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Article
Engineering, Environmental
Zhaolong Wang et al.
Summary: The NiMoV LDH/NF electrode prepared by doping engineering strategy shows high-efficiency catalysis for urea oxidation reaction, benefiting from its unique 2D/3D hierarchical structure that exposes more active sites and accelerates charge and mass transfer. Mo and V dopants optimize the adsorption energy of Ni sites for urea molecules, leading to a lower potential for UOR in alkaline electrolyte, achieving rapid kinetics, high intrinsic activity, and robust durability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Zhijiao Ji et al.
Summary: This study achieved energy-saving urea electrooxidation by constructing a Co, V co-doped NiS2 ternary collaborative system, improving both activity and stability. Through a series of experiments and theoretical studies, the roles of Ni, Co, and V elements in the catalytic process were clearly revealed.
Article
Chemistry, Multidisciplinary
Fangxu Lin et al.
Summary: Moderate adsorption of oxygenated intermediates plays a crucial role in the rational design of high-efficiency oxygen reduction reaction (ORR) electrocatalysts. Defect engineering, which can adjust the coordination environment of catalytic active sites, is a reliable strategy for tuning the geometric structure of nanomaterials. However, it remains challenging to uniformly disperse high-coordinated defects into ultrathin 2D nanosheets due to the limitations of controllable nanocrystal fabrication. This study introduces atomic-scale cavities (ASCs) as a new type of high-coordinated active site and successfully incorporates them into suprathin Pd (111)-exposed metallene for enhanced ORR performance.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Libo Wu et al.
Summary: This study demonstrates a heterogeneous Ni-MoN catalyst with outstanding performance for high-current-density water electrolysis. The catalyst, consisting of nanoparticles and nanorods, possesses abundant active sites and a hydrophilic surface that facilitates gas-release and prevents catalyst degradation. Theoretical calculations confirm the synergistic effect of Ni and MoN, as well as the improved water-dissociation kinetics at the Mo sites.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chengli Rong et al.
Summary: The development of bifunctional water-splitting electrocatalysts that are efficient and stable over a wide range of pH is crucial but challenging. This study reports an atomically dispersed Ru/Co dual-sites catalyst anchored on N-doped carbon (Ru/Co-N-C) for excellent oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in both acidic and alkaline electrolytes. The catalyst shows superior performance compared to benchmark catalysts Pt/C and RuO2, with low overpotentials and high current densities. Theoretical calculations and experimental results demonstrate that the introduction of Co-N4 sites into Ru/Co-N-C modifies the electronic structure of Ru and enhances the bonding strength with oxygen/hydrogen intermediate species, leading to improved OER and HER performance. Furthermore, the incorporation of Co-N4 sites improves the corrosion-resistance of Ru/Co-N-C during electrolysis. The Ru/Co-N-C catalyst has been successfully applied in a proton exchange membrane water electrolyzer and shows stable operation at a high current density.
ADVANCED MATERIALS
(2022)
Article
Engineering, Environmental
Jiayang Zhao et al.
Summary: In this study, a novel defect-rich electrocatalyst was fabricated using a combination of hydrothermal, annealing, and electrodeposition methods. The electrocatalyst exhibited high activity and stability in water-to-hydrogen conversion and urea electrolysis. This research provides a promising pathway for the design of efficient electrocatalysts in energy-saving water-to-hydrogen conversion.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Shemsu Ligani Fereja et al.
Summary: This article presents a 3D NiS2/MoO2 hybrid heterostructure with W doping, grown on conductive carbon cloth, demonstrating excellent catalytic performance for urea oxidation reaction (UOR) and hydrogen evolution reaction (HER). The catalyst exhibits high efficiency, low energy consumption, and excellent stability, which is significant for energy-saving electrochemical hydrogen production.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Jianxin Kang et al.
Summary: This study reports the discovery of two-electron transfer in monolayer Ni(OH)2 nanosheets, which is different from the traditional one-electron transfer found in multilayer materials. The experimental results show that the monolayer material has an exceptional redox capacity nearly two times higher than the theoretical capacity of one-electron processes. In situ experiments further demonstrate that the monolayer material can transfer two electrons, while the bulk material can only undergo partial transformation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Zemin Sun et al.
Summary: This study presents a novel magnetic site spin-splitting strategy to optimize the electronic structure and spin states of Fe-III sites using the Jahn-Teller effect of Cu2+ for enhanced oxygen evolution reaction (OER) activity. The Cu-1-Ni6Fe2-LDH catalyst exhibits excellent OER performance under magnetic field assistance, providing new principles for high-performance catalyst development and understanding of spintronic catalytic mechanisms.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Qianqian He et al.
Summary: Ultrafine nanowires of metals are synthesized and stabilized using single-walled carbon nanotubes (SWCNTs) as templates, and they show impressive catalytic performance in oxygen reduction reaction (ORR) and lithium-oxygen batteries.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Tianyun Jing et al.
Summary: Ultrafine FeOx catalysts show promise for oxygen evolution reaction (OER) activity, but there is room for improvement compared to commercial catalysts. Hydroxyl modification improves catalytic activity and stability, bringing the catalysts closer to scale-up and commercialization stages.
Article
Chemistry, Physical
Ali Abdelhafiz et al.
Summary: This study reports an in situ synthesis of non-noble metal high entropy oxide catalysts on carbon fibers by rapid Joule heating and quenching. The synthesized high entropy oxide nanoparticles show higher activity and stability compared to noble metal catalysts, with dynamic structural and chemical perturbations activated through the oxygen evolution reaction process.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Linwei Jiang et al.
Summary: In this study, a highly efficient electrocatalyst with Mo particles anchored on the Ni-P matrix was fabricated and used for urea-assisted water electrolysis. The results showed that the electrocatalyst could maintain a stable current density at a lower voltage and achieve solar-driven water electrolysis.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Derun Li et al.
Summary: This study presents a simple self-derivation method to fabricate a Fe-doped Ni3S2 electrode with impressive trifunctional catalytic activity for the oxygen evolution reaction, urea oxidation reaction, and hydrogen evolution reaction. The durability of this electrode is high, and in situ Raman spectra confirm that the incorporation of Fe inhibits S dissolution and facilitates catalyst reconstruction. It is also found that the doping of Fe optimizes the adsorption and accelerates the OER process. Furthermore, the two-electrode electrolyzer exhibits remarkable durability for both water and urea splitting, making it promising for industrial applications.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Yajun Song et al.
Summary: The study explores the real reaction sites in composite catalysts for electrocatalytic reactions and finds that the combination of non-UOR-active nano MnOx with hierarchical NiS2 achieves efficient urea electrocatalytic oxidation reaction (UOR). The results demonstrate that UOR takes place at the Mn sites instead of Ni sites, with Ni acting as an electron pump. This provides a new idea for the design of highly efficient catalysts for small molecular electrocatalysis.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Haozhe Zhang et al.
Summary: This study demonstrates the selective H3O+ intercalation in a neutral ZnCl2 electrolyte for water-proton co-intercalated alpha-MoO3 (WP-MoO3), which shows significantly enhanced specific capacity, rate capability, and cycling stability compared to the Zn2+ intercalation mechanism. This work highlights the possibility of modulating electrochemical intercalating ions through interlayer engineering to construct high-rate and long-life electrodes for aqueous batteries.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Wei Chen et al.
Summary: This study delves into the crucial role of nitrogenous nucleophile electrooxidation reaction (NOR) in the degradation and transformation of available nitrogen, particularly focusing on the transformation mechanism mediated by the beta-Ni(OH)(2) electrode. The study proposes the role of proton-coupled electron transfer (PCET) in bridging the electrocatalytic dehydrogenation and spontaneous nucleophile dehydrogenative oxidation reaction, with a specific focus on the urea oxidation reaction (UOR). Through both operando tracing and theoretical calculations, a mechanism for UOR involving intramolecular coupling of the N-N bond, accompanied by PCET, hydration, and rearrangement processes, is proposed to achieve high performance and approximately 100% N-2 selectivity. These findings shed light on the evolution of nitrogenous molecules during NOR, as well as fundamental aspects of electrocatalysis involving nitrogen-containing species.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Liping Wang et al.
Summary: A tungsten-doped nickel catalyst (Ni-WOx) was developed with superior activity towards the urea oxidation reaction, accelerating the reaction kinetics and increasing the turnover frequency. Experimental results demonstrated that tungsten doping led to the formation of Ni3+ sites with superior activity, facilitating the catalytic reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Huachuan Sun et al.
Summary: In this study, ultrathin rhodium-doped nickel-iron layered double hydroxide nanosheets were successfully synthesized, demonstrating excellent hydrogen evolution and oxygen evolution performance for advanced overall water splitting. The impressive mass activity in urea electro-oxidation reaction indicates great potential for overcoming the sluggish oxygen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Qianqian Zhao et al.
Summary: By synthesizing rod-like Ni3S2/NiS heterojunctions on nickel foam via sulfurization and Mo leaching, a bifunctional catalyst with excellent performance for urea oxidation and hydrogen evolution reactions was successfully prepared. The catalyst exhibited outstanding bifunctionality with 1.273 V for UOR and -0.146 V for HER at 10 mA cm(-2), outperforming most advanced urea electrolyzers.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Haiqing Wang et al.
Summary: This study presents a multi-interface engineering strategy to achieve a delicate balance in the kinetics of alkaline hydrogen evolution reaction (HER). The graphene cross-linked three-phase nickel sulfide foam exhibits superior catalytic activity in alkaline electrolyte and is better than most of the recently reported metal sulfides catalysts. Density functional theory (DFT) calculations confirm the favorable hydrogen adsorption and metallic nature of the electrocatalyst due to the interfaces between nickel sulfides and cross-linked graphene.
Article
Chemistry, Physical
Jiayi Qin et al.
Summary: A new hybrid electrocatalyst, 2H-MoS2/N-doped mesoporous graphene, rich in interfacial Mo-pyridinic N coordination, has been developed for efficient hydrogen evolution reaction (HER) in acidic, alkaline, and phosphate buffered solutions. The optimized hybrid catalyst shows outstanding HER activity with overpotentials of 110, 145, and 142 mV at 10 mA cm(-2), outperforming most previously reported MoS2-based catalysts. Theoretical and experimental results suggest that the Mo-pyridinic N coordination significantly enhances the intrinsic catalytic activity for the pH-universal HER process.
Article
Chemistry, Physical
Rongwei Meng et al.
Summary: A self-powered energy conversion device is crucial for exploring deep-sea extreme environments. Fe-N-G/CNT catalyst synthesized by microwave heating method shows outstanding oxygen reduction reaction performance in lean-oxygen seawater, suggesting a critical role for oxygenophilic catalyst for SWBs in such conditions.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
HuangJingWei Li et al.
Summary: By constructing Ru-O-Mo sites, researchers have successfully enhanced the H2O adsorption capacity of Ru/MoO2 catalysts, leading to significantly improved performance in alkaline media HER with a lower overpotential than previous catalysts, demonstrating stability over a 40-hour period. These results offer a new pathway for designing efficient and stable catalysts.
Article
Chemistry, Multidisciplinary
Hao Jiang et al.
Summary: By synthesizing oxygen-incorporated nickel molybdenum phosphide nanotube arrays, this study successfully developed self-supporting O-NiMoP/NF electrodes with highly efficient bifunctional catalytic activity towards HER and UOR.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jin Wang et al.
Summary: The Mo-NiPx/NiSy electrode exhibits low overpotentials and high activity in both hydrogen evolution and oxygen evolution reactions, demonstrating remarkable full water splitting performance comparable to commercial electrolysis.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Zi-You Yu et al.
Summary: The hydrogen economy has emerged as a promising alternative to the current hydrocarbon economy, involving the use of renewable energy to split water into hydrogen and oxygen for further utilization as clean fuel. Among various water electrolysis technologies, alkaline water splitting has been commercialized for over 100 years and is considered the most mature and economic option. Advanced nonprecious metal electrocatalysts have shown potential for improving the efficiency and stability of alkaline water splitting processes, with a focus on catalyst synthesis and performance improvement.
ADVANCED MATERIALS
(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
Chemistry, Multidisciplinary
Cejun Hu et al.
Summary: In this study, label-free surface-enhanced Raman spectroscopy was used to monitor the oxygen evolution reaction process on Ni3FeOx nanoparticles, revealing that Fe atoms are responsible for the initial OH- to O-O- oxidation, and the O-O- species undergo further oxidation between neighboring Fe and Ni sites.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Engineering, Environmental
Haoran Song et al.
Summary: Cation and anion codoped Co-B-Ni3S4 catalyst with dual active sites synergistically optimizes the adsorption energies for Hads and OHads, leading to superior performance in alkaline hydrogen evolution reaction. This work provides a pathway for kinetic-oriented design of alkaline HER at the atomic level.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Electrochemistry
Kun Song et al.
Summary: The study focuses on improving the electrical conductivity of Ni(OH)(2) and providing effective active sites through the design of Ni(OH)(2)/NiS composites, resulting in excellent electrochemical performance of supercapacitors.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Kai Zhang et al.
Summary: A research study presented a facile strategy for the controllable fabrication of the bimetallic active Co2Mo3O8 electrocatalyst for alkaline urea splitting. The synergistic effect of the Co-Mo dual sites was confirmed, and theoretical calculations revealed key features determining high reactivity for urea oxidation.
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.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Chao Wang et al.
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Nanoscience & Nanotechnology
Ping Li et al.
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Yuanmiao Sun et al.
ADVANCED MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Xiong Liu et al.
ADVANCED MATERIALS
(2020)
Article
Multidisciplinary Sciences
Yu Duan et al.
NATURE COMMUNICATIONS
(2020)
Review
Chemistry, Multidisciplinary
Peng Yu et al.
Article
Chemistry, Multidisciplinary
Seunghwa Lee et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2019)
Article
Chemistry, Physical
Yunqie Deng et al.
Article
Chemistry, Multidisciplinary
Li An et al.
ADVANCED FUNCTIONAL MATERIALS
(2019)
Article
Electrochemistry
Guo Chen et al.
ELECTROCHIMICA ACTA
(2018)
Article
Chemistry, Multidisciplinary
Zi-You Yu et al.
ENERGY & ENVIRONMENTAL SCIENCE
(2018)
Article
Chemistry, Multidisciplinary
Xin-Yao Yu et al.
ADVANCED MATERIALS
(2016)
Article
Chemistry, Multidisciplinary
Lihui Yuwen et al.
