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Structure deformation of Ni-Fe-Se enables efficient oxygen evolution via RE atoms doping

Rare Metals 2025年第1期44卷 336-348页

作者： Hong-Rui Zhao Cheng-Zong Yuan Cong-Hui Li Wen-Kai Zhao Fu-Ling Wu Lei Xin Hong Yin Shu-Feng Ye Xiao-Meng Zhang Yun-Fa Chen Jiangxi Province Research Institute of Rare Earths Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou341119China School of Rare Earths University of Science and Technology of ChinaHefei230026China Key Laboratory of Hunan Province for Advanced Carbon-Based Functional Materials School of Chemistry and Chemical EngineeringHunan Institute of Science and TechnologyYueyang414006China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing100190China

The development of cost-effective and highly stable electrocatalysts for oxygen evolution reactions holds paramount importance in practical hydrogen ***,we present a novel self-supported electrode comprising Ce-doped Ni-Fe-Se nanosheets grown on carbon cloth(Ni-Fe-Ce-Se/CC).This electrode was synthesized through a selenylation process,utilizing Ni-Fe-Ce-layered double hydroxide/carbon cloth(Ni-Fe-Ce LDH/CC)as the ***,Ni-Fe-Ce-Se/CC electrode demonstrates remarkable performance,requiring a low overpotential of 300 mV to attain a current density of 100 mA·cm^(-2)under harsh alkaline ***,the electrode exhibits exceptional stability during continuous operation for 100 *** into the underlying mechanisms was gained through a combination of experimental results and density functional theory *** findings reveal that Ce doping induces crystal structure deformation in Ni-Fe-Se and enhances electron enrichment around Ni *** structural modification optimizes the adsorption energy of oxygen-based intermediates on the Ni-Fe-Se *** work offers a valuable strategy for regulating the electron transfer and adsorption capabilities of transition metal selenide electrocatalysts through RE atoms doping,opening new avenues for enhanced electrocatalytic performance.

关键词： Ce doping Structure deformation Ni-Fe-Se Electron transfer oxygen evolution

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Highly Active oxygen evolution Integrating with Highly Selective CO_(2)-to-CO Reduction

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Nano-Micro Letters 2025年第8期17卷 189-201页

作者： Chaowei Wang Laihong Geng Yingpu Bi State Key Laboratory for Oxo Synthesis and Selective Oxidation National Engineering Research Center for Fine Petrochemical IntermediatesLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China Gansu Research Institute of Chemical Industry Co. LtdLanzhou 730000People’s Republic of China

Artificial carbon fixation is a promising pathway for achieving the carbon cycle and environment ***,the sluggish kinetics of oxygen evolution reaction(OER)and poor selectivity of CO_(2) reduction seriously limited the overall conversion efficiencies of solar energy to chemical ***,we demonstrated a facile and feasible strategy to rationally regulate the coordination environment and electronic structure of surface-active sites on both photoanode and *** specifically,the defect engineering has been employed to reduce the coordination number of ultrathin FeNi catalysts decorated on BiVO4 photoanodes,resulting in one of the highest OER activities of 6.51 mA cm^(−2)(1.23 VRHE,AM 1.5G).Additionally,single-atom cobalt(II)phthalocyanine anchoring on the N-rich carbon substrates to increase Co–N coordination number remarkably promotes CO_(2) adsorption and activation for high selective CO *** integration achieved a record activity of 109.4μmol cm^(−2) h−1 for CO production with a faradaic efficiency of>90%,and an outstanding solar conversion efficiency of 5.41%has been achieved by further integrating a photovoltaic utilizing the sunlight(>500 nm).

关键词： Photosynthesis oxygen evolution CO_(2)reduction Photoanode Single-atom Co-N5

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Electrocatalytic properties of ultrathin FeSe2/Ni0.85Se heterostructure hollow nanobelts for oxygen evolution in alkaline water and simulated seawater

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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 2025年 97卷 632-639页

作者： Jiang, Wenyue Zhao, Bingxin Li, Ziting Zhou, Peng Chen, Xiaoshuang Wang, Jinping Yang, Rui Zuo, Chunling Qiqihar Univ Coll Chem & Chem Engn Qiqihar 161006 Peoples R China Qiqihar Univ Heilongjiang Prov Key Lab Surface Act Agent & Auxi Qiqihar 161006 Peoples R China

Research into cost-effective electrocatalysts for alkaline water and simulated seawater oxidation is paramount for advancing the conversion and storage of renewable energy. In this study, a FeSe2/Ni0.85Se catalyst with the hollow and ultrathin nanobelts structure is synthesized. The distinctive structure characteristics of FeSe2/ Ni0.85Se heterojunction nanobelts confer exceptional oxygen evolution reaction (OER) properties in diverse electrolytes, including alkaline 1 M KOH and simulated seawater (1 M KOH + 0.5 M NaCl) solutions. The FeSe2/ Ni0.85Se catalyst presents the low overpotentials of 259 and 267 mV at a current density of 10 mA cm- 2, along with the Tafel slopes of 33.7 and 65.5 mV dec- 1 in two solutions, respectively. Additionally, the FeSe2/Ni0.85Se catalyst also demonstrates good stability. This exploration introduces a promising strategy for the development of high-performance electrocatalysts in the realm of green energy, marking the significant progress towards sustainable energy solutions.

关键词： FeSe 2 Ni 0.85 Se Heterostructure Hollow nanobelts oxygen evolution

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Ultrafine NiCo2S4 Nanosheets for Bifunctional Catalysis of oxygen Reduction and oxygen evolution

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ACS APPLIED NANO MATERIALS 2025年第14期8卷 7049-7060页

作者： Yao, Yifan Fu, Lixiang Wei, Weifeng Wang, Houyu Liu, Zhiqiang Jin, Yu Ma, Jingling Henan Univ Sci & Technol Sch Mat Sci & Engn Luoyang 471000 Henan Peoples R China Pingdingshan Univ Sch Chem & Environm Engn Pingdingshan 467000 Peoples R China Prov & Ministerial Coconstruct Collaborat Innovat Luoyang 471023 Peoples R China Pingdingshan Univ Yaoshan Lab Pingdingshan 467000 Peoples R China

Developing transition-metal sulfides with optimized surface structures shows great potential for boosting both oxygen reduction (ORR) and oxygen evolution (OER) reactions but remains challenging due to the lack of effective synthesis strategies. This limitation results in a suboptimal performance for most reported transition-metal sulfide catalysts. Herein, NiCo2S4 ultrafine nanosheets (NCS-SP) were obtained through conducting vulcanization treatment over nickel-cobalt hydroxide nanosheets (NiCo-OH) prepared in advance via a clean solvothermal synthesis, during which sulfur powder was employed as the sulfur source. NCS-SP integrates multiple catalytic advantages simultaneously, including the morphology structure of ultrafine nanosheets, excellent hydrophilia, abundant oxygen vacancies, and stable spinel structure, endowing NCS-SP to be an excellent bifunctional catalyst for ORR and the OER, with a smaller potential difference (Delta E) than Pt/C + RuO2. The work may not only highlight the significance of multistrategy synergy on improving catalytic performance but also pave the way for developing cost-effective and efficient bifunctional catalysts.

关键词： NiCo-OH NiCo2S4 nanosheet oxygenreduction oxygen evolution

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Cobalt-Based Noble-Metal-Free Electrocatalysts for Acidic oxygen evolution Reaction Toward Practical Proton Exchange Membrane Water Electrolysis

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CHEMCATCHEM 2025年第9期17卷

作者： Ding, Ruiqiang Xia, Bao Yu You, Bo Jiangsu Ocean Univ Sch Sci Lianyungang 550025 Jiangsu Peoples R China Huazhong Univ Sci & Technol Hubei Key Lab Mat Chem & Serv Failure Key Lab Mat Chem Energy Convers & Storage Sch Chem & Chem EngnMinist Educ Wuhan 430074 Hubei Peoples R China Sungkyunkwan Univ SKKU Ctr Next Generat Energy Mat 2066 Seobu Ro Suwon 16419 Gyeonggi Do South Korea Sungkyunkwan Univ SKKU Sch Chem Engn 2066 Seobu Ro Suwon 16419 Gyeonggi Do South Korea

Proton exchange membrane water electrolyzer (PEMWE) is one of the promising techniques to produce high-purity and green hydrogen when powered by sustainable electricity. Its large-scale implementation is currently limited by the limited reserve and high cost of noble metal Ir/Ru-based electrocatalysts for the anodic oxygen evolution reaction (OER) in acidic conditions. It is therefore highly desirable to develop highly active, durable, and nonprecious metals like cobalt-based acidic OER electrocatalysts for practical PEMWE. In this Concept, a recent achievement in developing cobalt-based noble-metal-free electrocatalysts for acidic OER in PEMWE is highlighted and future opportunities are discussed. We begin with a brief introduction of three typical OER mechanisms including the adsorbate evolution mechanism (AEM), lattice-oxygen-mediated mechanism (LOM), and oxide path mechanism (OPM), and then discuss the thermodynamic stability region of cobalt species under different pH and potential conditions by means of the corresponding Pourbaix diagram. Subsequently, several representative cobalt-based nonprecious electrocatalysts are reviewed, with emphasis on their rational design, structure-activity/stability correlation, and performance in practical PEMWE. Remarks on the challenges and perspectives in this field are also provided finally.

关键词： Cobalt Electrocatalysis oxygen evolution Proton exchange membrane Water splitting

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Progress in Perovskite Oxide Electrocatalysts for Efficient Hydrogen and oxygen evolution Reactions

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JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS 2025年 1-30页

作者： Kumar, Rohit Mehta, Samriti Thakur, Rajni Kumar, Sahil Kainthla, Itika Shandilya, Mamta Shoolini Univ Sch Phys & Mat Sci Bajhol 173229 India

The rising global energy demand and environmental concerns necessitate the transition from fossil fuels to sustainable energy solutions. Hydrogen (H2), as a clean and efficient energy carrier, has emerged as a promising alternative due to its high gravimetric energy density and environmental compatibility. Among various hydrogen production methods, water electrolysis is considered the most sustainable, involving the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In this review, we focus on the application of perovskite oxide materials (ABO3), which exhibit remarkable catalytic activity, stability, and tunability for electrochemical water splitting. We systematically discuss various synthesis approaches, including solid-state, sol-gel, hydrothermal, co-precipitation, and electrospinning techniques, highlighting their influence on catalyst performance. Furthermore, we examine recent advancements in lanthanum, strontium, barium, and other transition-metal-based perovskite oxides for HER and OER, explaining their, electronic structure modifications, and synergistic effects. The incorporation of perovskite oxides with carbon-based materials and emerging nano-structuring strategies is also reviewed to enhance catalytic efficiency. Finally, we outline the existing challenges and future perspectives in the rational design of perovskite oxide electrocatalysts, aiming to accelerate the development of cost-effective and high-performance materials for large-scale hydrogen production.

关键词： Perovskite oxide Electrocatalysts Hydrogen evolution oxygen evolution

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Stabilization of High-Valent Molecular Cobalt Sites through Oxidized Phosphorus in Reduced Graphene Oxide for Enhanced oxygen evolution Catalysis

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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 2025年第4期64卷 e202416274页

作者： Yang, Jiahui Dai, Guoliang Song, Wenjuan Win, Poe Ei Phyu Wang, Jiong Wang, Xin Soochow Univ Coll Chem Chem Engn & Mat Sci Innovat Ctr Chem Sci Suzhou 215006 Jiangsu Peoples R China Soochow Univ Jiangsu Key Lab Adv Negat Carbon Technol Suzhou 215123 Jiangsu Peoples R China Suzhou Univ Sci & Technol Sch Chem & Life Sci Suzhou 215009 Jiangsu Peoples R China City Univ Hong Kong Dept Chem Hong Kong 999077 Peoples R China

Heterogeneous molecular cobalt (Co) sites represent one type of classical catalytic sites for electrochemical oxygen evolution reaction (OER) in alkaline solutions. There are dynamic equilibriums between Co2+, Co3+ and Co4+ states coupling with OH-/H+ interaction before and during the OER event. Since the emergence of Co2+ sites is detrimental to the OER cycle, the stabilization of high-valent Co sites to shift away from the equilibrium becomes critical and is proposed as a new strategy to enhance OER. Herein, phosphorus (P) atoms were doped into reduced graphene oxide to link molecular Co2+ acetylacetonate toward synthesizing a novel heterogeneous molecular catalyst. By increasing the oxidation states of P heteroatoms, the linked Co sites were spontaneously oxidized from 2+ to 3+ states in a KOH solution through OH- ions coupling at an open circuit condition. With excluding the Co2+ sites, the as-derived Co sites with 3+ initial states exhibited intrinsically high OER activity, validating the effectiveness of the strategy of stabilizing high valence Co sites.

关键词： Transition metal ion redox proton-coupled electron transfer molecular electrocatalysis oxygen evolution alkaline water electrolysis

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Cucurbit[n]uril-Derived Electrocatalysts for oxygen evolution, oxygen Reduction, and Hydrogen evolution Reactions

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ACS APPLIED MATERIALS & INTERFACES 2025年第4期17卷 5648-5670页

作者： Jiang, Nan Cao, Yirong Cong, Hang Ge, Qingmei Zhao, Wenfeng You, Bo Guizhou Univ Dept Chem & Chem Engn Guiyang 550025 Guizhou Peoples R China Huazhong Univ Sci & Technol HUST Sch Chem & Chem Engn Hubei Key Lab Mat Chem & Serv Failure Key Lab Mat Chem Energy Convers & StorageMinist E Wuhan 430074 Hubei Peoples R China

Various sustainable energy conversion techniques like water electrolyzers, fuel cells, and metal-air battery devices are promising to alleviate the issues in fossil fuel consumption. However, their broad employment has been mainly inhibited by the lack of advanced electrocatalysts to accelerate the sluggish kinetics of the three involved half-reactions including oxygen evolution reaction (OER), oxygen reduction reaction (ORR), and hydrogen evolution reaction (HER). Recent advances have witnessed the cucurbit[n]uril (CB[n])-directed strategy as a prominent tool to develop high performance electrocatalysts with either OER, ORR, or HER activities. In this review, the recent progress on CB[n]-derived electrocatalysts ranging from molecular complexes to heterogeneous nanostructures and single-atoms for the three half-reactions are reviewed, and future opportunities are discussed. A concise introduction to the fundamentals of CB[n]s regarding their synthesis, structure, and chemistry is given first. Subsequently, the systematic summary of CB[n]-derived electrocatalysts and their performance for the OER/ORR/HER are discussed in detail, with a specific emphasis on correlating their structure and activities by combining diverse physiochemical characterizations, electrochemical experiments, and theory simulations. Finally, a brief conclusion and perspective for future opportunities regarding CB[n]-derived electrocatalysts for many other electrocatalytic applications are proposed.

关键词： cucurbit[n]urils electrocatalysis oxygen evolution oxygen reduction hydrogenevolution

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CeO2-Accelerated Surface Reconstruction of CoSe2 Nanoneedle Forms Active CeO2@CoOOH Interface to Boost oxygen evolution Reaction for Water Splitting

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ADVANCED ENERGY MATERIALS 2025年第4期15卷

作者： Guo, Quanxin Li, Yu Xu, Zhengrong Liu, Rui Tongji Univ Sch Mat Sci & Engn Minist Educ Key Lab Adv Civil Engn Mat Shanghai 201804 Peoples R China

Interface engineering is an efficient strategy to create high-performance electrocatalysts for water splitting. In the present work, CeO2@CoSe2 nanoneedle on carbon cloth (CeO2@CoSe2/CC) demonstrates high efficiency for oxygen evolution reaction (OER) and water splitting. CeO2 with abundant O vacancies facilitates the adsorption of OH- and boosts the reconstruction of CoSe2 into CoOOH at lower potentials. The in situ generated active CeO2@CoOOH heterointerface upshifts the d-band center of Co site, thereby decreasing the free energy of rate-determining step (RDS) (*O to *OOH) during the OER process. It delivers a low OER overpotential of 245 mV at 10 mA cm(-2). CeO2@CoSe2/CC is also found to be active for hydrogen evolution reaction (HER, 138 mV overpotential at 10 mA cm(-2)), profiting from CeO2-facilitated *H2O dissociation and *H adsorption on CoSe2. The overall water splitting is achieved over the CeO2@CoSe2/CC bifunctional electrode with a low electrolysis voltage of 1.54 V at 10 mA cm(-2). This work offers valuable insights into CeO2-assisted surface reconstruction as well as provides water electrolysis catalysts through interface engineering.

关键词： CeO2@CoSe2 CoOOH oxygen evolution reconstruction water splitting

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Synergistic Surface Reconstruction and Interface Engineering in Bimetallic Selenides: Advancing Renewable Energy Storage and oxygen evolution

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ACS APPLIED MATERIALS & INTERFACES 2025年第16期17卷 23892-23910页

作者： Afshan, Mohd Das, Subhabrata Rani, Daya Sharangi, Soumyadip Harini, H. Pahuja, Mansi Siddiqui, Shumile Ahmed Rani, Seema Chaudhary, Nikita Ghosh, Kaushik Inst Nano Sci & Technol Mohali 140306 India

Designing a bimetallic selenide-based heterostructure that possesses high catalytic efficiency, high capacity, and rate capability remains challenging due to constraints imposed by slow reaction kinetics, inadequate electrode utilization, and significant volume deformation. In this study, we successfully engineer a heterostructure comprising carbon nanotubes intertwined with sea urchin-like Bi2Se3@NiSe2 nanostructures having high electronic conductivity, high specific capacity, sufficiently exposed active sites, and favorable charge carrier migration. The interface engineering of the multilevel Bi2Se3@NiSe2 nanostructure on the carbon nanotube (CNT) framework synergistically reduces energetic barriers and accelerates oxygen evolution kinetics as well as promotes faster Faradaic reactions to enhance charge storage. As a consequence, the as-designed flexible supercapacitor device (Bi2Se3@NiSe2-CNT/CTs//AC-CNT/CTs) attains a peak energy density of 75.93 Wh kg-1 and a maximum power density of 15.12 kW kg-1, demonstrating remarkable durability (94.35% capacitance retention) after 40k cycles. The higher density of states near the Fermi level in the Bi2Se3@NiSe2 hybrid enhances electronic conductivity and charge carrier mobility, coupled with efficient OH- adsorption (Delta E a = -4.352 eV@Bi site, Delta E a = -4.932 eV@Ni site), thereby trapping more electrolyte ions and promoting faster redox reactions. Additionally, the induced electronic interactions between core selenides and surface-generated thin layers of hydroxide/oxide synergistically accelerate the reaction kinetics in terms of a lower overpotential (199 mV@20 mA cm-2), a lower Tafel slope (59.2 mV dec-1), and a higher electrochemical surface area (1460.0 cm2) toward oxygen evolution. The proposed study on the construction of dual redox-active site heterostructures is expected to create avenues for advancing renewable energy systems.

关键词： interface engineering bimetallic selenides flexible hybrid supercapacitors surface-generated oxides/hydroxides oxygen evolution

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