Advanced Powder Materials最新文献

Dense nano-tips homogenize lithium deposition 致密的纳米尖端使锂沉积均匀

Advanced Powder Materials

Pub Date : 2026-01-12 DOI: 10.1016/j.apmate.2026.100401

Hongqin Chen , Xinshuo Li , Min Ling , Xuehui Gao , Dian Zhao , Zhongwei Chen

Lithium metal batteries (LMBs) offer high energy density but suffer from dendrite growth and interfacial instability, hindering practical application. We present a novel strategy that repurposes the “tip effect” to achieve uniform lithium deposition and suppress dendrite formation. By designing a three-dimensional Cu/Fe₃O₄ Mott-Schottky heterojunction array with a high-density nano-tip structure, we homogenize the surface charge distribution, preventing current hotspots that induce dendrite growth. The Mott-Schottky heterojunction generates a robust built-in electric field that enriches Li⁺ concentration at the electrode surface, mitigates Li⁺ depletion, and homogenizes the electric field distribution. Simultaneously, the ferromagnetic Fe₃O₄ induces an internal magnetic fields, utilizing the magnetohydrodynamic effect, redirects Li⁺ trajectories away from surface protrusions, thereby suppressing dendritic nucleation. Experimental and computational analysis confirm that this beneficial tip effect and coupled dual-field mechanism can effectively promote uniform lithium deposition, achieving a plating and stripping Coulombic efficiency of 99.2%. Consequently, the symmetric cell achieves an ultralong cycle life of over 3000 h at 1 mA cm⁻² with an ultralow overpotential of 12 mV. When paired with a high-loading LiFePO₄ cathode (11.25 mg cm⁻²), the full cell maintains 95% of its initial capacity after 200 cycles, demonstrating exceptional rate capability and interfacial stability. For high-voltage cathode LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811), Li-Cu/Fe₃O₄||NCM811 cell achieves a capacity retention rate of 94.8% after 150 cycles at 2 C. This work provides an innovative solution for controlling lithium deposition, offering a promising strategy for high-performance LMBs.

锂金属电池（lmb）具有高能量密度，但存在枝晶生长和界面不稳定等问题，阻碍了其实际应用。我们提出了一种新的策略，重新利用“尖端效应”来实现均匀的锂沉积和抑制枝晶的形成。通过设计具有高密度纳米尖端结构的三维Cu/Fe3O4 Mott-Schottky异质结阵列，我们使表面电荷分布均匀化，防止了引起枝晶生长的电流热点。Mott-Schottky异质结产生了一个强大的内置电场，丰富了电极表面的Li+浓度，减轻了Li+的损耗，并使电场分布均匀化。同时，铁磁性Fe3O4诱导内部磁场，利用磁流体动力学效应，使Li+轨迹远离表面突起，从而抑制枝晶成核。实验和计算分析证实，这种有利的尖端效应和耦合双场机制可以有效地促进均匀的锂沉积，实现99.2%的镀剥库仑效率。因此，对称电池在1ma cm−2下实现了超过3000小时的超长循环寿命，超低过电位为12mv。当与高负载LiFePO4阴极（11.25 mg cm−2）配对时，整个电池在200次循环后保持95%的初始容量，表现出卓越的速率能力和界面稳定性。对于高压阴极LiNi0.8Co0.1Mn0.1O2 (NCM811)， Li-Cu/Fe3O4||NCM811电池在2℃下循环150次后的容量保持率达到94.8%。该研究为控制锂沉积提供了一种创新的解决方案，为高性能lmb提供了一种有前途的策略。

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引用次数: 0

Dual-functional Cr3+-doped InP quantum dots with pure blue emission and room-temperature ferromagnetism 具有纯蓝色发射和室温铁磁性的双功能Cr3+掺杂InP量子点

Advanced Powder Materials

Pub Date : 2026-01-08 DOI: 10.1016/j.apmate.2026.100393

Maoyuan Huang , Haiyang Li , Jie Zhao , Bo Tan , Shiliang Mei , Wanlu Zhang , Pengfei Tian , Ruiqian Guo

Indium phosphide (InP) quantum dots (QDs) have gained global research focus owing to their eco-friendly properties and outstanding optical characteristics. However, blue emission of InP QDs has made slow progress owing to surface defects and lattice mismatch between core and shell. Meanwhile, the ferromagnetism of traditional dilute magnetic semiconductors (DMSs) is limited by insufficient Curie temperature, failing to meet practical applications. Herein, we report Cr³⁺-doped InP/ZnS QDs with dual functions of pure blue emission and room-temperature ferromagnetism. By using hot injection method, Cr³⁺ ions are precisely embedded into the core-shell interface of QDs, effectively passivating the surface defects of the InP cores. This approach enables the fabrication of pure blue-emitting QDs with an emission of 471 nm, a photoluminescence quantum yield (PLQY) of 52%, and a full width at half maximum (FWHM) of 46 nm. Through the dominance of ferromagnetic superexchange interaction, synergizing with the intrinsic strong local magnetic moment of Cr³⁺ and quantum confinement effect, room-temperature ferromagnetism is achieved in InP-based QDs for the first time (Curie temperature above 350 K and maximum coercivity of 95.45 Oe). This work provides new materials for spintronic devices, and the Cr³⁺ doping strategy also offers a reference for the opto-magnetic regulation of III-V QDs.

磷化铟（InP）量子点（QDs）因其生态友好的特性和优异的光学特性而成为全球研究的热点。然而，由于表面缺陷和核壳之间的晶格不匹配，InP量子点的蓝色发射进展缓慢。同时，传统稀磁半导体（dms）的铁磁性受到居里温度不足的限制，无法满足实际应用。本文报道了具有纯蓝色发射和室温铁磁性双重功能的Cr3+掺杂InP/ZnS量子点。通过热注入的方法，将Cr3+离子精确嵌入到量子点的核壳界面，有效地钝化了InP核的表面缺陷。该方法可以制备出纯蓝色发射量子点，其发射波长为471nm，光致发光量子产率（PLQY）为52%，半峰全宽度（FWHM）为46nm。通过铁磁超交换相互作用的主导作用，协同Cr3+的本然强局域磁矩和量子约束效应，首次在inp基量子点中实现了室温铁磁性（居里温度高于350 K，最大矫顽力为95.45 Oe）。这项工作为自旋电子器件提供了新的材料，Cr3+掺杂策略也为III-V型量子点的光磁调节提供了参考。

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引用次数: 0

Enhancing C–C bond cleavage in ethylene glycol electrooxidation via d–p orbital hybridization at PtBi nanodendrites with ultrathin bimetallene subunits 利用超薄双甲基烯亚基在PtBi纳米枝上的d-p轨道杂化增强乙二醇电氧化过程中C-C键的裂解

Advanced Powder Materials

Pub Date : 2025-12-30 DOI: 10.1016/j.apmate.2025.100392

Yang Li , Bin Sun , Ying Li , Chong Zhang , Pu-Jun Jin , Xin Wang , Bao Yu Xia , Yu Chen , Xuan Ai

The large-scale implementation of direct ethylene glycol fuel cells (DEGFCs) relies on the design of catalysts that possess exceptional activity, durability, and efficient C–C bond breaking ability. However, Pt and Pd-based nanomaterials continue to face challenges of low selectivity and slow reaction kinetics in driving the complete oxidation of ethylene glycol to CO₂. In this work, a facile one-pot reduction method is reported for controllable synthesis of PtBi nanodendrites (PtBi-NDs) composed of ultrathin bimetallene subunits. In alkaline media, the composition optimized PtBi-NDs demonstrate outstanding activity and strong resistance to CO poisoning during the ethylene glycol oxidation reaction (EGOR). The PtBi-NDs show 5.8-fold higher mass activity, enhanced stability, and superior C1 selectivity relative to commercial Pt nanoparticles (Pt c-NCs). Most strikingly, PtBi-NDs deliver a higher power density (8.3 mW cm⁻²) than Pt c-NCs in DEGFCs. The theoretical analysis and experimental measurements explain that the introduction of Bi element into Pt induces d–p orbital hybridization and promotes electron transfer from Bi to Pt, thereby facilitating C–C bond cleavage and boosting EGOR kinetics. This work establishes an effective strategy for constructing Pt-based ultrathin bimetallenes and offers fundamental insights into boosting EGOR performance via d-p orbital hybridization.

直接乙二醇燃料电池（DEGFCs）的大规模应用依赖于催化剂的设计，这些催化剂具有卓越的活性、耐久性和高效的C-C键断裂能力。然而，铂和钯基纳米材料在驱动乙二醇完全氧化成二氧化碳方面仍然面临低选择性和慢反应动力学的挑战。本文报道了一种简便的一锅还原法制备由超薄双甲基烯亚基组成的PtBi纳米枝晶（PtBi- nds）。在碱性介质中，优化后的PtBi-NDs在乙二醇氧化反应（EGOR）中表现出优异的活性和较强的抗CO中毒能力。与商业Pt纳米粒子（Pt c-NCs）相比，PtBi-NDs具有5.8倍的质量活性、更高的稳定性和更好的C1选择性。最引人注目的是，在DEGFCs中，PtBi-NDs比Pt c-NCs提供更高的功率密度（8.3 mW cm - 2）。理论分析和实验测量解释了Bi元素在Pt中的引入诱导了d-p轨道杂化，促进了电子从Bi向Pt的转移，从而促进了C-C键的裂解，提高了EGOR动力学。这项工作建立了构建基于pt的超薄双金属烯的有效策略，并为通过d-p轨道杂化提高EGOR性能提供了基本见解。

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引用次数: 0

Light harvesting engineering of covalent organic frameworks for photocatalysis 用于光催化的共价有机框架的光收集工程

Advanced Powder Materials

Pub Date : 2025-12-16 DOI: 10.1016/j.apmate.2025.100388

Zimin Yang , Liping Guo , Xuepeng Wang , Lijun Liao , Zhenzi Li , Shijie Wang , Wei Zhou

As the primary and critical step in photocatalysis, the light-harvesting capability of photocatalyst directly determines the quantity of photogenerated charge carriers. This fundamental process ultimately governs both the photocatalytic efficiency and overall solar energy conversion. Covalent organic frameworks (COFs), as a representative class of porous organic photocatalysts, demonstrate significant potential for various photocatalytic applications with the flexible structural design. In this regard, the fundamental principles and critical factors influencing light harvesting in COF photocatalysts are reviewed in this work to provide a mechanistic understanding of light absorption and utilization. Additionally, strategies for expanding the light absorption range based on the recent advancements are summarized, including donor-acceptor system design, heteroatom doping, planarization design, metal incorporation, heterostructure engineering, and sensitization. Finally, the challenges and opportunities for COFs are forecast, including developing new sensitization strategies, balancing photothermal and photocatalytic effects, and industrializing their synthesis and application.

光催化剂作为光催化的首要和关键步骤，其捕光能力直接决定了光生载流子的数量。这一基本过程最终决定了光催化效率和整体太阳能转换。共价有机框架（COFs）作为多孔有机光催化剂的代表，由于其灵活的结构设计，在各种光催化领域具有很大的应用潜力。本文综述了影响COF光催化剂光收集的基本原理和关键因素，以期对COF光催化剂光吸收和利用的机理有一个较全面的认识。此外，根据近年来的研究进展，总结了扩大光吸收范围的策略，包括供体-受体系统设计、杂原子掺杂、平面化设计、金属掺入、异质结构工程和增敏。最后，展望了COFs面临的挑战和机遇，包括开发新的敏化策略，平衡光热和光催化效应，实现其合成和应用的工业化。

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引用次数: 0

Forecasting mechanoluminescence self-recovery stability via optically-stimulated luminescence 利用光激发发光预测机械发光自恢复稳定性

Advanced Powder Materials

Pub Date : 2025-12-16 DOI: 10.1016/j.apmate.2025.100390

Sheng Wu , Yinzhen Wang , Puxian Xiong

Mechanoluminescence (ML) materials, known for the ability to convert mechanical energy into light, are increasingly recognized for their potential applications. However, current ML research mainly focuses on improving luminescence performance and exploring practical applications, while the self-recovery behavior under continuous mechanical stimuli has not been deeply studied. Here, based on ZnS: Cu⁺, ZnS: Mn²⁺ and SrAl₂O₄: Eu²⁺, Dy³⁺, we systematically investigated the consistent positive correlation relationship between ML self-recoverable response stability and optically-stimulated luminescence (OSL). In addition, this positive correlation still exists after high-temperature treatment at 573.15 K. Through multiple consecutive (∼50 times) ML and OSL response tests, a positive correlation between ML self-recovery ability and OSL stability was established: ML materials with high OSL stability may usually exhibit excellent ML self-recovery ability, and vice versa. These findings provide a convenient and quantifiable strategy for predicting and evaluating the long-term performance of ML materials.

机械发光（ML）材料，以其将机械能转化为光的能力而闻名，因其潜在的应用而越来越受到认可。然而，目前的ML研究主要集中在提高发光性能和探索实际应用上，而在持续机械刺激下的自恢复行为尚未深入研究。本文以ZnS: Cu+， ZnS: Mn2+和SrAl2O4: Eu2+， Dy3+为基础，系统地研究了ML自恢复响应稳定性与光激发发光（OSL）之间的一致正相关关系。此外，在573.15 K高温处理后，这种正相关关系仍然存在。通过多次连续（~ 50次）ML和OSL响应试验，发现ML自恢复能力与OSL稳定性呈正相关：高OSL稳定性的ML材料通常具有优异的ML自恢复能力，反之亦然。这些发现为预测和评估ML材料的长期性能提供了方便和可量化的策略。

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引用次数: 0

Achieving ultra-stable hydrogen evolution at 2000 mA cm−2 via a hierarchical Pt electrocatalyst with dual charge/mass transfer networks 通过具有双重电荷/传质网络的分层Pt电催化剂在2000 mA cm−2下实现超稳定的析氢

Advanced Powder Materials

Pub Date : 2025-12-11 DOI: 10.1016/j.apmate.2025.100389

Yichao Huang , Huawei Shen , Limin Wang , Huaxiao Xie , Dong Liang , Jiashen Xing , Lulu Chen , Xudong Dai , Yan Zhou , Meihong Liao , Youguo Yan , Zhuangjun Fan

Designing electrocatalysts with rapid charge/mass transfer kinetics and robust stability is pivotal for achieving a high-performance electrocatalytic hydrogen production. Herein, a dual charge/mass transfer network with internal platinum anchored nitrogen-doped reduced graphene oxide (NrGO) nanoribbons and interlayered external carbon nanotubes (CNTs) has been engineered to construct a 3D hierarchical Pt@NrGO/CNTs electrocatalyst. Systematic studies reveal that the NrGO nanoribbons can not only efficiently anchor the Pt active sites via Pt–N bonding, avoiding the exfoliation induced by bubble rupture and electrolyte convection at a high current density, but also serve as an internal conductive network to continuously supply electrons and reactants to the Pt active sites. Moreover, the CNTs can serve as an external conductive network to reduce NrGO nanoribbons stacking, forming abundant channels for charge/mass transfer. The optimized Pt@NrGO/CNTs catalyst exhibits a remarkable hydrogen evolution reaction performance: its mass activity at 50 mV overpotential is 24.14 A·mg_Pt⁻¹, which is 13.3 times than that of the commercial 20% Pt/C electrocatalyst, while maintaining stable operation for 300 h under 2000 mA cm⁻² in a practical proton exchange membrane water electrolyzers. The numerical and molecular dynamics simulations further indicate that the constructed internal and external conductive network of Pt@NrGO/CNTs can enhance the H⁺ and H₂ diffusion.

设计具有快速电荷/传质动力学和强大稳定性的电催化剂是实现高性能电催化制氢的关键。本文通过内部铂锚定氮掺杂还原氧化石墨烯（NrGO）纳米带和层间外部碳纳米管（CNTs）的双重电荷/传质网络，构建了三维层叠Pt@NrGO/CNTs电催化剂。系统研究表明，NrGO纳米带不仅可以通过Pt - n键有效地锚定Pt活性位点，避免在高电流密度下气泡破裂和电解质对流引起的剥离，而且可以作为内部导电网络持续向Pt活性位点提供电子和反应物。此外，碳纳米管可以作为外部导电网络，减少NrGO纳米带的堆积，形成丰富的电荷/质量传递通道。优化后的Pt@NrGO/CNTs催化剂表现出优异的析氢反应性能：在50 mV过电位下，其质量活性为24.14 a·mgPt−1，是20% Pt/C电催化剂的13.3倍，在实际质子交换膜水电解槽中，在2000 mA cm−2下可稳定运行300 h。数值和分子动力学模拟进一步表明，Pt@NrGO/CNTs构建的内外导电网络能够促进H+和H2的扩散。

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引用次数: 0

High entropy electrolyte modifies electrode/electrolyte interface promoting highly reversible zinc anode 高熵电解质修饰电极/电解质界面，提高锌阳极的高可逆性

Advanced Powder Materials

Pub Date : 2025-12-03 DOI: 10.1016/j.apmate.2025.100387

Yuao Wang , Tiantian Wang , Shenglian Zhong , Fengbao Qin , Penghui Cui , Yiyang Mao , Ke Ye , Fang Hu , Dianxue Cao , Kai Zhu

Aqueous zinc-ion batteries (AZIBs) have drawn considerable interest owing to their affordability, safety, and eco-friendly nature. Unfortunately, the uneven deposition on the Zn anode promotes the growth of dendrites, and the corrosion of Zn by interfacial active water triggers a severe hydrogen evolution reaction (HER), which greatly hampers the further application of AZIBs. Therefore, a high-entropy (HE) electrolyte strategy is proposed to achieve a highly reversible Zn metal anode and an improved electrode/electrolyte interface (EEI). Specifically, this HE electrolyte achieves a water-poor solvation structure through N'N dimethylformamide (DMF) modulation of the solvation structure and accelerates Zn²⁺ diffusion. The dynamic adsorption processes of benzylideneacetone (BDA) and DMF adsorption on the Zn anode strengthen the electrode-electrolyte interface, promoting uniform Zn deposition and interfacial stability are achieved. Consequently, Zn||Zn symmetric cells demonstrate cycle stability exceeding 1400 h, while Zn||Cu cells achieve an average Coulombic efficiency of 99.63% over 750 cycles. In addition, full cells assembled with this electrolyte demonstrates their great potential for practical applications. This study provides a promising idea for designing high-performance aqueous high-entropy electrolytes.

水性锌离子电池（azib）因其可负担性、安全性和环保性而引起了相当大的兴趣。不幸的是，Zn阳极上的不均匀沉积促进了枝晶的生长，界面活性水对Zn的腐蚀引发了严重的析氢反应（HER），这极大地阻碍了azib的进一步应用。因此，提出了一种高熵（HE）电解质策略来实现高度可逆的Zn金属阳极和改进的电极/电解质界面（EEI）。具体而言，该HE电解质通过N - N二甲基甲酰胺（DMF）对溶剂化结构的调节，实现了贫水溶剂化结构，加速了Zn2+的扩散。在锌阳极上吸附苄基丙酮（BDA）和DMF的动态吸附过程强化了电极-电解质界面，促进了锌的均匀沉积和界面稳定性。因此，Zn||Zn对称电池的循环稳定性超过1400 h，而Zn||Cu电池在750次循环中平均库仑效率达到99.63%。此外，用这种电解质组装的全电池显示了它们在实际应用中的巨大潜力。该研究为高性能高熵水溶液电解质的设计提供了一个有希望的思路。

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引用次数: 0

P2-phase Fe1/2Mn1/2 and Ni1/4Mn3/4 manganese-based system materials for advanced sodium-ion batteries: Quo Vadis? 先进钠离子电池用p2相Fe1/2Mn1/2和Ni1/4Mn3/4锰基体系材料

Advanced Powder Materials

Pub Date : 2025-12-02 DOI: 10.1016/j.apmate.2025.100386

Rui Huang , Shaohua Luo , Zhaozhan Shi , Lixiong Qian , Xin Liu , Shengxue Yan

Driven by the growing demand for efficient energy storage in renewable systems, sodium batteries have triggered extensive attention for scaled applications due to their rapid ion kinetics, exceptional cycling stability, and cost-effectiveness. Among the cathode candidates, manganese-based layered oxides emerge as particularly promising owing to their economic viability and high theoretical capacity, with Fe-Mn and Ni-Mn binary systems demonstrating remarkable synergistic effects. In this study, focusing on the Fe_1/2Mn_1/2 and Ni_1/4Mn_3/4 Mn-based oxide systems with specific stoichiometric ratios, we systematically reviewed the research progress of key modification strategies, such as bulk phase doping and surface coating, and revealed the mechanism of the transition metal coordination reconstruction on the diffusion kinetics of sodium ions. Based on the in-depth analysis of the function mechanism of the material, the study further points out that the construction of a new type of multifunctional composite cathode through multi-scale structural design is an important way to realize the synergistic enhancement of high energy density and high cycling stability, in which the optimization of the electronic structure of the bulk phase and the enhancement of the interfacial stability are especially critical. This paper not only provides a theoretical basis for the rational design of manganese-based oxide cathode, but also points out the direction of technological breakthrough for the development of the next-generation sodium energy storage system that can be adapted to the extreme working conditions.

在可再生能源系统对高效储能需求不断增长的推动下，钠电池因其快速的离子动力学、卓越的循环稳定性和成本效益而引起了大规模应用的广泛关注。在阴极候选材料中，锰基层状氧化物因其经济可行性和较高的理论容量而显得特别有前途，Fe-Mn和Ni-Mn二元体系表现出显著的协同效应。本研究以特定化学计量比的Fe1/2Mn1/2和ni1 / 4mn3 / 4mn基氧化物体系为研究对象，系统综述了体相掺杂和表面包覆等关键改性策略的研究进展，揭示了过渡金属配位重构对钠离子扩散动力学的影响机理。在深入分析材料作用机理的基础上，进一步指出通过多尺度结构设计构建新型多功能复合阴极是实现高能量密度和高循环稳定性协同增强的重要途径，其中体相电子结构的优化和界面稳定性的增强尤为关键。本文不仅为锰基氧化物阴极的合理设计提供了理论依据，也为开发适应极端工况的下一代钠储能系统指明了技术突破方向。

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引用次数: 0

Nitrogen-triggered plasmonic bifunctionality in ruthenium/titanium oxynitride Schottky catalyst for energized hydrazine-seawater hydrogen production 氮触发等离子体双功能的钌/氧化钛氮化肖特基催化剂为通电肼-海水制氢

Advanced Powder Materials

Pub Date : 2025-11-21 DOI: 10.1016/j.apmate.2025.100384

Jiajun Luo , Congyuan Zeng , Rui Yang , Jingyun Mao , Hui Xue , Shuangjuan Shen , Yiyin Huang , Yuanyuan Sun , Haoran Jiang , Yaobing Wang

Plasmon-coupled hydrazine-seawater electrolysis emerges as an advanced hydrogen generation approach characterized by enhanced product efficiency and renewable utilization. Though the integration of plasmonic effects with bifunctional catalysts promises to revolutionize system design, the design of such catalysts with plasmonic bifunctionality remains a huge challenge. Our work breaks new ground by employing nitrogen as a “molecular switch” to trigger plasmonic bifunctionality in ruthenium/titanium oxynitride (Ru/TiNO_0.6), achieving intrinsically and plasmon-energized hydrogen evolution reaction (overpotential: 13.5 mV) and hydrazine oxidation reaction (overpotential: 222.3 mV). The plasmonic two-electrode system demonstrates remarkable performance enhancement, boosting current density by 34.6% (127.5 → 171.6 mA cm⁻² at 0.2V) with maintaining near 100% selective conversion to H₂/N₂. Through advanced characterization and theoretical analysis, we decode nitrogen's triple role: it narrows band gap of substrate and enhances both photoelectronic and photothermal effects; it enhances Mott-Schottky effects to generate metastable amorphous Ru species, and induces interface charge polarization with creating built-in electric fields that synergistically lower activation barriers. These concerted effects yield optimal hydrogen adsorption energetics (ΔG_∗H) while facilitating ∗N₂H₃ intermediate formation and shift of rate determining step, establishing a new paradigm for plasmon-driven bifunctional electrocatalysis.

等离子体耦合肼-海水电解是一种先进的制氢方法，具有提高产品效率和可再生利用的特点。虽然等离子体效应与双功能催化剂的整合有望彻底改变系统设计，但这种具有等离子体双功能的催化剂的设计仍然是一个巨大的挑战。我们的工作开辟了新的领域，利用氮作为“分子开关”来触发氧化钌/氧化钛（Ru/TiNO0.6）中的等离子体双功能，实现了本质和等离子体激发的析氢反应（过电位：13.5 mV）和肼氧化反应（过电位：222.3 mV）。等离子体双电极系统表现出显著的性能增强，在0.2V时电流密度提高34.6%(127.5→171.6 mA cm−2)，并保持接近100%的H2/N2选择性转化。通过先进的表征和理论分析，我们解码了氮的三重作用：它缩小了衬底的带隙，增强了光电子和光热效应；它增强了Mott-Schottky效应，生成亚稳态非晶钌，并通过产生内置电场来诱导界面电荷极化，从而协同降低激活势垒。这些协同效应产生了最佳的氢吸附能量（ΔG∗H），同时促进了∗N2H3中间产物的形成和速率决定步骤的移动，建立了等离子体驱动双功能电催化的新范式。

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引用次数: 0

Zinc-compound iodine battery chemistry with dual functional oxalate-based electrolyte 双功能草酸盐电解质的锌-复合碘电池化学研究

Advanced Powder Materials

Pub Date : 2025-11-21 DOI: 10.1016/j.apmate.2025.100385

Jia Wu , Shan Guo , Xuefang Xie , Mulan Qin , Shuquan Liang , Guozhao Fang

Aqueous iodine-based batteries represent great promising for safe and low-cost energy storage system. However, traditional zinc metal iodine batteries suffer from self-discharge (polyiodide shuttle to the zinc anode) and low operating voltage (vs. Zn²⁺/Zn). Herein, a novel zinc-compound (ZnC₂O₄·2H₂O, ZCO) iodine battery chemistry based on dual functional K₂C₂O₄ electrolyte was first proposed in response to these challenges. The C₂O₄²⁻, characterized by its exceptionally low solubility with zinc cations, effectively induces a transition in zinc deposition behaviour from a liquid-to-solid to a solid-to-solid mechanism, thereby significantly enhancing the cell's voltage output. Meanwhile, the lone-pair electrons of the C₂O₄²⁻ engage in strong donor/acceptor interactions with the vacant σ∗ orbitals of I₂ and I₃⁻, resulting in the formation of stable electronic coordination structures and the suppression of polyiodide generation and shuttle. Therefore, the ZCO-I₂ full cell has excellent cycling stability over 2000 cycles and impressive Coulombic efficiency of 99.8%. This work provides a new perspective for novel conversion-type anode/electrolyte engineering and mechanism innovation in aqueous iodine-based battery systems.

水基碘电池在安全、低成本的储能系统中具有广阔的应用前景。然而，传统的锌金属碘电池存在自放电（多碘化物穿梭到锌阳极）和低工作电压（相对于Zn2+/Zn）的问题。本文首次提出了一种基于双功能K2C2O4电解质的新型锌化合物（ZnC2O4·2H2O， ZCO）碘电池化学方法来应对这些挑战。C2O42−与锌阳离子的溶解度极低，可以有效地诱导锌沉积行为从液-固过渡到固-固机制，从而显著提高电池的电压输出。同时，C2O42−的孤对电子与I2和I3−的空σ *轨道发生强烈的供体/受体相互作用，形成稳定的电子配位结构，抑制了多碘化物的生成和穿梭。因此，ZCO-I2全电池具有超过2000次循环的优异稳定性和令人印象深刻的99.8%的库仑效率。这项工作为新型转换型阳极/电解质工程和水基碘电池系统机理创新提供了新的视角。

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引用次数: 0