ACS Applied Energy Materials最新文献

{"title":"Efficient Thiophene-Based Hole Transport Materials Containing Amide Groups as Bridges and Thiophene Derivatives as Acceptors for Perovskite Solar Cells","authors":"Abdelali Staoui,&nbsp;Abdennacer Idrissi,&nbsp;Zouhair El Fakir and Said Bouzakraoui*,&nbsp;","doi":"10.1021/acsaem.5c0009210.1021/acsaem.5c00092","DOIUrl":"https://doi.org/10.1021/acsaem.5c00092https://doi.org/10.1021/acsaem.5c00092","url":null,"abstract":"<p >Four thiophene-based organic molecules, <b>A1–A4</b>, featuring diverse thiophene central cores, triphenylamine side groups, and amide bridges, were designed as <b>D-π-A-π-D</b> type hole-transporting materials (HTMs) for use in perovskite solar cells (PSCs). The key characteristics of these HTMs were evaluated using DFT and TD-DFT methods, examining factors such as molecular planarity, frontier molecular orbitals, absorption spectra, optical emission, reorganization energy, density of states (DOS), stability, solubility, transition density matrix (TDM), and electron–hole contribution. According to our findings, the proposed HTMs demonstrated outstanding coherence in terms of charge carrier transit, dispersion, and excitation qualities that are perfectly suitable for strong hole mobility. Additionally, the results demonstrate excellent band alignment with the active perovskite layer with fitting HOMO energy levels. The acceptor anchor integration has significantly increased hole mobility in manufactured HTMs when compared to the reference named N5,N7-bis(4-(bis(4-methoxyphenyl)amino)phenyl)-2,3-dihydrothieno[3,4-<i>b</i>][1,4]dioxin-5,7-dicarboxamide <b>EDOT-(Amide-TPA)</b>_<b>2</b> (<b>AR</b>). This improvement is attributed to larger hole transfer integral values and decreased hole reorganization energy. Within the framework of produced HTMs, the transition density matrix and electron excitation analysis demonstrated stronger electronic coupling, more subtle charge carrier overlapping, and longer charge transfer lengths. In comparison to reference <b>AR</b>, this produced an excellent increase in intrinsic charge transference and a decreased exciton binding energy, which made exciton dissociation easier and reduced recombination deaths. Nonetheless, easy film formation and processability are guaranteed by a sufficient range in the dipole moment and Gibbs solvation-free energy. Our findings offer a molecular-level comprehension of creating HTM design strategies for effective photovoltaic features.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"8 8","pages":"5277–5290 5277–5290"},"PeriodicalIF":5.4,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Porous NiMoO4@NiMn-LDH Core–Shell Nanocomposites Anchored on Nickel Foam: Application in Asymmetric Supercapacitors with a High Specific Capacitance","authors":"Yang Yang,&nbsp;Yuwen Ma,&nbsp;Chao Sun,&nbsp;Chaomeng Bu,&nbsp;Yue Yan and Xianfu Li*,&nbsp;","doi":"10.1021/acsaem.4c0332010.1021/acsaem.4c03320","DOIUrl":"https://doi.org/10.1021/acsaem.4c03320https://doi.org/10.1021/acsaem.4c03320","url":null,"abstract":"<p >Transition-metal oxides (TMOs) exhibit exceptional potential as candidate materials in supercapacitor applications. Nevertheless, their actual performance falls far short of expectations due to challenges such as poor electronic conductivity, insufficient electrochemical durability, and the scarcity of active sites within TMOs. Herein, we successfully synthesized a NiMoO₄ nanorod@NiMn-LDH nanosheet core–shell structure onto nickel foam (NiMoO₄@NiMn-LDH/NF) via a straightforward two-step hydrothermal process, achieving complementary enhancement in performance. The core–shell architecture effectively shortens ion transport pathways and exposes abundant active sites, which establish a vital basis for boosting the energy storage efficiency of devices. Additionally, the notable synergistic effect among transition-metal ions further boosts the electrochemical performance. Consequently, the NiMoO₄@NiMn-LDH/NF electrode exhibits an impressive areal capacitance of 9438.4 mF cm⁻² under 2 mA cm^–2. Moreover, it features pre-eminent rate capability and preserves 99.9% of its capacitance over 6000 cycles. Significantly, the constructed NiMoO₄@NiMn-LDH/NF//activated carbon configuration achieves a 1.2 mW h cm^–2 high energy density under a 3.2 mW cm^–2 power density, sustaining 95% superior capacitance retention over 7000 cycles. Our research demonstrates that the NiMoO₄@NiMn-LDH core–shell nanocomposite offers an excellent and feasible strategy for the energy storage field.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"8 8","pages":"5110–5122 5110–5122"},"PeriodicalIF":5.4,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quenching-Induced LaxCayNiO3−δ Multifunctional Integrated Structure Realizes High-Nickel Cathode Material with High Cutoff Voltage and High Cycling Stability","authors":"Zhiwei Yang,&nbsp;Pan Yang,&nbsp;Yun Deng,&nbsp;Xinxiong Zeng,&nbsp;Qingchao Zeng,&nbsp;Nuonan Zhong,&nbsp;Hua Wang,&nbsp;Jintian Luo and Xianfa Rao*,&nbsp;","doi":"10.1021/acsaem.5c0044210.1021/acsaem.5c00442","DOIUrl":"https://doi.org/10.1021/acsaem.5c00442https://doi.org/10.1021/acsaem.5c00442","url":null,"abstract":"<p >High-nickel layered oxide LiNi_<i>x</i>Co_<i>y</i>Mn_{1-<i>x</i>-<i>y</i>}O₂ (NCM, <i>x</i> ≥ 0.8) materials are considered optimal cathodes for lithium-ion power batteries owing to their high energy density, commendable cycling performance, and cost-effectiveness. However, structural collapse and interface instability during cycling result in diminished cycling stability, significantly hindering their commercial viability. Consequently, this study proposes inducing a multifunctional integrated structure via the quenching process, successfully synthesizing a modified NCM cathode with an inner La/Ca-doped layered structure and a near-surface Li-deficient La_<i>x</i>Ca_<i>y</i>NiO_3−δ structure. A series of tests, complemented by density functional theory (DFT) calculations, demonstrated that inner La/Ca doping effectively increases the lattice spacing, enhancing the Li⁺ diffusion coefficient and lattice stability. The external La_<i>x</i>Ca_<i>y</i>NiO_3-δ structure offers a stable interface and abundant oxygen vacancies, significantly suppressing side reactions and oxygen evolution reactions at the interface. More importantly, DFT calculations analyzed the doping preference of La³⁺/Ca²⁺ in NCM, revealing that La³⁺/Ca²⁺ predominantly occupy Li sites, with some La³⁺ also occupying Ni sites, which further confirming the feasibility of ion exchange. Additionally, electronic effects of La 3d and Ca 2p orbitals effectively enhance the electrical conductivity of NCM cathodes. Subsequent electrochemical tests demonstrated that the multifunctional integrated structure significantly enhanced the rate performance and cycling stability of high-nickel NCM cathodes. At a 4.3 V cutoff voltage, the LCNCM cathode exhibited significant improvements in cycling stability at 0.5, 1.0, and 2.0C rates. Even at the higher cutoff voltage of 4.4 V, the LCNCM cathode maintained a reversible capacity of 185.0 mAh g^–1 and a capacity retention rate of 89.7% after 100 cycles at 1.0C, demonstrating substantial improvements in electrochemical performance.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"8 8","pages":"5388–5402 5388–5402"},"PeriodicalIF":5.4,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Active Organic Polymer-Intercalated Vanadium Oxide Enabled Dual-Active High-Performance Cathode Materials for Aqueous Zinc-Ion Batteries","authors":"Zongyang Li,&nbsp;Yan Zhang,&nbsp;Libin Zhang,&nbsp;Jiajun Li,&nbsp;Zhihao Wang,&nbsp;Xin Wang,&nbsp;Kun Ding*,&nbsp;Haimei Liu* and Yonggang Wang*,&nbsp;","doi":"10.1021/acsaem.5c0043310.1021/acsaem.5c00433","DOIUrl":"https://doi.org/10.1021/acsaem.5c00433https://doi.org/10.1021/acsaem.5c00433","url":null,"abstract":"<p >Vanadium oxides have garnered considerable interest as cathode materials in aqueous zinc-ion batteries owing to their high theoretical specific capacity. Nevertheless, the inherent instability of the layered structure and sluggish kinetics of vanadium oxide limit its broader application. Small-molecule intercalation has emerged as an effective strategy to enhance both structural stability and electrochemical performance. However, most intercalated molecules are electrochemically inactive, leading to a reduction in the overall capacity of the host vanadium oxide, thus compromising its performance. In this study, poly(catechol) (PCL), a polymer with active functional groups, is successfully intercalated into the layers of V₂O₅ (VO) via a one-step hydrothermal synthesis method. During this hydrothermal process, the phenolic hydroxyl groups of PCL are oxidized by hydrogen peroxide to carbonyl groups (C–OH → C═O), introducing active sites that can interact with Zn²⁺ ions, thus enhancing the overall electrochemical capacity of the composite material. Moreover, the intercalation of PCL not only increases the interlayer spacing of VO but also serves as a ″pillar″ that stabilizes the crystal structure, significantly improving Zn²⁺ ion diffusion kinetics and the overall zinc storage performance of the electrode material. As a result, the intercalated composite material VO-PCL exhibits good electrochemical performance, delivering a specific capacity of 466.4 mAh g^–1 at 0.1 A g^–1 and 221.9 mAh g^–1 even at a high current density of 5 A g^–1, with a capacity retention of 70.6% after 1,100 cycles. This study offers a valuable approach for utilizing organic polymers to intercalate inorganic materials, effectively contributing additional capacity and enhancing overall performance.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"8 8","pages":"5442–5454 5442–5454"},"PeriodicalIF":5.4,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrocatalytic Activity of Multifunctional Mn-Doped SrFeO3-δ/Ti-MXene Nanohybrid for Efficient Overall Water Splitting","authors":"Saravanan Kartigueyane,&nbsp;Arunachala Kumar S.P,&nbsp;Mohamad S. AlSalhi,&nbsp;Saradh Prasad Rajendra,&nbsp;Insik In,&nbsp;Seung Jun Lee*,&nbsp;Chao Yan* and Subramania Angaiah*,&nbsp;","doi":"10.1021/acsaem.4c0307010.1021/acsaem.4c03070","DOIUrl":"https://doi.org/10.1021/acsaem.4c03070https://doi.org/10.1021/acsaem.4c03070","url":null,"abstract":"<p >Toward the global pursuit of a clean and sustainable future, hydrogen (H₂) is emerging as a promising clean energy carrier for increasing energy demands. From various techniques of H₂ production, electrochemical water splitting has gained significant attention due to its zero-carbon footprint. However, a critical obstacle lies in developing cost-effective, eco-friendly, and stable catalysts with remarkable electrocatalytic performance for HER and OER. Among various electrocatalysts, perovskite oxides (ABO₃) offer better performance for the OER due to their tunable crystal structure and compositional versatility. Similarly, MXenes, with their unique properties, are emerging as efficient catalyst supports but face challenges like low oxidation resistance, restacking, and limited intrinsic active sites. Herein, we report a Mn-doped SrFeO_3-δ perovskite decorated on Ti-MXene as a bifunctional electrocatalyst. The hybrid structure synergistically enhances redox activity, achieving a current density of 20 mA cm^–2 at low overpotentials of 303 mV (OER) and 163 mV (HER), with Tafel slopes of 48.07 and 101.55 mV dec^–1, respectively. The catalyst demonstrates excellent durability, is able to maintain 45 h, and operates at an overall cell voltage of 1.75 V. These findings validate the potential of perovskite-MXene nanohybrids as cost-effective and robust catalysts for green hydrogen production via water splitting, paving the way for sustainable energy technologies.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"8 8","pages":"5004–5016 5004–5016"},"PeriodicalIF":5.4,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and Hydrogen Storage Properties of Mg-Based Complex Hydrides with Multiple Transition Metal Elements","authors":"Evans Pericoli,&nbsp;Alessia Barzotti,&nbsp;Raffaello Mazzaro,&nbsp;Romain Moury,&nbsp;Fermin Cuevas and Luca Pasquini*,&nbsp;","doi":"10.1021/acsaem.4c0287110.1021/acsaem.4c02871","DOIUrl":"https://doi.org/10.1021/acsaem.4c02871https://doi.org/10.1021/acsaem.4c02871","url":null,"abstract":"<p >Mg₂TMH_n complex hydrides, where TM represents various combinations of transition metals, were synthesized by reactive ball milling of Mg and TM powders under H₂ pressure. TM was an equimolar mixture of three (Fe, Co, and Ni), four (Mn, Fe, Co, and Ni), or five (Cr, Mn, Fe, Co, and Ni) elements. The Mg/TM ratio was either 2:1 or 3:1. For 2:1 samples, a single fcc hydride phase Mg₂TMH_n with a K₂PtCl₆-type structure was detected by X-ray diffraction along with a residual, unreacted metal phase. By contrast, in samples where the Mg/TM ratio was 3:1, the tetragonal MgH₂ hydride was also observed. The formation of Mg₃TMH_n complex hydrides, previously reported for TM = Cr and Mn under high-pressure conditions, was not detected. The maximum hydrogen content in the as-milled state was about 5 wt% for samples with a 3:1 Mg/TM ratio as determined by temperature-programmed desorption. The as-milled hydrides exhibited similar onset temperatures for desorption independently of the TM composition, suggesting no destabilization induced by elements like Mn and Cr that are known to form only unstable, high-pressure hydrides. The reversible hydrogen storage, investigated by pressure–composition isotherms in a Sieverts-type apparatus, arises from both the Mg-MgH₂ and the Mg₂TM-Mg₂TMH_n transformations. Within the 0.1–20 bar and 285–320 °C window, the samples with a 3:1 Mg/TM ratio exhibit a reversible gravimetric capacity in the 3.7–4.2 wt% range depending on TM composition, while those with a 2:1 ratio are in the 3.0–3.2 wt% range. The decreased reversible capacity compared to the initial hydrogen content was associated with the phase segregation of the transition metals, particularly Cr and Mn, which was highlighted by X-ray diffraction and transmission electron microscopy with nanoscale microanalysis.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"8 8","pages":"4993–5003 4993–5003"},"PeriodicalIF":5.4,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsaem.4c02871","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boosting Synergistic Methanol Oxidation and Hydrogen Evolution via MnO2-Decorated Ni3Se2/NF Heterojunction Catalysts for Low-Voltage Water Splitting","authors":"Xiaojun Qin,&nbsp;Fozia Sultana,&nbsp;Tongtong Li,&nbsp;Peng Zhang,&nbsp;Meijie Shi,&nbsp;Kaicheng Qian,&nbsp;Tong Wei,&nbsp;Zhixue Li,&nbsp;Jianming Bai* and Renhong Li*,&nbsp;","doi":"10.1021/acsaem.5c0012510.1021/acsaem.5c00125","DOIUrl":"https://doi.org/10.1021/acsaem.5c00125https://doi.org/10.1021/acsaem.5c00125","url":null,"abstract":"<p >The anodic oxygen evolution reaction (OER) is characterized by intrinsically slow kinetics, constituting a fundamental bottleneck that restricts the overall efficiency of conventional water electrolysis systems. To address this challenge, we investigate methanol oxidation as a viable alternative to the OER for the anodic reaction, reducing energy input requirements. Here, we report the synthesis of a self-supported heterojunction catalyst, MnO₂@Ni₃Se₂/NF, engineered via heterogeneous interface modification. The integrated Ni₃Se₂/MnO₂ heterostructures demonstrate bifunctional catalytic synergy for selective methanol oxidation and hydrogen evolution. The complementary electronic configurations between Ni₃Se₂ and MnO₂ synergistically regulate intermediate adsorption energetics, while interfacial charge redistribution facilitates the in situ generation of catalytically active high-valent Ni species. As a result, the optimized MnO₂@Ni₃Se₂/NF electrode demonstrates enhanced charge transfer kinetics and reduced activation barriers, delivering a methanol oxidation current density of 100 mA cm^–2 at 1.36 V. Moreover, in a coelectrolysis system, the catalyst enables simultaneous hydrogen evolution and methanol oxidation, achieving overall water splitting (OWS) with a current density of 100 mA cm^–2 at a lower input voltage of 1.60 V with sustained operational stability exceeding 100 h. This highlights the high energy conversion efficiency of methanol-assisted hydrogen production and demonstrates its significant potential for sustainable hydrogen generation.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"8 8","pages":"5153–5165 5153–5165"},"PeriodicalIF":5.4,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ni(OH)2/CoWO4 S-Scheme Heterojunction for Enhanced Photocatalytic Hydrogen Evolution","authors":"Jiaxiao Wang,&nbsp;Songcan He,&nbsp;Xinxin Zhou,&nbsp;Weiqi Yang,&nbsp;Jiayue Liu and Xin Guo*,&nbsp;","doi":"10.1021/acsaem.5c0035710.1021/acsaem.5c00357","DOIUrl":"https://doi.org/10.1021/acsaem.5c00357https://doi.org/10.1021/acsaem.5c00357","url":null,"abstract":"<p >The primary focus has traditionally been noble-metal-free photocatalytic hydrogen evolution (PHE) research. Transition metal-layered hydroxides usually exhibit excellent redox performance. Herein, we synthesized flower-like Ni(OH)₂ with layered structure via a simple hydrothermal method and loaded CoWO₄ nanoparticles on it. The Ni(OH)₂/CoWO₄ photocatalyst with an S-scheme heterojunction was successfully constructed. During the 4 h photocatalytic evaluation test, the hydrogen generation rate of Ni(OH)₂/CoWO₄-15 reached 3329.83 μmol g^–1 h^–1, which was significantly higher compared to pure Ni(OH)₂ (584.13 μmol g^–1 h^–1) and CoWO₄ (1358.33 μmol g^–1 h^–1), exhibiting a respective increase of 5.70 and 2.45 times. The charge transfer mechanism of the S-scheme heterojunction was confirmed through <i>in situ</i> X-ray photoelectron spectroscopy. By achieving a high redox potential and efficiently accelerating the separation of photogenerated electron–hole pairs, the S-scheme heterojunction enhances photocatalytic performance. This work provides insights into the rational design of nickel-based photocatalysts.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"8 8","pages":"5343–5352 5343–5352"},"PeriodicalIF":5.4,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unusual In-Electrolyte Stability of Doped Molybdenum Sulfide in pH Universal Hydrogen Evolution Reaction Conditions","authors":"Bhavya Rajan,&nbsp;Anshid Kuttasseri,&nbsp;Ram Kumar*,&nbsp;Nasrin Navas,&nbsp;Arup Mahata* and Indranil Mondal*,&nbsp;","doi":"10.1021/acsaem.5c0020210.1021/acsaem.5c00202","DOIUrl":"https://doi.org/10.1021/acsaem.5c00202https://doi.org/10.1021/acsaem.5c00202","url":null,"abstract":"<p >With a layered structure, molybdenum disulfide (MoS₂) has become a prudent alternative to platinum in hydrogen evolution reactions (HERs). In particular, choosing the 2H crystal phase is known to be advantageous because of its thermodynamic stability, even though it is catalytically less active phase. This demands a more rational approach to facilitate the electronic properties and understanding of the in-reaction phase stability rather than developing a new catalyst. Here, a vanadium (V)-doped 2H-MoS₂ solid-solution cathode material is prepared for activity and phase stability screening under pH universal conditions. The cathodic preconditioning shows a substantial change in the phase after alkaline and neutral HERs but not in acidic HER. The catalytic activity follows an order of acidic &gt; alkaline &gt; neutral. The performance stability is poor in a neutral medium, which shows a monotonic decrease over 24 h, which is not the case for acidic and alkaline media. The local charge transfer effect of V⁴⁺ doping and its impact on the HER are discussed using theoretical calculations. This study does not aim to provide an explicit idea of activity performance but rather gives a standard but easy protocol to investigate the catalytically active phase.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"8 8","pages":"5251–5258 5251–5258"},"PeriodicalIF":5.4,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrafast Transparent Defogger Based on High-Quality Graphene Film Directly Grown via Copper Vapor-Assisted Method","authors":"Junlei Liu,&nbsp;Hongying Yang,&nbsp;Zhen Su,&nbsp;Xin Zhang,&nbsp;Huiwen Ren,&nbsp;Yuqing Tian,&nbsp;Yuming Feng,&nbsp;Yanan Ding,&nbsp;Linben Ling,&nbsp;Yibo Feng,&nbsp;Xiaolei Chen and PingAn Hu*,&nbsp;","doi":"10.1021/acsaem.5c0036410.1021/acsaem.5c00364","DOIUrl":"https://doi.org/10.1021/acsaem.5c00364https://doi.org/10.1021/acsaem.5c00364","url":null,"abstract":"<p >Graphene has been a significant candidate to achieve high-performance transparent defoggers as conductive thermogenic layers due to its high transmittance and conductivity. However, the low-temperature synthesis of high-quality graphene defoggers remains challenging due to incomplete carbon precursor decomposition and weak interfacial adhesion. Herein, we report a transparent defogger based on graphene film directly grown on oxide substrates (e.g., SiO₂, Al₂O₃) via a copper-assisted plasma-enhanced chemical vapor deposition method at 800 °C. This strategy enhances catalytic activity and minimizes defects without requiring post-transfer processes, and the as-prepared graphene exhibits excellent homogeneity and high quality at a large scale. The defogger based on graphene film represents a lower heat transfer coefficient (<i>h</i> = 14.4 W m^–2 °C^–1), which means excellent electrothermal properties, and achieves ultrafast defogging within 17.6 s at 30 V with a 3 × 3 cm² defogger. Finite element analysis revealed efficient heat distribution and utilization, demonstrating the superior electrothermal performance of this defogging system. This work highlights the potential of graphene-based defoggers for applications such as rearview mirror defogging, smart windows, and other future technologies.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"8 8","pages":"5334–5342 5334–5342"},"PeriodicalIF":5.4,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}