IF 12.1 2区材料科学

Small Pub Date : 2026-05-08 DOI: 10.1002/smll.202514883

Qingnian Li, Jing Wang, Jie Miao, Dexian Liu, Wanying Xiong, Bo Xiao, Wenhu Zhou

{"title":"A Monocyte-Targeted Nanoplatform for Phagocytosis Activation and Ferroptosis Inhibition in Intracerebral Hemorrhage.","authors":"Qingnian Li, Jing Wang, Jie Miao, Dexian Liu, Wanying Xiong, Bo Xiao, Wenhu Zhou","doi":"10.1002/smll.202514883","DOIUrl":"https://doi.org/10.1002/smll.202514883","url":null,"abstract":"Intracerebral hemorrhage (ICH) is a highly fatal subtype of stroke characterized by vascular rupture and hematoma formation, leading to both primary mechanical damage and secondary neuroinflammatory injury. While both microglia and infiltrating monocytes contribute to hematoma clearance, their distinct roles and therapeutic potential remain unclear. Moreover, the erythrophagocytic process is tightly constrained by the CD47-SIRPα signaling axis, which impairs effective resolution. Through integrated multi-omics analysis, single-cell RNA sequencing, and cross-species validation, we identified that monocyte-derived macrophages (MDMs)-not resident microglia-are the predominant phagocytes in the ICH microenvironment, exhibiting superior hematoma clearance capacity. However, excessive red blood cell engulfment induces ferroptosis in these cells, thereby disrupting tissue repair. To address these challenges, we engineered a multifunctional nanoparticle system, mPDA@DFO-CpG-N1, incorporating: (1) a high-affinity monocyte-targeting aptamer (N1) for selective delivery; (2) a TLR9 agonist (CpG) that bypasses CD47-mediated inhibition by reprogramming monocytes energy metabolism to enhance phagocytic function; and (3) the iron chelator deferoxamine (DFO) to mitigate ferroptosis. The system utilizes endogenous monocyte chemotaxis for hematoma targeting and pH-sensitive release for spatiotemporal precision. In vivo studies in a murine ICH model demonstrated that mPDA@DFO-CpG-N1 achieved a 3.2-fold increase in lesion site accumulation, markedly improved hematoma clearance, suppressed monocytes ferroptosis, and significantly restored neurological function. This work reveals the pivotal role of MDMs in ICH resolution and presents a closed-loop, multimodal therapeutic strategy integrating targeted delivery, immune modulation, and cell fate regulation for effective treatment of cerebral hemorrhage.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e14883"},"PeriodicalIF":12.1,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strong Interfacial Electronic Coupling in Ni₃Mo₃C@MoO₂ for Durable Oxygen Evolution Reaction. Ni3Mo3C@MoO2中持久析氧反应的强界面电子耦合。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-08 DOI: 10.1002/smll.73715

Yu Zhang, Jia Ren, Zhiming Li, Jiayang Shi, Chang Liu, Miaolun Jiao, Mingyue Wang, Yongge Wei, Chenliang Ye

{"title":"Strong Interfacial Electronic Coupling in Ni3Mo3C@MoO2 for Durable Oxygen Evolution Reaction.","authors":"Yu Zhang, Jia Ren, Zhiming Li, Jiayang Shi, Chang Liu, Miaolun Jiao, Mingyue Wang, Yongge Wei, Chenliang Ye","doi":"10.1002/smll.73715","DOIUrl":"https://doi.org/10.1002/smll.73715","url":null,"abstract":"The oxygen evolution reaction (OER) serves as a critical electrode process for electrochemical hydrogen production, yet it is hindered by its sluggish kinetics and poor stability of catalysts. Carbides anchored on highly electronegative oxide nanoparticles are attractive new catalytic materials for OER due to the unique carbide/oxide heterostructures. Herein, we report a strong carbide/oxide interfacial electronic coupling strategy to obtain high-performance OER catalysts of Ni3Mo3C anchored on MoO2 nanoparticles (Ni3Mo3C@MoO2-CN). Ni3Mo3C@MoO2-CN catalyst exhibits excellent OER performance with a low overpotential of 197 mV at 10 mA cm-2. Furthermore, a Pt/C || Ni3Mo3C@MoO2-CN electrolyzer achieves a low cell voltage of 1.92 V at 500 mA cm-2 with 2000 h of outstanding durability for overall water splitting. Our work reveals that carbide/oxide interfacial electronic coupling induces electron transfer from Ni3Mo3C to MoO2, which facilitates π* electron back-filling effect into the Ni─O*, resulting in the optimized adsorption of O*. Consequently, the key reaction step of OOH* formation in Ni3Mo3C@MoO2-CN becomes a spontaneous process, leading to a low energy barrier of the OER process and excellent catalytic performance. This study provides fundamental insights into modulating the catalytic performance by fabricating interfacial electronic coupling between carbides and highly electronegative oxide nanoparticles.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73715"},"PeriodicalIF":12.1,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Blue-Light-Free Orange-Red Organic Light-Emitting Diodes With Less Influence on Melatonin Secretion. 对褪黑激素分泌影响较小的无蓝光橙红色有机发光二极管。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-08 DOI: 10.1002/smll.73669

Yuan-Chang Kuo, Pin-Yu Chen, Yun-Tin Huang, Cheng-En Chiang, Hsiang-Wei Hsu, Wen-Shuo Liang, Chun-Yao Huang, Yiing-Mei Liou, Wei-Chung Mao, Shun-Jen Cheng, Hsiao-Wen Zan, Sheng-Fu Horng, Hsin-Fei Meng, Yu-Chiang Chao

{"title":"Blue-Light-Free Orange-Red Organic Light-Emitting Diodes With Less Influence on Melatonin Secretion.","authors":"Yuan-Chang Kuo, Pin-Yu Chen, Yun-Tin Huang, Cheng-En Chiang, Hsiang-Wei Hsu, Wen-Shuo Liang, Chun-Yao Huang, Yiing-Mei Liou, Wei-Chung Mao, Shun-Jen Cheng, Hsiao-Wen Zan, Sheng-Fu Horng, Hsin-Fei Meng, Yu-Chiang Chao","doi":"10.1002/smll.73669","DOIUrl":"https://doi.org/10.1002/smll.73669","url":null,"abstract":"The night lighting in the hospitals is now a major cause of sleep disorder for the patients. The predominant light-emitting diode (LED) contains a sharp blue peak, which is known to reduce the natural melatonin secretion in the brain. Melatonin level is crucial to the biological clock. Organic LED (OLED) has a blue-free and broad spectrum. The conventional vacuum process is however too expensive. Here the lifetime of solution-processed OLED is significantly improved by the selection of multiple host materials in the emission layer, the removal of the interfaces, and the prevention of the point defect over large areas. OLED panels with a 3 cm × 4 cm emission area with continuously tuned color are made over 20 cm by 29 cm glass substrate by cylindrical blade coating. The lifetime is raised to 820 h. The orange-red OLED panels are applied in a sleep clinical study with 24 cases. White LEDs with and without color filters were also studied for comparison. At the same illumination of 30 lux, OLED is shown to have less effect on the melatonin level than white LED with or without color filter. This implies that OLEDs can help alleviate sleep disorders.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73669"},"PeriodicalIF":12.1,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interfacial Charge Redistribution-Driven Two-Electron Conversion in Ni_0.85Se@Mo-Doped NiCo-LDH for High-Power Electrochemical Energy Storage. Ni0.85Se@Mo-Doped NiCo-LDH中界面电荷再分配驱动的双电子转换用于大功率电化学储能。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-08 DOI: 10.1002/smll.73700

Zhikun Li, Yingjie Ding, Tianzhu Yu, Zhaoxiong Yan, Jiaqi Wu, Qin Li, Weijie Li, Zhihua Xu

{"title":"Interfacial Charge Redistribution-Driven Two-Electron Conversion in Ni0.85Se@Mo-Doped NiCo-LDH for High-Power Electrochemical Energy Storage.","authors":"Zhikun Li, Yingjie Ding, Tianzhu Yu, Zhaoxiong Yan, Jiaqi Wu, Qin Li, Weijie Li, Zhihua Xu","doi":"10.1002/smll.73700","DOIUrl":"https://doi.org/10.1002/smll.73700","url":null,"abstract":"Rational structural engineering and electronic modulation are vital for advancing high-performance electrochemical energy storage. Herein, we construct a hierarchical Ni0.85Se@Mo-doped NiCo-LDH heterostructure (NS@MNC-LDH) directly on hydrophilic carbon cloth (HCC) to achieve uniform nucleation and strong interfacial coupling (NS@MNC-LDH/HCC). The conductive Ni0.85Se core provides fast electron transport and mechanical robustness, while the Mo-doped NiCo-LDH shell introduces abundant oxygen vacancies and optimized electronic states to enrich redox-active sites. Combined experiments and density functional theory calculations reveal pronounced interfacial charge redistribution that accelerates ion/electron transport and enables efficient multi-electron transfer. Distribution of relaxation times analysis and in situ Raman spectroscopy further verify rapid charge-transfer kinetics and highly reversible NiCo-LDH/Ni(Co)OOH/Ni(Co)O2 conversions. Benefiting from these synergistic effects, NS@MNC-LDH/HCC delivers an ultrahigh capacity of 540.8 mAh g-1 at 1 A g-1, approaching a two-electron transfer capacity, along with 81.8% retention at 32 A g-1. The assembled hybrid supercapacitor achieves an energy density of 128.5 Wh kg-1 at 750 W kg-1 and maintains 83.8% of its capacity after 10 000 cycles. This work demonstrates that interfacial electronic coupling combined with defect-regulated multi-electron transfer provides a powerful and generalizable design principle for next-generation high-power energy storage materials.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73700"},"PeriodicalIF":12.1,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reconfigurable Adaptive Synapse and Logic Device by Ambipolar Ferroelectric Semiconductor. 双极性铁电半导体的可重构自适应突触与逻辑器件。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-08 DOI: 10.1002/smll.202514124

Jaewook Yoo, Minah Park, Seokjin Oh, Soyeon Kim, Hongseung Lee, Sojin Jung, Seohyeon Park, Seongbin Lim, Jong Min Song, Ji Won Heo, Gyeong Deok Seo, Kiyoung Lee, Sangmoon Yoon, TaeWan Kim, Hagyoul Bae

{"title":"Reconfigurable Adaptive Synapse and Logic Device by Ambipolar Ferroelectric Semiconductor.","authors":"Jaewook Yoo, Minah Park, Seokjin Oh, Soyeon Kim, Hongseung Lee, Sojin Jung, Seohyeon Park, Seongbin Lim, Jong Min Song, Ji Won Heo, Gyeong Deok Seo, Kiyoung Lee, Sangmoon Yoon, TaeWan Kim, Hagyoul Bae","doi":"10.1002/smll.202514124","DOIUrl":"https://doi.org/10.1002/smll.202514124","url":null,"abstract":"Dynamic control in artificial intelligence hardware is increasingly emphasized for the co-integration of learning and computing. However, existing approaches to dynamic mode modulation often require impractical structures or parasitic external signals, which pose significant challenges for realistic implementation. This study presents an α-In2Se3 device with ambipolar transport behavior, achieved through surface charge transfer doping (SCTD). The p-type conduction arises from In2O3, which acts as the highest occupied molecular orbital (HOMO), and Se vacancies, which serve as acceptors. Adaptive synaptic and logic functions are enabled through the control of ferroelectric polarization. The excitatory/inhibitory synaptic mode reconfiguration was successfully realized at an ultralow energy consumption from approximately 200 aJ to 20 fJ. The reversible ferroelectric switching serves as the underlying mechanism for the tunability of the inverter trip point. This study is an effort to break away from dedicated stationary applications and move closer to a future prototype device than previous works in integrating neuromorphic computing and logical functionalities.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e14124"},"PeriodicalIF":12.1,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic Regulation of Excited-State Electrons Enables Sunlight-Driven C─Br Bond Activation Through In Situ Polymerized Polyoxometalate-Gold Nanocluster Assemblies. 激发态电子的协同调节使阳光驱动的C─Br键激活通过原位聚合多金属酸氧-金纳米团簇组装。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-08 DOI: 10.1002/smll.73713

Satya Ranjan Sahoo, Suman Handal, Sumit Saha, Dinesh Topwal, Prasenjit Mal, Nirmal Goswami

{"title":"Synergistic Regulation of Excited-State Electrons Enables Sunlight-Driven C─Br Bond Activation Through In Situ Polymerized Polyoxometalate-Gold Nanocluster Assemblies.","authors":"Satya Ranjan Sahoo, Suman Handal, Sumit Saha, Dinesh Topwal, Prasenjit Mal, Nirmal Goswami","doi":"10.1002/smll.73713","DOIUrl":"https://doi.org/10.1002/smll.73713","url":null,"abstract":"While gold nanoclusters (AuNCs) offer unique molecule-like properties and discrete energy levels, their potential in photocatalysis remains largely untapped due to inherent stability and recombination issues. Herein, we report a ternary gold superclusters (AuSCs) architecture, AuSCs@SiW9@PDA, that overcomes these limitations through cooperative regulation of excited-state electron dynamics. The composite is constructed via depletion-driven assembly of glutathione-protected AuNCs with a Keggin-type polyoxometalate, (Na10SiW9O34 or SiW9), followed by encapsulation within a polydopamine (PDA) network. In this system, SiW9 serves as an efficient electron sink, while PDA enhances solar light absorption, promotes interfacial charge transport, and suppresses recombination, collectively increasing the density of photogenerated electrons. As a result, AuSCs@SiW9@PDA enables efficient sunlight-driven activation of the thermodynamically robust C─Br bond in CBr4, affording (1,3,3,3-tetrabromopropyl)benzene from terminal aryl alkenes in yields up to 90%. The activity markedly exceeds that of the corresponding binary analogues (AuSCs@SiW9 and AuSCs@PDA) and their physical mixtures, highlighting the critical role of synergistic excited-state electron-transfer. Mechanistic investigations reveal accelerated electron transfer to CBr4 and suppressed charge recombination as key factors governing C─Br bond cleavage. Overall, this work establishes AuSCs as robust, sunlight-driven photocatalysts and demonstrates excited-state electron management as a strategy for sunlight-driven bond activation.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73713"},"PeriodicalIF":12.1,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-Scale Water Modulation for Regulating Water Reactivity and Suppressing Nanoscale Zero-Valent Iron (nZVI) Corrosion. 调节水反应活性和抑制纳米级零价铁（nZVI）腐蚀的多尺度水调制。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-08 DOI: 10.1002/smll.73729

Shuyan Zhang, Huiping Li, Hao Li, Rongbing Fu, Wei-Xian Zhang, Shaolin Li

{"title":"Multi-Scale Water Modulation for Regulating Water Reactivity and Suppressing Nanoscale Zero-Valent Iron (nZVI) Corrosion.","authors":"Shuyan Zhang, Huiping Li, Hao Li, Rongbing Fu, Wei-Xian Zhang, Shaolin Li","doi":"10.1002/smll.73729","DOIUrl":"https://doi.org/10.1002/smll.73729","url":null,"abstract":"Water is not a passive solvent but an actively tunable participant in aqueous-phase redox processes, whose reactivity can be regulated by modulating its molecular states and dynamics. Here, we introduce a multi-scale water modulation strategy using a hydrophilic polysaccharide network to reorganize the aqueous environment and suppress the corrosion of nanoscale zero-valent iron (nZVI). At the molecular scale, the polysaccharides tune free water (FW) into bound and intermediate water (BW/IW), which together account for ∼45% of total water. This water-state redistribution elevates the reaction barrier for H2O-Fe(0) interactions from 8.2 eV (FW) to 10.5 eV (BW), and the observed reaction rate constant (kobs) shows a strong linear dependence on the BW+IW fraction (R2 ≈ 0.99). At the nanoscale, the network imposes hydrophilic confinement (mesh size ≈ 1.1 nm) that restricts water access to reactive Fe(0) sites, causing a rapid attenuation of early-stage reactions (<12 days). At the macroscale, the modulated water forms a viscoelastic matrix (G' > G″) that retains in situ-generated H2 microdomains, creating interfacial shielding that suppresses prolonged reactions (>12 days). By linking water's molecular organization to macroscopic redox behavior, this work provides a framework for using the water modulation to stabilize corrosion-sensitive nanoparticles.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73729"},"PeriodicalIF":12.1,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two-Dimensional Molybdenum Telluride (MoTe₂): Synthetic Strategies, Physical Properties, and Future Perspectives. 二维碲化钼（MoTe2）：合成策略、物理性质和未来展望。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-08 DOI: 10.1002/smll.73709

Zikang Li, Xiukai Chen, Dehao Kong, Guodong Sun, Shuyan Tian, Yinuo Sun, Chengyue Xiong, Xiaoguo Song, Jicai Feng, Hong Bian

{"title":"Two-Dimensional Molybdenum Telluride (MoTe2): Synthetic Strategies, Physical Properties, and Future Perspectives.","authors":"Zikang Li, Xiukai Chen, Dehao Kong, Guodong Sun, Shuyan Tian, Yinuo Sun, Chengyue Xiong, Xiaoguo Song, Jicai Feng, Hong Bian","doi":"10.1002/smll.73709","DOIUrl":"https://doi.org/10.1002/smll.73709","url":null,"abstract":"Molybdenum ditelluride (MoTe2) has attracted extensive attention in the development of ultra-compact electronic and optoelectronic devices due to its compelling two-dimensional (2D) layered structure and unique physical properties that are absent in its bulk counterparts. This article reviews the properties, synthesis methods, and applications of MoTe2. The review briefly outlines the structure of MoTe2 and its typical characteristics, including phase transitions, optoelectronic properties, structural stability, ferromagnetism, and moiré properties. Various preparation methods for 2D MoTe2, such as exfoliation, phase engineering, deposition techniques, hydrothermal synthesis, and molecular beam epitaxy, are described in detail. Subsequently, the applications of MoTe2 in fields including catalysis, field-effect transistors, artificial synaptic devices, optoelectronic devices, and spintronic devices are introduced. Finally, perspectives on future research directions and accompanying challenges are presented. Achieving high-quality, wafer-scale 2D growth of MoTe2 is expected to make this material an ideal candidate for phase engineering and novel near-infrared photonics and optoelectronics.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73709"},"PeriodicalIF":12.1,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vacancy-Engineered Interfacial Electrons Modulation in NiCo Hydroxide/MoS₂ Heterostructures for Boosted OER Electrocatalysis. 氢氧化镍/二硫化钼异质结构中空位工程界面电子调制促进OER电催化。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-08 DOI: 10.1002/smll.73560

Ruiqian Zhang, Binbin Qian, Dantong Zhang, Ceneng Chen, Yong Luo, Ke Xu, Zhi Long, Amir Said, Jianfeng Jiang, Kunfeng Chen, Sridhar Komarneni, Chunlei Yang, Dongfeng Xue

{"title":"Vacancy-Engineered Interfacial Electrons Modulation in NiCo Hydroxide/MoS2 Heterostructures for Boosted OER Electrocatalysis.","authors":"Ruiqian Zhang, Binbin Qian, Dantong Zhang, Ceneng Chen, Yong Luo, Ke Xu, Zhi Long, Amir Said, Jianfeng Jiang, Kunfeng Chen, Sridhar Komarneni, Chunlei Yang, Dongfeng Xue","doi":"10.1002/smll.73560","DOIUrl":"https://doi.org/10.1002/smll.73560","url":null,"abstract":"Developing efficient and durable oxygen evolution reaction (OER) electrocatalysts is crucial for sustainable hydrogen production via water electrolysis. Herein, nickel-cobalt hydroxide/molybdenum disulfide heterostructures (NiCo/MoS2)with discriminatively engineered cationic (NiCo/MovacS2) and anionic (NiCo/MoSvac 2) vacancies for orchestrating electron transfer were constructed to clarify their distinct roles in regulating interfacial electronic properties and OER performance. Experimental and theoretical analyses demonstrate that Mo vacancies significantly enhance interfacial electron transfer. This facilitates the OER kinetics by modulating the adsorption energy of *O intermediate and thereby shifting the potential-determining step from the deprotonation step to the hydroxyl coupling step, which yields a low overpotential of 256 mV at 10 mA cm-2 and a small Tafel slope of 68.5 mV dec-1. In contrast, S vacancies promote electron delocalization within MoS2 but exhibit inferior catalytic enhancement. The Mo-vacancy-modified NiCo/MovacS2 electrode holds practical application potential in alkaline electrolyzers, achieving 1 A cm-2 at 2.11 V (60°C) and operating stably for over 300 h. This work highlights the pivotal importance of vacancy type in heterointerfacial design and provides a strategic direction for developing advanced electrocatalysts.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73560"},"PeriodicalIF":12.1,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrostatically Guided Covalent Architectures for Stable Hydrogen Evolution at Ampere-Level Current Densities in Acidic Media. 在酸性介质中安培级电流密度下稳定析氢的静电引导共价结构。

IF 12.1 2区材料科学

Small Pub Date : 2026-05-08 DOI: 10.1002/smll.73714

Qin Qi Zhan, Yi Liu, Meng Hui Qiu, Yan Hong Yin, Xian Bin Liu, Ting Liu, Ye Sheng Li, Zi Ping Wu, Hai Feng Wang, Xing Miao Zhou, Bao Yu Xia

{"title":"Electrostatically Guided Covalent Architectures for Stable Hydrogen Evolution at Ampere-Level Current Densities in Acidic Media.","authors":"Qin Qi Zhan, Yi Liu, Meng Hui Qiu, Yan Hong Yin, Xian Bin Liu, Ting Liu, Ye Sheng Li, Zi Ping Wu, Hai Feng Wang, Xing Miao Zhou, Bao Yu Xia","doi":"10.1002/smll.73714","DOIUrl":"https://doi.org/10.1002/smll.73714","url":null,"abstract":"Achieving stable operation at high current densities is a critical challenge for acidic water electrolysis, where intensified bubble evolution induces concentration polarization and mechanical stress that accelerate catalyst degradation. Here, we report Mo2C nanoclusters in situ anchored onto nitrogen-doped carbon nanotubes (NCNTs) via strong Mo─C and Mo─N covalent bonds. The covalent integration, achieved through electrostatically guided self-assembly followed by carbonization, yields a porous and conductive network that combines efficient charge transport with resistance to acidic corrosion. The resulting catalyst delivers overpotentials of 256 mV at 500 mA cm-2 and 396 mV at 1000 mA cm-2 in 0.5 m H2SO4, and operates stably at 865 mA cm-2 for over 240 h. In a proton exchange membrane water electrolyzer, it sustains overall water splitting at 1000 mA cm-2 with a cell voltage of 2.03 V for more than 150 h. This hierarchical covalent design enhances conductivity, durability, and bubble management, representing a scalable strategy for next-generation electrocatalysts capable of ampere-level operation in acidic media.","PeriodicalId":228,"journal":{"name":"Small","volume":" ","pages":"e73714"},"PeriodicalIF":12.1,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147831601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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