{"title":"Novel approaches to aqueous zinc-ion batteries: Challenges, strategies, and prospects","authors":"Wei Lv, Junlin Liu, Zilei Shen, Xudong Li, Chao Xu","doi":"10.1016/j.esci.2025.100410","DOIUrl":"10.1016/j.esci.2025.100410","url":null,"abstract":"<div><div>Aqueous zinc-ion batteries (AZIBs) represent a forefront technology for grid-scale energy storage, distinguished by inherent safety, economic viability, and ecological compatibility. Nevertheless, prevailing AZIBs research remains tethered to conventional methods, thereby hindering both mechanism elucidation and real-world interdisciplinary application. In this review, we commence by critically examining recent advancements in methodological innovations pertaining to the optimization of cathode, anode, and electrolyte in AZIBs. Subsequently, we elucidate pioneering applications of AZIBs in emerging domains, with particular emphasis on their enormous potential in biomedical technologies. To conclude, we unveil contemporary challenges, propose evidence-based strategies, and delineate future directions to establish robust theoretical cornerstones and practical roadmaps for the commercial scalability of AZIBs. By integrating foundational science with cross-disciplinary research achievements, this review aims to substantially advance fundamental comprehension of AZIBs while accelerating their multidisciplinary progress across diverse technological frontiers.</div></div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"5 6","pages":"Article 100410"},"PeriodicalIF":36.6,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145340507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
eSciencePub Date : 2025-11-01Epub Date: 2025-03-19DOI: 10.1016/j.esci.2025.100402
Zhirong Zhang , Peiyu Ma , Chuanyi Jia , Wenting Gao , Mingkai Liu , Kwun Nam Hui , Ming Zuo , Shiming Zhou , Jie Zeng
{"title":"Site-specific stabilizing effect of single atoms on spinel oxides for acidic oxygen evolution","authors":"Zhirong Zhang , Peiyu Ma , Chuanyi Jia , Wenting Gao , Mingkai Liu , Kwun Nam Hui , Ming Zuo , Shiming Zhou , Jie Zeng","doi":"10.1016/j.esci.2025.100402","DOIUrl":"10.1016/j.esci.2025.100402","url":null,"abstract":"<div><div>Developing efficient and economical non-precious metal electrocatalysts for acidic oxygen evolution reaction (OER) is crucial for proton exchange membrane water electrolyzers (PEMWE). Spinel oxides are considered promising non-precious acidic OER catalysts due to their excellent activities. However, the structure dissolution of spinel oxides in acidic conditions severely limits their applications in PEMWE. Introducing acid-resistant heteroatoms into spinel oxides is an available strategy to enhance their stability. Herein, by anchoring Ir single atoms at different sites of spinel oxide Co<sub>3</sub>O<sub>4</sub>, we demonstrated that the stabilizing effect strongly depends on the single-atom anchoring site. Electrochemical measurements and <em>in situ</em> spectroscopic characterization revealed that the Ir single atoms anchored at lattice sites significantly enhanced the stability of Co<sub>3</sub>O<sub>4</sub> during acidic OER in comparison with ones at three-fold hollow sites. The long-term durability test showed that the Ir single atoms at lattice sites stabilized Co<sub>3</sub>O<sub>4</sub> during a 200 h continuous operation at a current density of 10 mA cm<sup>−</sup><sup>2</sup>. Moreover, the resultant PEMWE device fabricated by the catalyst achieved a stability time of about 60 h at a current density of 1 A cm<sup>−</sup><sup>2</sup>. Mechanistic studies revealed that Ir single atoms at lattice sites enhanced the covalency between Co and O atoms, thereby suppressing their migration and improving the stability of spinel oxides. The discovery of the site-specific stabilizing effect of single atoms provides essential guidance for the rational design of highly stable electrocatalysts for PEMWE.</div></div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"5 6","pages":"Article 100402"},"PeriodicalIF":36.6,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145528416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
eSciencePub Date : 2025-11-01Epub Date: 2025-05-26DOI: 10.1016/j.esci.2025.100431
Xin Zhao , Zhonghan Zhang , Chenfei Li , Lizhen Liu , Yonghao Xiao , Zihao Wang , Shuzhou Li , Han Sen Soo
{"title":"Steering the adsorption modes and oxidation state of Co oxyhydroxide active sites to unlock selective glucose oxidation to formate for efficient solar reforming of biomass to green hydrogen","authors":"Xin Zhao , Zhonghan Zhang , Chenfei Li , Lizhen Liu , Yonghao Xiao , Zihao Wang , Shuzhou Li , Han Sen Soo","doi":"10.1016/j.esci.2025.100431","DOIUrl":"10.1016/j.esci.2025.100431","url":null,"abstract":"<div><div>One solution to the intermittency of renewable energy sources is energy storage in fuels such as hydrogen produced by water electrolysis. However, current water electrolysis systems are plagued by high costs. Here, a co-electrolysis system for biomass-derived glucose and water is shown to achieve green hydrogen generation of over 500 μmol h<sup>−1</sup> cm<sup>−2</sup> using a membrane-free undivided cell with electrocatalysts comprising only earth-abundant elements, driven by a triple-junction photovoltaic. Glucose is selectively electrooxidized to formate with high yields of up to 80%, instead of water being oxidized into oxygen; the former circumvents the need for costly membranes to separate the hydrogen and oxygen gaseous products. High selectivity is achieved through cascade carbon–carbon bond oxidation by regulating the adsorption mode and moderating the oxidation state of cobalt with copper doping. The overall electrolysis potential is lowered by ∼400 mV compared to water splitting. The revenue from the formate co-product can lower the levelized cost of hydrogen from water electrolysis by $4.63/kg of hydrogen produced, making it competitive with grey hydrogen generation.</div></div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"5 6","pages":"Article 100431"},"PeriodicalIF":36.6,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145366117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
eSciencePub Date : 2025-11-01Epub Date: 2025-05-16DOI: 10.1016/j.esci.2025.100430
Yang Liu , Ruyan Wu , Yongzhen Jin , Jiaye Dong , Hongju Li , Jianhui Wang
{"title":"Balancing reactant adsorption for ultra-stable electrocatalytic methanol oxidation reaction","authors":"Yang Liu , Ruyan Wu , Yongzhen Jin , Jiaye Dong , Hongju Li , Jianhui Wang","doi":"10.1016/j.esci.2025.100430","DOIUrl":"10.1016/j.esci.2025.100430","url":null,"abstract":"<div><div>The practical application of the electrocatalytic methanol oxidation reaction (EMOR) has long been hindered by the lack of active and stable catalysts. Herein, we report a unique dealloyed PtMn catalyst on carbon cloth (<em>d</em>-PtMn/CC) characterized by a compressively strained Pt surface and a Mn concentration-gradient core. This <em>d</em>-PtMn/CC catalyst demonstrates EMOR activity that is 7–14 times higher than that of conventional Pt/CC catalysts in all-pH electrolytes, while exhibiting exceptional resistance to catalytic poisoning over a broad potential range of 0.4–1.2 V vs. reversible hydrogen electrode (RHE). When employed in direct methanol fuel cells, it achieves 111.6 mW cm<sup>−2</sup> for over 10 h at ultralow 0.59 mg<sub>Pt</sub> cm<sup>−2</sup>, substantially outperforming commercial Pt/C catalysts. Comparative analyses of adsorbed reactants/intermediates revealed that imbalanced adsorption of reactants on the catalyst surface is the primary cause of EMOR poisoning. The <em>d</em>-PtMn/CC catalyst, benefiting from surface compressive strain and ligand effects, maintains balanced reactant adsorption over the wide potential range, thereby achieving ultra-stable EMOR performance. These findings not only resolve the longstanding controversy regarding EMOR poisoning mechanism but also identify the effectiveness of the “ligand + surface strain” strategy in DMFCs, facilitating its practical applications.</div></div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"5 6","pages":"Article 100430"},"PeriodicalIF":36.6,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145366119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
eSciencePub Date : 2025-11-01Epub Date: 2024-12-07DOI: 10.1016/j.esci.2024.100352
Xiu-Mei Lin , Yu-Lin Sun , Yan-Xin Chen , Shun-Xing Li , Jian-Feng Li
{"title":"Insights into electrocatalysis through in situ electrochemical surface-enhanced Raman spectroscopy","authors":"Xiu-Mei Lin , Yu-Lin Sun , Yan-Xin Chen , Shun-Xing Li , Jian-Feng Li","doi":"10.1016/j.esci.2024.100352","DOIUrl":"10.1016/j.esci.2024.100352","url":null,"abstract":"<div><div>Electrocatalysis plays an essential role in sustainable energy conversion technologies such as fuel cells, water electrolysis, and the carbon dioxide reduction reaction that occurs at solid–liquid interfaces. However, due to the complexity of the respective electrochemical interfaces and trace amounts of interfacial species, researchers’ knowledge of these reaction mechanisms remains incomplete, limiting our ability to improve electrocatalytic performance. <em>In situ</em> electrochemical surface-enhanced Raman spectroscopy (EC-SERS) has proven to have appealing potential for the study of electrocatalytic reaction mechanisms because it can provide exceptionally sensitive fingerprint vibrational spectroscopic information about interfacial species and their interactions. This review offers insights into electrocatalysis through <em>in situ</em> EC-SERS. We begin with an introduction to the basic principles, substrate engineering, and the implementation of <em>in situ</em> EC-SERS for electrocatalysis, with an emphasis on capturing trace interfacial species and determining the capability of this technique. We then discuss fundamentals, still-debated mechanistic issues, as well as advanced applications of EC-SERS for mechanism studies of the fundamentally and practically important reactions in sustainable energy conversion technologies, to gain insights into electrocatalysis. Finally, we propose directions for the future development of <em>in situ</em> EC-SERS in catalysis. Through this review paper, we aim to attract greater attention to the use of <em>in situ</em> EC-SERS in catalysis studies and introduce versatile methodologies and techniques for catalytic studies that will result in superior performance.</div></div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"5 6","pages":"Article 100352"},"PeriodicalIF":36.6,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145340503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
eSciencePub Date : 2025-11-01Epub Date: 2025-02-12DOI: 10.1016/j.esci.2025.100378
Sixiao Liu , Jun Lu , Xu Yu , Huan Pang , Qiang Zhang , Ho Seok Park
{"title":"Rational design of metal–organic framework-nanoparticle composite electrocatalysts for sustainable nitrogen electrochemistry","authors":"Sixiao Liu , Jun Lu , Xu Yu , Huan Pang , Qiang Zhang , Ho Seok Park","doi":"10.1016/j.esci.2025.100378","DOIUrl":"10.1016/j.esci.2025.100378","url":null,"abstract":"<div><div>A faster and more environmentally friendly nitrogen treatment solution is required to address the demand for nitrogen resources and the negative environmental impacts of human activities. Nitrogen electrochemistry thus has received major attention as an avenue for achieving sustainable nitrogen conversion. Here, we comprehensively review recent progress in the rational design of metal–organic framework nanoparticle composites (MOF–NP) for sustainable nitrogen electrochemistry. Three synthesis MOF–NPs strategies are addressed, focusing on the growth of MOFs on NPs, the loading of NPs onto/into MOFs, and the simultaneous formation of MOFs and NPs. We also discuss the unique features of MOF materials and their derivatives for use in nitrogen reduction, nitrate reduction, and ammonia oxidation reactions. The review closes by describing the prospects and challenges for MOF–NP-based electrocatalysts in nitrogen electrochemistry applications.</div></div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"5 6","pages":"Article 100378"},"PeriodicalIF":36.6,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145340504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
eSciencePub Date : 2025-11-01Epub Date: 2025-04-03DOI: 10.1016/j.esci.2025.100406
Haoxiang Sun , Youxuan Ni , Xinyao Wu , Dongjie Shi , Zhenhua Yan , Kai Zhang , Fangyi Cheng , Weiwei Xie , Wei Zhang , Jun Chen
{"title":"Single-dopant long-range stabilization in long-cycled Li-rich layered cathodes via trace tetrahedral-site doping","authors":"Haoxiang Sun , Youxuan Ni , Xinyao Wu , Dongjie Shi , Zhenhua Yan , Kai Zhang , Fangyi Cheng , Weiwei Xie , Wei Zhang , Jun Chen","doi":"10.1016/j.esci.2025.100406","DOIUrl":"10.1016/j.esci.2025.100406","url":null,"abstract":"<div><div>Migration of transition metal (TM) ions out of the TM layer is detrimental and unavoidable in lithium-rich layered oxides, which drives in-plane cation migration, O<sub>2</sub> release and energy loss. Since out-of-plane migration generally occurs through tetrahedral interstices (T<sub>Li</sub>) in the Li layer, doping T<sub>Li</sub> sites has been believed as a promising way to block migration pathways at the dopant site. However, with only trace dopants (<1 at.%) sparsely distributed in bulk, the ability of isolated dopants to suppress cation disorder in undoped regions remains unknown—largely due to no suitable model materials. Here, combining atomic-scale imaging, X-ray diffraction measurements and first-principles calculations, we demonstrate that W<sup>6+</sup> ions (0.75 at.%) can occupy T<sub>Li</sub> sites in Li<sub>1</sub><sub>·</sub><sub>2</sub>Mn<sub>0·6</sub>Ni<sub>0·2</sub>O<sub>2</sub>. T<sub>Li</sub>-site doping maximizes dopant efficiency, as each single W<sup>6+</sup> ion exerts a long-range Coulomb repulsion on TM/Li<sup>+</sup> ions in the TM layer, suppressing both in-plane and out-of-plane cation migration over a broad range (∼2 nm diameter), in contrast to local stabilization via other doping techniques. Remarkably, cation ordering is preserved for over 250 cycles, far exceeding the limited structural stability (∼50 cycles) typically achieved with conventional modification strategies. Consequently, O<sub>2</sub> release and formation of low-voltage Mn<sup>3+</sup>/Mn<sup>4+</sup> redox couple are inhibited, resulting in negligible voltage decay.</div></div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"5 6","pages":"Article 100406"},"PeriodicalIF":36.6,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145366120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Metal ion-bonded two-dimensional framework non-Van der Waals sandwich heterojunctions for fast mass transfer in flexible in-plane micro-supercapacitors","authors":"Xiaoyang Xu , Zhenni Zhang , Zihao Zhang , Xiaomi Tang , Hong Chen , Tian Li , Jia Zhang , Qingliang Feng , Shanlin Qiao","doi":"10.1016/j.esci.2025.100404","DOIUrl":"10.1016/j.esci.2025.100404","url":null,"abstract":"<div><div>Two-dimensional (2D) reticular framework films featuring highly accessible surface areas, tunable active sites, and well-defined channels are promising candidates for flexible in-plane micro-supercapacitor (MSC) electrodes. However, the interlayer Van der Waals forces in 2D heterojunctions can limit mass/charge transport. Herein, we design a non-Van der Waals force bonded heterojunction of covalent organic frameworks (COFs) and metal–organic frameworks (MOFs) linked by metal-ion coordination. A COF@MOF monolithic nanofilm is constructed by growing MOF (M<sub>3</sub>(HHTP)<sub>2</sub>) <em>in situ</em> on the COF (COF<sub>TD</sub>) surface, using nickel (Ni) as the optimal metal to connect the two layers and form a sandwich electrode. We further explore various transition metals in M<sub>3</sub>(HHTP)<sub>2</sub>, from manganese (Mn) to zinc (Zn), to adjust the electronic structure and charge redistribution. The optimal MSC-Ni-COF<sub>TD</sub>@Co<sub>3</sub>(HHTP)<sub>2</sub> device exhibits an impressive specific capacitance (1645.3 F cm<sup>−3</sup> at 10 mV s<sup>−1</sup>), a high energy density (146.3 mWh cm<sup>−3</sup>), as well as superior cycling and bending stability. This work offers an innovative perspective on overcoming the mass transfer and electron migration limitations of 2D reticular frameworks for miniaturization and wearable energy storage electronics.</div></div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"5 6","pages":"Article 100404"},"PeriodicalIF":36.6,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145366121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
eSciencePub Date : 2025-11-01Epub Date: 2025-07-23DOI: 10.1016/j.esci.2025.100455
Xueting Hu , Guojun Lai , Yangyang Liu , Peng Zhou , Bingan Lu , Zeinhom M. El-Bahy , Manal S. Ebaid , Lina Chen , Jiang Zhou
{"title":"Design of dual-electrode interfacial kinetics regulator for long-lasting Ah-level zinc-iodine batteries","authors":"Xueting Hu , Guojun Lai , Yangyang Liu , Peng Zhou , Bingan Lu , Zeinhom M. El-Bahy , Manal S. Ebaid , Lina Chen , Jiang Zhou","doi":"10.1016/j.esci.2025.100455","DOIUrl":"10.1016/j.esci.2025.100455","url":null,"abstract":"<div><div>Zinc-iodine (Zn–I<sub>2</sub>) batteries hold great promise for large-scale applications, yet their practical deployment is constrained by uncontrollable iodine conversion, polyiodide shuttling, and unpredictable zinc (Zn) depositional morphology. Furthermore, the mismatched kinetics of its interfacial reactions demand significant attention. Herein, we introduce a betaine (Bet) additive as a dual-electrode interfacial regulator to synergistically address the challenges faced at both the anode and cathode interface. Specifically, the hydrophilic group (–COO) of Bet preferentially adsorbs on the Zn anode surface, modulating Zn<sup>2+</sup> solvation and electrodeposition dynamics to enable highly uniform Zn plating, extending the Zn–Zn symmetric cell lifespan beyond 7000 h at 1 mA cm<sup>−2</sup>. Moreover, Bet's lipophilic group (–N–R<sub>3</sub>) interacts with polyiodides, suppressing their migration and accelerating iodine redox kinetics, thereby mitigating cathodic side reactions. Consequently, Zn–I<sub>2</sub> full-cell demonstrates exceptional cycle life, maintaining capacity with an ultralow decay rate of 0.007‰ per cycle over 15,500 cycles at 10 mA cm<sup>−2</sup>. Furthermore, an Ah-level pouch cell of ∼1.15 Ah can deliver a competitive capacity retention of 92.1% after 600 cycles, highlighting the scalability of this approach. This cost-effective and efficient interfacial modulation strategy offers a new perspective for realizing long-cycle Zn–I<sub>2</sub> batteries and advancing their practical applications.</div></div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"5 6","pages":"Article 100455"},"PeriodicalIF":36.6,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145425511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
eSciencePub Date : 2025-11-01Epub Date: 2025-03-25DOI: 10.1016/j.esci.2025.100403
Zhiang Hu , Han Wu , Xue Yong , Geoffrey I.N. Waterhouse , Zhiyong Tang , Junbiao Chang , Jiangwei Chang , Siyu Lu
{"title":"Advances in dual-site mechanisms for designing high-performance oxygen evolution electrocatalysts","authors":"Zhiang Hu , Han Wu , Xue Yong , Geoffrey I.N. Waterhouse , Zhiyong Tang , Junbiao Chang , Jiangwei Chang , Siyu Lu","doi":"10.1016/j.esci.2025.100403","DOIUrl":"10.1016/j.esci.2025.100403","url":null,"abstract":"<div><div>The oxygen evolution reaction (OER), owing to its low kinetics, is a major obstacle to electrochemical water-splitting, which is essential for converting sustainable energy into clean and stable hydrogen energy carriers. The growing need for high-performance electrocatalysts to meet industrial demands, along with a deepening exploration of the OER catalytic process, has led to advancements in OER catalyst design—from conventional single-site mechanisms (SSMs) to more sophisticated dual-site mechanisms (DSMs). However, DSMs, with their complex reaction pathways, still face multiple challenges in progressing towards industrial application, making a deeper understanding of these mechanisms essential. This review first examines the latest DSMs associated with the OER and compares them with conventional SSMs. On this basis, we highlight the structure–activity relationships and design principles of catalysts that align with DSMs by integrating experimental evidence with theoretical analysis. In addition, quasi in situ and in situ spectral detection techniques for DSM analysis are introduced, and the challenges and prospects for these new detection techniques are discussed.</div></div>","PeriodicalId":100489,"journal":{"name":"eScience","volume":"5 6","pages":"Article 100403"},"PeriodicalIF":36.6,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145340506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}