ChemElectroChem最新文献_第5页

Titanium Architectures for Durable Water Electrolysis: From MXenes and Magnéli Phases to Single-Atom Catalysts 持久水电解的钛结构：从MXenes和magnacimli相到单原子催化剂

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-07 DOI: 10.1002/celc.70247

Yunju Hwang, Hansaem Choi, Seungeun Lee, Su-Il In

{"title":"Titanium Architectures for Durable Water Electrolysis: From MXenes and Magnéli Phases to Single-Atom Catalysts","authors":"Yunju Hwang, Hansaem Choi, Seungeun Lee, Su-Il In","doi":"10.1002/celc.70247","DOIUrl":"https://doi.org/10.1002/celc.70247","url":null,"abstract":"The urgent transition toward a carbon-neutral energy economy positions water electrolysis as a cornerstone for sustainable “green hydrogen” production. While noble-metal catalysts define current benchmarks, their prohibitive costs and scarcity necessitate the development of robust, Earth-abundant alternatives. This review provides a comprehensive analysis of advanced titanium (Ti)-based architectures—specifically 2D MXenes, Magnéli phase suboxides (TinO2n−1), and single-atom catalysts (SACs)—as transformative platforms for hydrogen and oxygen evolution reactions (HER/OER). We examine the synergistic effects of MXenes, where metallic conductivity and tunable surface terminations (Tx) optimize hydrogen adsorption energetics. Simultaneously, we highlight exceptional electrochemical stability and strong metal–support interactions (SMSI) of Magnéli phases, which effectively circumvent the “universal scaling relationship” bottlenecks in OER. Furthermore, we emphasize the integration of SACs on these Ti-based supports, where engineering the local coordination environment maximizes atom utilization and intrinsically boosts catalytic activity. A strategic emphasis is placed on direct seawater electrolysis, highlighting the “chlorophobic” and self-healing properties of Ti-interfaces that ensure long term durability against chloride corrosion and mineral scaling. By integrating AI-driven discovery and field-scale engineering perspectives, this review provides a strategic roadmap for designing high-performance, non-noble metal-based systems for industrial-scale energy conversion, offering a viable solution to the long-standing stability-activity trade-off in extreme environments.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 16","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70247","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Role of Tip Charges in Dendrite Growth on Lithium Electrodes 尖端电荷在锂电极枝晶生长中的作用

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-06 DOI: 10.1002/celc.70282

W. Schmickler, L. Goncebat, G. Belletti, P. Quaino

引用次数: 0

Preparation of Lanthanum–Nickel Alloy Nanoparticles Through Low-Temperation Electrolysis in Molten Chlorides 低温电解法制备镧镍合金纳米颗粒

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-06 DOI: 10.1002/celc.70257

Yusheng Yang, Ying Qin, V. V. Neshchimenko, He Sun, Milin Zhang

{"title":"Preparation of Lanthanum–Nickel Alloy Nanoparticles Through Low-Temperation Electrolysis in Molten Chlorides","authors":"Yusheng Yang, Ying Qin, V. V. Neshchimenko, He Sun, Milin Zhang","doi":"10.1002/celc.70257","DOIUrl":"https://doi.org/10.1002/celc.70257","url":null,"abstract":"Growing global energy demands underscore the need for efficient, controllable synthesis of nanostructured hydrogen storage alloys. This work addresses the challenge of preparing composition- and morphology-controlled La–Ni intermetallic nanoparticles via a one-step electrochemical route in molten chlorides. We compared three electrochemical systems: La(III) reduction on an inert W electrode, co-reduction of La(III) and Ni(II) on a W electrode, and La(III) reduction on a solid Ni electrode. Cyclic voltammetry, square wave voltammetry, and potentiostatic electrolysis at 647 K were employed to elucidate the deposition mechanisms. The results demonstrate that using a solid Ni cathode enables the direct formation of uniform LaNi5 nanoparticles with an average size of 100 nm and a well-defined 1:5 La/Ni ratio, whereas the co-deposition of La(III) and Ni(II) on a W electrode yields multiphase, agglomerated particles. The study reveals the critical role of the cathode material in directing phase selectivity and nanoparticle uniformity, providing a clean, one-step alternative to conventional ball-milling methods that yields LaNi5 nanoparticles with monodisperse distribution. This approach offers a practical pathway to synthesize high-performance hydrogen-storage nanomaterials with tailored compositions and morphologies.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 16","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70257","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent Developments in Electrochemical Lignin Depolymerization Using Flow Systems: A Mini Review 流动体系木质素电化学解聚研究进展

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-04 DOI: 10.1002/celc.70283

Lukas Lentz, Jens Tübke, Robin Kunkel

{"title":"Recent Developments in Electrochemical Lignin Depolymerization Using Flow Systems: A Mini Review","authors":"Lukas Lentz, Jens Tübke, Robin Kunkel","doi":"10.1002/celc.70283","DOIUrl":"https://doi.org/10.1002/celc.70283","url":null,"abstract":"Lignin, the second most abundant biopolymer, remains critically underutilized despite annual availability of 50 million tons. Electrochemical flow depolymerization combines energy-efficient hydrogen production with selective lignin upgrading, offering a promising pathway to unlock this renewable aromatic feedstock. This mini-review provides the first systematic analysis of flow-based anodic lignin depolymerization studies, categorizing them into three strategic objectives: (1) oxygen evolution reaction (OER) substitution achieving cell voltage reductions of 0.2–0.45 V and 20%–40% energy savings, (2) nonselective fragmentation yielding oligomeric intermediates with molecular weight reductions up to 87%, and (3) selective monomer production up to 8 wt%. Critical deficiencies limiting industrial translation include incomplete lignin characterization, heterogeneous reactor descriptions, absence of standardized analytics, and prevalence of semibatch over continuous operation. Six research priorities are defined: (1) transition to continuous single-pass or CSTR configurations with integrated product separation, (2) standardized test protocols and reference lignins with unified analytical methods, (3) comprehensive reactor design specifications, (4) development of stable noble metal-free electrodes, (5) integration of continuous downstream separation technologies, and (6) systematic technoeconomic and life cycle assessments versus petrochemical benchmarks. This roadmap advances electrochemical lignin valorization from laboratory toward industrial readiness, essential for circular carbon economy strategies and chemical industry defossilization.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 16","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70283","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Decoupling Electronic Activation and Pore Connectivity in Acidic Oxygen Reduction on Metal-Free Biomass-Derived Carbon Catalysts 无金属生物质衍生碳催化剂酸性氧还原过程中的解耦、电子活化和孔连通性

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-08-02 DOI: 10.1002/celc.70277

Ravi Singh, Daisuke Shibata, Daiki Kido, Tomohiro Ishii, Kenji Hayashida, Kaito Homma, Muhammad Asif, Santosh K. Singh, Lu Bang, Masao Kimura, Satoru Takakusagi, Kotaro Takeyasu

{"title":"Decoupling Electronic Activation and Pore Connectivity in Acidic Oxygen Reduction on Metal-Free Biomass-Derived Carbon Catalysts","authors":"Ravi Singh, Daisuke Shibata, Daiki Kido, Tomohiro Ishii, Kenji Hayashida, Kaito Homma, Muhammad Asif, Santosh K. Singh, Lu Bang, Masao Kimura, Satoru Takakusagi, Kotaro Takeyasu","doi":"10.1002/celc.70277","DOIUrl":"https://doi.org/10.1002/celc.70277","url":null,"abstract":"Acidic oxygen reduction is often discussed as if catalytic activation and mass transport were inseparable. Here, biomass-derived carbon was used to examine these contributions through oxidation, ammonia annealing, and KOH activation. The onset potential is associated primarily with defect-derived pz/π electronic states, whereas the maximum slope in the transport-influenced region is associated with hierarchical pore accessibility and connectivity. Apparent electrochemically accessible surface area does not correlate significantly with onset potential in the six-sample series, although it covaries with maximum slope; this covariance is attributed to pore accessibility rather than surface area itself. Multiscale X-ray tomography of the optimized catalyst visualizes connected pore pathways from macro- to submicrometer scales, while the connected framework may be partly inherited from the rice-husk precursor. The combined results support preferentially separate consideration of electronic activation and pore-network accessibility for the acidic oxygen reduction reaction.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 16","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70277","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148652405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical Reduction of Nitrate to Ammonia on Transition-Metal Sputtered Copper Foams 过渡金属溅射泡沫铜电解还原硝酸盐为氨

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-26 DOI: 10.1002/celc.70280

Sabita Bhandari, Nick Hausen, Xin Wei, Michael Noyong, Regina Palkovits, Ulrich Simon

引用次数: 0

Identical-Location SEM Tracking of Pt/C Gas Diffusion Electrode Degradation at Fuel-Cell-Relevant Current Densities 燃料电池相关电流密度下Pt/C气体扩散电极降解的同位SEM跟踪

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-24 DOI: 10.1002/celc.70265

Aleš Marsel, Miha Hotko, Gregor Kapun, Marjan Bele, Lazar Bijelić, Enrico Petrucco, Christopher M. Zalitis, Alex Martinez Bonastre, Nejc Hodnik

{"title":"Identical-Location SEM Tracking of Pt/C Gas Diffusion Electrode Degradation at Fuel-Cell-Relevant Current Densities","authors":"Aleš Marsel, Miha Hotko, Gregor Kapun, Marjan Bele, Lazar Bijelić, Enrico Petrucco, Christopher M. Zalitis, Alex Martinez Bonastre, Nejc Hodnik","doi":"10.1002/celc.70265","DOIUrl":"https://doi.org/10.1002/celc.70265","url":null,"abstract":"Understanding Pt/C catalyst degradation under relevant proton-exchange membrane fuel cell (PEMFC) conditions remains challenging because most identical-location studies are conducted under nonrepresentative conditions (rotating disk electrode), configurations at low current densities. In this work, we combine a gas diffusion electrode platform with identical-location scanning electron microscopy (IL-SEM) to track morphological changes in Pt/C catalysts during accelerated stress testing while evaluating oxygen reduction reaction (ORR) performance at fuel-cell-relevant current densities (up to ∼1 A cm−2). Reliable relocation of identical sites is achieved using unique crack patterns in the gas diffusion electrode (GDE) catalyst layer as intrinsic markers. IL-SEM imaging before and after electrochemical treatment reveals Pt nanoparticle restructuring after 10,000 accelerated stress test (AST) cycles, whereas no detectable morphological changes are observed after the initial break-in procedure. Higher resolution IL-SEM shows environment-dependent degradation pathways, with isolated particles predominantly undergoing dissolution/redeposition and particle-rich regions more frequently exhibiting detachment/agglomeration. Within the resolution and depth sensitivity of SEM, no clear morphological changes are detected in the carbon support. Complementary transmission electron microscopy (TEM) particle-size analysis shows depletion of the smallest Pt particles after AST, consistent with their dissolution and subsequent redeposition onto larger particles. These results demonstrate that the combined IL-SEM/GDE approach provides a route for directly identifying nanoscale degradation mechanisms under electrochemical conditions substantially closer to real fuel-cell operation.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 15","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70265","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148615977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pressure-Dependent Electronic and Ionic Tortuosities During Fabrication of Composite Cathodes for All-Solid-State Batteries: Influence of Active Material Particle Morphology, Volume Fraction, and Coating 全固态电池复合阴极制造过程中的压力依赖性电子和离子扭曲：活性材料颗粒形态、体积分数和涂层的影响

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-21 DOI: 10.1002/celc.70274

Vanessa Miß, Greta Müller, Sophie Schäfer, Evelyn Versok, Stefan Seus, Valeriu Mereacre, Joachim R. Binder, Bernhard Roling

{"title":"Pressure-Dependent Electronic and Ionic Tortuosities During Fabrication of Composite Cathodes for All-Solid-State Batteries: Influence of Active Material Particle Morphology, Volume Fraction, and Coating","authors":"Vanessa Miß, Greta Müller, Sophie Schäfer, Evelyn Versok, Stefan Seus, Valeriu Mereacre, Joachim R. Binder, Bernhard Roling","doi":"10.1002/celc.70274","DOIUrl":"https://doi.org/10.1002/celc.70274","url":null,"abstract":"The cathode of bulk-type all-solid-state batteries (ASSBs) is a composite consisting of cathode active material (CAM) particles and solid electrolyte (SE) particles. Since ASSBs are usually fabricated and cycled under pressure, it is important to achieve a better understanding of the influence of pressure on the electronic and ionic transport in CAM/SE composites. However, experimental values for pressure-dependent electronic and ionic conductivities of CAM/SE composites are scarce. Therefore, we have carried out pressure-dependent impedance spectroscopic measurements during compaction of composite powders under an increasing fabrication pressure up to 663 MPa. The composites contained four different types of LiNi0.6Mn0.2Co0.2O2 (NMC622) cathode active material particles: (i) single-crystalline and uncoated, (ii) single-crystalline and coated with LiNbO3, (iii) polycrystalline and uncoated, and (iv) polycrystalline and coated with LiNbO3. In addition, the volume fractions of CAM particles and SE particles were varied. The physical meaning of the resistances extracted from the impedance spectra were analyzed, and electronic and ionic tortuosities were calculated. A strong influence of the CAM particle morphology and coating on the microstructure of the composites was observed. Based on the results, the interrelation between composite microstructure and tortuosities is discussed.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 15","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70274","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148533961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrodeposited Nickel–Tungsten Alloy Films With Multiporous Architecture for Hydrogen Evolution Reaction in Acidic Media 电沉积多孔结构镍钨合金膜在酸性介质中的析氢反应

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-21 DOI: 10.1002/celc.70276

Roger de Paz-Castany, Konrad Eiler, Salvador Pané, Jordi Sort, Annick Hubin, Eva Pellicer

{"title":"Electrodeposited Nickel–Tungsten Alloy Films With Multiporous Architecture for Hydrogen Evolution Reaction in Acidic Media","authors":"Roger de Paz-Castany, Konrad Eiler, Salvador Pané, Jordi Sort, Annick Hubin, Eva Pellicer","doi":"10.1002/celc.70276","DOIUrl":"https://doi.org/10.1002/celc.70276","url":null,"abstract":"Porous Ni–W alloy films were fabricated by electrodeposition from a gluconate-based electrolyte using three approaches: (i) micelle-assisted deposition with Pluronic P-123, (ii) colloidal crystal templating, and (iii) a combination of both. Hierarchically porous films were produced either by plating from a P-123-containing electrolyte onto substrates patterned with 200 nm polystyrene spheres, or from a P-123-free electrolyte onto substrates patterned with mixed 20 and 200 nm spheres. Dense Ni–W films were deposited under comparable conditions for reference. The tungsten content ranged from 1 to 19 wt.% depending on the method. All coatings were nanocrystalline single-phase face-centered cubic alloys, with diffraction peaks shifting to lower 2θ values as W content increased. Electrochemical evaluation of the hydrogen evolution reaction in 0.5 M H2SO4 revealed superior catalytic performance for the multiporous films templated with 20 and 200 nm spheres, achieving an overpotential (η10) of 300 mV versus reversible hydrogen electrode at −10 mA cm–2 and a Tafel slope of ∼134 mV dec–1. The enhanced activity was attributed to the combined effect of high surface area and increased W content, while long-term durability improved primarily with higher W content, as confirmed by 24 h potentiometry at −10 mA cm–2.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 15","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70276","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148533959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploiting Electronic Metal–Support Interactions in Fe–Nx/Carbon Shell-Coated TiO2 Hybrids for Boosting Oxygen Reduction 利用Fe-Nx /碳壳包覆TiO2杂化物中的电子金属支撑相互作用促进氧还原

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-07-21 DOI: 10.1002/celc.70279

Yunjin Kim, Jiho Min, Keonwoo Ko, Beomjun Pak, Sourabh S. Chougule, Abhishek A. Chavan, Khikmatulla Davletbaev, Namgee Jung

{"title":"Exploiting Electronic Metal–Support Interactions in Fe–Nx/Carbon Shell-Coated TiO2 Hybrids for Boosting Oxygen Reduction","authors":"Yunjin Kim, Jiho Min, Keonwoo Ko, Beomjun Pak, Sourabh S. Chougule, Abhishek A. Chavan, Khikmatulla Davletbaev, Namgee Jung","doi":"10.1002/celc.70279","DOIUrl":"https://doi.org/10.1002/celc.70279","url":null,"abstract":"Anion exchange membrane fuel cells (AEMFCs) are promising for energy conversion, but the sluggish oxygen reduction reaction (ORR) at the cathode still relies on platinum group metal (PGM) catalysts, increasing cost. Fe–N–C catalysts are widely studied as PGM-free alternatives owing to their high initial activity, yet they often degrade during operation. In parallel, chemically stable oxides such as TiO2 can enhance activity and durability through electronic metal–support interactions (EMSI); however, oxide supports have been used mainly with metal nanoparticles because stabilizing atomically dispersed active sites on oxides remains challenging. Here, we report a PGM-free ORR catalyst, FePc/TiO2@NC, comprising atomically dispersed Fe–Nx sites on a nitrogen-doped carbon shell-coated TiO2 support. This structure improves the electrical conductivity and structural robustness of TiO2 and induces strong EMSI to tune the electronic structure of the Fe sites, delivering remarkable ORR activity in alkaline media and superior stability after 5000 cycles of accelerated degradation test (ADT).","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 15","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70279","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148533960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0