Related references
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Article
Engineering, Chemical
Zihuan Yu et al.
Summary: A high-performance and ultra-durable electrocatalyst MoOx/Ni3S2/NF with MoOx/Ni3S2 heterostructure is synthesized by solvothermal method. The optimized catalyst MoOx/Ni3S2/NF-11 exhibits excellent hydrogen evolution reaction (HER) performance with low overpotential and small Tafel slope. It also shows high catalytic stability for more than 100 hours. The heterostructure and oxygen vacancy contribute to the improved HER performance by reducing Gibbs free energy and facilitating surface reconstruction.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2023)
Article
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Pengtang Wang et al.
Summary: A cobalt, germanium co-doped nickel oxyhydroxide catalyst is reported that effectively converts urea to nitrite and enhances electron transfer and current. Through synchrotron-based measurement, in situ spectroscopy and density functional theoretical computation, it is demonstrated that the co-doping of cobalt and germanium optimizes the electronic structure of nickel sites, promoting the cleavage of the C-N bond and conversion of urea to nitrite.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Hyogyun Roh et al.
Summary: Hierarchical NiMo-WOx and NiCo-WOx nanowires were synthesized as efficient electrocatalysts for hydrogen evolution reaction (HER) and urea oxidation reaction (UOR) through a facile two-step process. The assembled electrodes achieved low voltage urea electrolysis and high hydrogen production efficiency.
APPLIED SURFACE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Jiao Lan et al.
Summary: Conversion of organic nitrogen compounds into high-value-added products through electrochemical C-N coupling reactions under ambient conditions is a sustainable strategy for achieving carbon neutrality and high-value utilization of harmful substances. In this study, a Ru1Cu single-atom alloy was used to selectively synthesize formamide from carbon monoxide and nitrite, achieving high formamide selectivity with a Faradaic efficiency of 45.65 +/- 0.76% at -0.5V vs. RHE. The use of adjacent Ru-Cu dual active sites enables the spontaneous coupling of *CO and *NH2 intermediates, facilitating high-performance electrosynthesis of formamide. This work provides insights into the electrocatalysis of high-value formamide through the coupling of CO and NO2- under ambient conditions, leading to the synthesis of more sustainable and valuable chemical products.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Min Li et al.
Summary: In this study, a hierarchical structure NiSe@Ni12P5/NCF catalyst was synthesized and applied to urea-assisted electrolytic water reaction, exhibiting excellent electrocatalytic performance and stability. This study provides a new idea for the electrochemical application of hierarchical selenide-phosphides.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Xiaoyu Chi et al.
Summary: The Ni-N@C-400 composite, with nickel nanocrystals anchored on nitrogen-doped carbon, exhibits excellent performance for urea oxidation reaction due to its mesoporous structure and the presence of active sites.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Rui Zhang et al.
Summary: Doping modification can effectively improve the electrocatalytic activity of nickel sulfide. In this study, Fe-doped Ni3S2 nano-sheets with abundant active sites were supported on Ni foam using a simple hydrothermal process. The FeMo-Ni3S2/NF catalyst exhibited excellent activity and stability towards oxygen evolution reaction (OER) with a low overpotential of 180 mV at a current density of 10 mA cm(-2) in 1 M KOH. The catalytic activity was found to be proportional to the doping amount of Fe atoms, confirming that the active sites of the catalyst were induced by the introduction of atomically dispersed Fe.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Mengxiao Zhong et al.
Summary: This study reports the fabrication of NiS nanotubes as an efficient electrocatalyst for urea oxidation reaction through a novel template-directed hydrothermal reaction. The NiS nanotubes show superior UOR performance with a low potential and excellent stability, and can also be used as an anode for overall water splitting to reduce the working voltage. This research provides a rationale for the development of high-efficiency non-precious metal-based UOR catalysts.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Zihuan Yu et al.
Summary: This study fabricates a novel electrocatalyst MoOxSy/Ni3S2/NF, which promotes the hydrogen evolution reaction and exhibits comparable performance to Pt-C/NF under acidic conditions.
CHEMISTRY OF MATERIALS
(2022)
Article
Energy & Fuels
Supriya A. Patil et al.
Summary: This study reports the synthesis of vanadium sulfide micro-flowered structure with the assistance of ethylene glycol. The ethylene glycol mediated vanadium sulfide electrode showed significantly enhanced catalytic activity in urea oxidation and hydrogen evolution reactions. Compared to conventional water-splitting, the ethylene glycol mediated electrode demonstrated a remarkable reduction in urea decomposition potential. This research provides a promising approach for the development of inexpensive and efficient electrocatalysts.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Xingxiu Zhang et al.
Summary: Urea-assisted water electrolysis is an energy-saving strategy for hydrogen production and wastewater treatment. The key to solving these challenges lies in efficient bifunctional electrocatalysts for urea oxidation reaction (UOR) and hydrogen evolution reaction (HER). In this study, Fe-doped Ni-based MOF nanosheet arrays (FeNi-MOF NSs) were synthesized through a one-step hydrothermal method for efficient urea-assisted water electrolysis. The FeNi-MOF NSs achieved high current densities of 10 and 100 mA cm-2 at overpotentials of 131 and 155 mV, respectively, in UOR. The excellent UOR performance was attributed to electronic structure reconstruction induced by Fe-doping in the MOF, which promoted the formation of abundant high-valence Ni active centers for UOR and created more electronic states with optimized adsorption energies for reactant and product molecules on the surface, benefiting the UOR kinetics. The FeNi-MOF NSs were also used for HER, and a urea electrolyzer was assembled with a low cell voltage and excellent stability during long-term electrolysis.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Xinyue Zhang et al.
Summary: Restructuring the atomic arrangement around nickel active sites through iron implantation and cerium substitution strategies allows for diversification of crystallographic orientations. The formation of phase interfaces further improves the electronic configuration of nickel active species, enhancing the efficiency of electrochemical water splitting.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Dongdong Zhu et al.
Summary: The urea oxidation reaction (UOR) is a crucial half-reaction for urea-assisted water splitting, direct urea fuel cells, and electrochemical degradation of urea-containing wastewater. This perspective provides insights into the reaction mechanism of UOR, and discusses strategies for designing efficient UOR electrocatalysts. The remaining challenges and future opportunities in this emerging field are also outlined.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Engineering, Chemical
Min Wei et al.
Summary: This study demonstrates the improvement of Cu-doped Ni3S2 nanosheets catalysts in urea oxidation reactions. Cu doping changes the morphology of the catalyst, increases the active surface area, and regulates its electronic structure. The Cu-doped catalyst exhibits outstanding performance in UOR and HER, making it suitable for urea oxidation electrolyzers.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
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Na Wu et al.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Supriya A. Patil et al.
Summary: In this study, a binder-free thin film of bimetallic Cu-Fe-based metal-organic frameworks (Cu/Fe-MOFs) was synthesized via drop-casting method. The Cu/Fe-MOF electrode demonstrated lower urea oxidation reaction (UOR) potentials and higher current densities compared to the pristine Fe-MOF electrode synthesized using a similar method. It also exhibited long-term electrochemical stability during UOR.
Article
Chemistry, Physical
Chao Wang et al.
Summary: In this study, a series of Fe doped NiCoM materials with unique structure were synthesized and the Fe-NiCoP electrode showed superior electrochemical activity for urea oxidation reaction and hydrogen evolution reaction, indicating its potential for practical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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Chemistry, Physical
Yang Zheng et al.
Summary: Ternary CoFe1-XMnX layered double hydroxides with nanosheet-nanowires hierarchical nanostructure grown on nickel form were synthesized. The introduction of Mn can alter the crystal phase, morphology, and electronic structure of CoFe-LDH, resulting in superior OER and UOR performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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Engineering, Environmental
Baojie Zhang et al.
Summary: The rate-determining step of urea oxidation reaction (UOR) has been regulated by combining electrochemical reconstructed Co hydroxide catalyst with V single atoms, resulting in improved reaction performance and suppressed oxygen evolution.
CHEMICAL ENGINEERING JOURNAL
(2022)
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Chemistry, Physical
Qiuhan Cao et al.
Summary: This study successfully developed vanadium-doped nickel (V-Ni(OH)(2)) catalyst with highly efficient electrocatalytic activity for direct urea fuel cells. The introduction of vanadium not only promotes the phase transformation of nickel and the generation of high-valence Ni3+, but also enhances the electrocatalytic activity and reaction rate of the catalyst.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
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Xue Li et al.
Summary: This study successfully synthesized NiFeCoSe2 nanosheets and demonstrated significantly improved electrocatalytic performance and stability in a highly alkaline medium. The unique nanosheet structure, binder-free in-situ selenium electrodeposition, synergistic effect, and strong electron interaction contribute to the excellent performance of NiFeCoSe2 in the oxygen evolution reaction and urea oxidation reaction.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Electrochemistry
Haiqing Yan et al.
Summary: This study develops a hierarchical Fe(OH)(3)@Ni3S2/NF system as an excellent electrocatalyst for oxygen evolution reaction (OER) by synthesizing Ni3S2 on nickel foam and attaching amorphous Fe hydroxide nanoparticles via facile hydrolysis. The catalyst exhibits low overpotentials, high current densities, and strong durability, which can be attributed to the interfacial interaction and synergistic effect between Fe(OH)(3) and Ni3S2. These findings offer new ideas for the design of novel OER electrocatalysts and have significant value.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Ying Ye et al.
Summary: This study successfully fabricated a NiFe LDH@Ni(OH)(2)-z p-n heterostructure with abundant oxygen vacancies, which optimized the performance of oxygen evolution reaction (OER) and urea oxidation reaction (UOR) through modulation of D-band center and increase of active sites. The surface reconstruction facilitated the adsorption of reaction intermediates and accelerated charge transfer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Fan Chen et al.
Summary: In this study, Mn-doped nickel hydroxide porous nanowire arrays were developed as efficient catalysts for urea oxidation reaction (UOR). By modulating the electronic structure and providing abundant spaces/channels, the Mn-Ni(OH)2 PNAs exhibited low potential and stable UOR performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Jichao Zhang et al.
Summary: Layered hydroxides have superior catalytic activity for electrocatalytic organic compound oxidation, but metal leaching can cause uncontrollable structural phase transformation. In this study, a Cr-Ni(OH)(2) electrocatalyst was used as a pre-catalyst model to investigate the structure-performance relationship. The optimized electrocatalyst showed excellent performance, with a low potential of 1.38 V (vs RHE) to reach 100 mA cm(-2) and stable activity over 200 h at 10 mA cm(-2). In situ analyses and theoretical calculations demonstrated that well-tuned electronic structures and a superhydrophilic-superaerophobic surface enabled rapid urea oxidation reaction kinetics, reducing specific adsorption OH- and suppressing Cr dopants leaching, thus maintaining high urea oxidation performance. Furthermore, mass transfer improvement played a crucial role in alleviating structural decay under high potentials.
Article
Chemistry, Inorganic & Nuclear
Nabeen K. Shrestha et al.
Summary: This work presents a simple and scalable synthetic strategy to deposit reduced graphene oxide (rGO) nanosheets integrated with Ni-Fe-based hydroxide nanocatalysts on nickel foam (NF) for enhanced oxygen evolution reaction (OER) activity. The synergistic interactions among the hydroxides, rGO, and NF result in improved catalytic sites and charge transport. The rGO-incorporated electrode also demonstrates excellent urea decomposition (UOR) current density.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Yao Zhang et al.
Summary: Using a urea oxidation reaction instead of an oxygen evolution reaction is an effective method for reducing energy costs. This study fabricated a mixed phase structure of nickel molybdate catalyst and demonstrated its improved activity in the urea oxidation reaction.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Multidisciplinary
Runjia Lin et al.
Summary: This study investigates the competition between electrocatalytic organic compound oxidation reactions (OCORs) and oxygen evolution reaction (OER) using NiWO4-catalysed urea oxidation reaction (UOR) as an example. The competition is attributed to insufficient surface concentration of dynamic Ni3+. To address this issue, a controllable reconstruction of pseudo-crystalline bimetal oxides design strategy is proposed, resulting in an optimised electrocatalyst with significantly improved performance in alkaline urea electrolysis.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Zihuan Yu et al.
Summary: A novel efficient hydrogen electrocatalyst, MoOxSy/Ni3S2/NF, was fabricated with outstanding performance under acidic conditions, demonstrating ultra-low overpotential and high stability. The internal structure was determined using X-ray absorption techniques, and a [Mo2O2(S,O)(4)] dimer was proposed as the key active site.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Shan Ni et al.
Summary: The constructed NiSe2/FeSe2 p-p heterojunction exhibits superior electrocatalytic activity for both OER and UOR, showcasing low overpotentials and high current densities compared to other selenides and even RuO2. The designed built-in electric field and self-driven electron transfer at the heterointerface contribute to the exceptional performance of the electrocatalyst.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Yi Zhang et al.
Summary: The study developed novel Ni2P/C nanosphere hybrids with a hollow york-shell structure for urea oxidation reaction applications, demonstrating promising potential in urea fuel cells with optimized crystallinities and hollow configurations.
CHINESE CHEMICAL LETTERS
(2021)
Article
Engineering, Environmental
Supriya A. Patil et al.
Summary: The study successfully synthesized self-standing nanocuboids anchored on carbon nanotubes via an ion-exchange strategy, exhibiting excellent overall water-splitting and urea oxidation performance.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Jianan Li et al.
Summary: Urea electrolysis is a promising technology for simultaneous H-2 production and nitrogen suppression in water energy production. However, prevalent nickel-based catalysts may over-oxidize urea into NO2- products, posing potential environmental hazards. Through experiments and calculations, a nitrogen-fate network was derived, leading to the development of a polyaniline-coating strategy to increase N-2 production. These findings offer insights into nitrogen fate in water-energy systems.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Energy & Fuels
Shi-Kui Geng et al.
Summary: Researchers have found that the nickel ferrocyanide catalyst can drive the urea oxidation reaction with higher activity and stability. Moreover, the catalyst appears to operate via a different pathway, which facilitates the efficiency of ammonia production.
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Chemistry, Physical
Han Yang et al.
Summary: The manganese nickel phosphide nanosheets (MnxNi2-xP) developed in this work serve as a bifunctional electrocatalyst towards OER and UOR with superior performance, requiring low overpotential and showing impressive longevity. Experimental and theoretical methods confirm MnxNi2-xP as an effective bifunctional electrocatalyst for both OER and UOR due to its benign electronic conductivity and efficient active sites for the OH- adsorption.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Han Xu et al.
Summary: This study presents a high-efficiency Mo-doped Ni3S2 nanoforest catalyst with excellent activity and durability for hydrogen generation via urea electrolysis. The incorporation of Mo altered the catalyst morphology and electronic structure, leading to increased active sites and optimized adsorption energy for intermediates. The electrolysis cell exhibited low voltage and excellent durability, showcasing potential for efficient electrocatalysts in energy conversion and sewage treatment applications.
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JOURNAL OF PHYSICAL CHEMISTRY B
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