical overpotential (−0.33 V vs RHE). − Currently, addressing the environmental impact of residual hydrazine in wastewater is crucial, given its high toxicity to both human health and ecosystems. , The electrooxidation of hydrazine into environmentally friendly nitrogen (N 2 ) offers an effective method for treating hydrazine-containing wastewater without requiring additional oxidants. Furthermore, during the HzOR (N 2 H 4 + 4OH – → N 2 + 4H 2 O + 4e – ), additional protons are released into the electrolyte, enhancing the H 2 production rate at the cathode. , Additionally, replacing the anodic OER with HzOR has the potential to facilitate the assembly of a membrane-free water electrolyzer, producing risk-free H 2 /N 2 gases. − Thus, integrating the HER and HzOR in the overall hydrazine splitting (OHzS) electrolyzer not only enables low-voltage-driven electrocatalytic H 2 production but also supports the degradation of hydrazine in wastewater into N 2 and water, effectively achieving dual objectives with a single strategy.…”