ACS Materials AuPub Date : 2025-07-02DOI: 10.1021/acsmaterialsau.5c00045
Gustavo Felix Bitencourt, Luana dos Santos Andrade, Wandson Lukas do Nascimento Amorim, Herich Henrique Lafayete Bastos Lima, Gabriela Tuono Martins Xavier, José Javier Sáez Acuña, Wagner Alves Carvalho, Mohamad El Roz, Thiago de Melo Lima and Dalmo Mandelli*,
{"title":"Bimetallic (Fe–Ga) Metal–Organic Frameworks for Tailoring Peroxidase-Like Activity: An Approach for Methane Partial Oxidation","authors":"Gustavo Felix Bitencourt, Luana dos Santos Andrade, Wandson Lukas do Nascimento Amorim, Herich Henrique Lafayete Bastos Lima, Gabriela Tuono Martins Xavier, José Javier Sáez Acuña, Wagner Alves Carvalho, Mohamad El Roz, Thiago de Melo Lima and Dalmo Mandelli*, ","doi":"10.1021/acsmaterialsau.5c00045","DOIUrl":"https://doi.org/10.1021/acsmaterialsau.5c00045","url":null,"abstract":"<p >Controllable methane oxidation directly into higher-value-added products under mild conditions remains a challenge due to the stability of the C–H bond. To promote methane oxidation using metal–organic frameworks, it is still necessary to explore ways of stabilizing metal active sites on MOFs due to the leaching and near-complete degradation of the catalyst after exposure to highly oxidative environments. Herein, we report a structural engineering approach based on Ga<sup>3+</sup>–Fe<sup>3+</sup> complexes in biological systems to tailor the redox-cycle activity. It was imitated by tailoring Ga<sup>3+</sup> doping into Fe-MIL-88B. Thus, novel MOFs with differing compositions of Fe and Ga were synthesized and denoted as Fe<sub><i>x</i></sub>Ga<sub><i>y</i></sub>-MOF. Chemical stability tests in water and oxidative environments confirmed that the bimetallic MOFs indeed exhibited higher stability with reduced leaching of iron sites. Fe<sub>0.3</sub>Ga<sub>0.7</sub>-MOF was demonstrated to be the most stable material while being active and was selected for further catalytic evaluations. Several parameters for the methane oxidation reaction were optimized such as mass of catalyst, temperature, pressure, and others. Fe<sub>0.3</sub>Ga<sub>0.7</sub>-MOF exhibited a productivity of 29.9, 381.9, and 90.1 μmol g<sub>cat</sub><sup>–1</sup> for methanol, formic acid, and acetic acid, respectively. Compared to the Fe-MIL-88B, the Fe<sub>0.3</sub>Ga<sub>0.7</sub>-MOF had an enhancement of 36% toward the selectivity of oxygenates and also reduced by almost 95% the undesired evolution of CO<sub>2</sub>. This material demonstrated excellent stability, retaining its catalytic activity after three cycles with only 0.1% metal leaching, highlighting the effectiveness of the stabilization method. In contrast, Fe-MIL-88B showed poor stability, with 38.3% metal leaching after the first cycle. Mechanistic insights indicated a major role of reactive oxygen species in the formation of products.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 5","pages":"831–848"},"PeriodicalIF":6.5,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsmaterialsau.5c00045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Materials AuPub Date : 2025-06-26DOI: 10.1021/acsmaterialsau.5c00043
Thanasee Thanasarnsurapong, Sourav Kanti Jana, Panyalak Detrattanawichai, Waraporn Namunmong, Wisit Hirunpinyopas, Pawin Iamprasertkun and Adisak Boonchun*,
{"title":"Accelerating Lattice Thermal Conductivity Calculations in MXenes: A Machine Learning Force Field Approach","authors":"Thanasee Thanasarnsurapong, Sourav Kanti Jana, Panyalak Detrattanawichai, Waraporn Namunmong, Wisit Hirunpinyopas, Pawin Iamprasertkun and Adisak Boonchun*, ","doi":"10.1021/acsmaterialsau.5c00043","DOIUrl":"https://doi.org/10.1021/acsmaterialsau.5c00043","url":null,"abstract":"<p >Traditionally, lattice thermal conductivity is evaluated using the phonon Boltzmann transport equation (PBTE) in combination with density functional theory (DFT) calculations. However, this approach is computationally intensive. In this study, we predicted lattice thermal conductivity of Ti<sub>2</sub>C and Ti<sub>3</sub>C<sub>2</sub> MXenes, along with their functionalized variants featuring surface terminations (O, F, OH), by using active DFT-based on-the-fly machine learning force fields (MLFF). The predicted thermal conductivities of Ti<sub>2</sub>C and Ti<sub>3</sub>C<sub>2</sub> are 73.10 and 101.15 W m<sup>–1</sup> K<sup>–1</sup>, respectively, close to previously calculated DFT values. The introduction of surface functional groups significantly reduces the lattice thermal conductivity. Furthermore, the MLFF-based predictions of lattice thermal conductivity are tens to thousands of times faster than conventional DFT calculations, dramatically accelerating the study of thermal transport in MXenes. This efficiency highlights the potential of MLFF as a powerful tool for exploring and optimizing the thermal properties of two-dimensional materials.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 5","pages":"823–830"},"PeriodicalIF":6.5,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsmaterialsau.5c00043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Materials AuPub Date : 2025-06-26DOI: 10.1021/acsmaterialsau.5c00015
Chandan Patra*, Subrata Mondal, Rupam Mukherjee and Yerumbu Nandakishora,
{"title":"Advanced Synthesis and Unique Properties of 2D Transition Metal Dichalcogenides for Realizing Next-Generation Applications","authors":"Chandan Patra*, Subrata Mondal, Rupam Mukherjee and Yerumbu Nandakishora, ","doi":"10.1021/acsmaterialsau.5c00015","DOIUrl":"https://doi.org/10.1021/acsmaterialsau.5c00015","url":null,"abstract":"<p >Transition metal dichalcogenides (TMDs) have emerged as a prominent class of two-dimensional (2D) materials, offering a tunable bandgap that addresses the limitations of graphene’s gapless nature. Their exceptional optical and electronic properties have positioned them at the forefront of both fundamental research and advanced device applications. This Review aims to provide a fundamental understanding of the vast family of 2D TMDs while highlighting recent progress in their synthesis techniques, unique properties, and multifunctional applications, particularly in the monolayer and near-monolayer regimes. A significant focus is placed on the challenges associated with emerging synthesis methods and the intriguing properties exhibited by monolayer TMDs, which enable their integration into next-generation photodetectors, optoelectronic devices, and sensors. These advancements enhance the flexibility and performance of monolayered materials, helping to overcome existing limitations.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 5","pages":"745–766"},"PeriodicalIF":6.5,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsmaterialsau.5c00015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Materials AuPub Date : 2025-06-26DOI: 10.1021/acsmaterialsau.4c00174
Huanyu Zhang, Lars P. H. Jeurgens*, Claudia Cancellieri, Jaka Sivavec, Maksym V. Kovalenko* and Kostiantyn V. Kravchyk*,
{"title":"Standardizing XPS and HAXPES Analyses of LLZO Solid-State Electrolytes and Their Reactive Compounds","authors":"Huanyu Zhang, Lars P. H. Jeurgens*, Claudia Cancellieri, Jaka Sivavec, Maksym V. Kovalenko* and Kostiantyn V. Kravchyk*, ","doi":"10.1021/acsmaterialsau.4c00174","DOIUrl":"https://doi.org/10.1021/acsmaterialsau.4c00174","url":null,"abstract":"<p >Surface contamination of Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub> (LLZO) is a significant challenge that impedes its use as a nonflammable and nontoxic solid-state electrolyte in high energy density, temperature-tolerant Li metal solid-state batteries. This work presents detailed dual-beam lab-based XPS/HAXPES analyses of the LLZO surface, complemented by studying reference samples such as Li, Li<sub>2</sub>O, LiOH, Li<sub>2</sub>CO<sub>3</sub>, La<sub>2</sub>O<sub>3</sub>, ZrO<sub>2</sub>, and La<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>. The objective is to establish baseline reference data, binding energy (BE) positions and more robust chemical shifts, for unambiguously identifying potential surface contaminants and surface reaction layers, for example, as a function of the synthesis and surface treatment conditions. Furthermore, the established procedures for the calibration and charge correction of the XPS and HAXPES energy scales are proposed, as is essential for comparing results across different laboratories and for different incident X-ray sources and spectrometer setups. While lab-based HAXPES analysis of LLZO surfaces is still at its infancy, it is proven to be a very powerful tool in addition to conventional XPS for nondestructively resolving in-depth inhomogeneities in the composition of LLZO surfaces up to probing depths in the range of 20–30 nm.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 5","pages":"785–797"},"PeriodicalIF":6.5,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsmaterialsau.4c00174","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Materials AuPub Date : 2025-06-24DOI: 10.1021/acsmaterialsau.5c00035
Fatma Aras*, Ulrich Burkhardt, Alim Ormeci, Horst Borrmann, Simone G. Altendorf, Yuri Grin and Iryna Antonyshyn*,
{"title":"Chemical Behavior of Mo2TMB2 (TM = Fe, Co, Ni) upon the Oxygen Evolution Reaction (OER)","authors":"Fatma Aras*, Ulrich Burkhardt, Alim Ormeci, Horst Borrmann, Simone G. Altendorf, Yuri Grin and Iryna Antonyshyn*, ","doi":"10.1021/acsmaterialsau.5c00035","DOIUrl":"10.1021/acsmaterialsau.5c00035","url":null,"abstract":"<p >The (electro)chemical behavior of intermetallic compounds Mo<sub>2</sub><i>TM</i>B<sub>2</sub> (<i>TM</i> = Fe, Co, Ni) under OER conditions has been investigated using electrochemical data combined with extensive bulk- and surface-sensitive material characterization. <i>In situ</i> formation of <i>TM</i>-rich amorphous layers, composed of oxides and hydroxides, accompanied by partial dissolution of molybdenum and boron, was observed for all three compounds. The degree of molybdenum and boron dissolution also influences the electronic state of <i>TM</i>s in their oxides/hydroxides formed on the surface of Mo<sub>2</sub><i>TM</i>B<sub>2</sub>. The <i>in situ</i>-formed Fe<sub>2</sub>O<sub>3</sub> and Ni(OH)<sub>2</sub> on the surface of Mo<sub>2</sub>FeB<sub>2</sub> and Mo<sub>2</sub>NiB<sub>2</sub>, respectively, are the origin of surface passivation and their OER inactivity. At the same time, the simultaneous presence of Co<sub>3</sub>O<sub>4</sub> and Co(OH)<sub>2</sub> on the surface of an OER-exposed Mo<sub>2</sub>CoB<sub>2</sub> electrode allows for the start of OER at a lower overpotential (ca. 290 mV) compared to elemental Co (ca. 370 mV), revealing better electrocatalytic activity. Extensive characterization of these materials as well as variation of the experimental conditions extends our understanding of the chemical properties of intermetallic compounds, which are of clear importance for their possible application as efficient electrocatalysts.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 4","pages":"718–731"},"PeriodicalIF":6.5,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12257420/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144643733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Materials AuPub Date : 2025-06-09DOI: 10.1021/acsmaterialsau.5c00039
Jefferson Honorio Franco, João Victor Bonaldo, Shelley D. Minteer and Adalgisa R. De Andrade*,
{"title":"Enhanced Biofuel Cells Based on a Hybrid Enzymatic/Bimetallic Composite for Complete Lactate Catalytic Electrooxidation","authors":"Jefferson Honorio Franco, João Victor Bonaldo, Shelley D. Minteer and Adalgisa R. De Andrade*, ","doi":"10.1021/acsmaterialsau.5c00039","DOIUrl":"10.1021/acsmaterialsau.5c00039","url":null,"abstract":"<p >We describe complete lactate electrooxidation in an enzymatic biofuel cell that combines the catalytic action of the bimetallic composite Ru@Pt-CNT and the enzyme oxalate oxidase (OxOx). The Ru@Pt-CNT/OxOx hybrid electrode was 2.0-fold more catalytically active than the electrode containing the bimetallic composite only. During chronoamperometric experiments, the hybrid electrode achieved a 35% higher maximum current density (2.65 ± 0.15 mA cm<sup>–2</sup>) than the Ru@Pt-CNT electrode. Electrochemical impedance spectroscopy showed that the hybrid electrode had lower charge transfer resistance than the Ru@Pt-CNT electrode, confirming that OxOx had a high affinity for lactate during the bioelectrocatalytic reaction on the electrode surface. Furthermore, 18-h long-term bulk electrolysis revealed that lactate electrooxidation at the Ru@Pt-CNT/OxOx hybrid electrode provided a total charge of 1.2 ± 0.2 C, which was 3-fold higher than the total charge generated by the Ru@Pt-CNT electrode. The lactate oxidation products generated at the hybrid electrode were detected during bulk electrolysis by chromatography, which showed that the hybrid biofilm harvested all 10 electrons from lactate, completely oxidizing it to CO<sub>2</sub>. With exceptional stability and catalytic performance, the hybrid electrode acted in the multiple catabolic steps of lactate oxidation. Overall, the interaction between Ru@Pt-CNT and OxOx enhanced the assembly of lactate biofuel cells to improve lactate electrooxidation. This could pave the way for developing efficient electronic devices with promising applications in bioelectrochemistry.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 4","pages":"732–742"},"PeriodicalIF":6.5,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12257398/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144643735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Materials AuPub Date : 2025-06-06DOI: 10.1021/acsmaterialsau.4c00171
Hanna Kuperman Benedik, Naomi Rom and Maytal Caspary Toroker*,
{"title":"The Effect of Sulfur Vacancy Distribution on Charge Transport across MoS2 Monolayers: A Quantum Mechanical Study","authors":"Hanna Kuperman Benedik, Naomi Rom and Maytal Caspary Toroker*, ","doi":"10.1021/acsmaterialsau.4c00171","DOIUrl":"10.1021/acsmaterialsau.4c00171","url":null,"abstract":"<p >Molybdenum disulfide (MoS<sub>2</sub>) monolayers are two-dimensional materials belonging to a family of materials called transition metal dichalcogenides which have been widely studied as potential semiconductors for next-generation ingredients in transistor technology. Electronic devices’ performance is largely influenced by defects, and in the case of MoS<sub>2</sub>, the most dominant defects are sulfur vacancies. The correlation between charge transport across MoS<sub>2</sub> and sulfur vacancies is complex and not trivial, and it is still unclear how the distribution of vacancies influences electronic conductivity. In this study, MoS<sub>2</sub> monolayers with various sulfur vacancies concentrations and distributions were examined using density functional theory for electronic structure properties, tight-binding (TB) theory to construct the TB Hamiltonian, nonequilibrium Green’s function formalism for transmission function calculations, and Landauer–Büttiker formalism for calculating charge transport. In addition, we employed design of experiments analysis to identify important structural features influencing the calculated current and to fit an empirical model to the results. We found that higher vacancy concentrations lead to a significant increase in electron permeability, with the best results occurring when sulfur vacancies were arranged in lines with alternating presence across both layers. The ability to predict charge transport across MoS<sub>2</sub> monolayers based on sulfur vacancy distribution can assist in the design of functional materials with desired properties, aiming to selectively apply structural defects.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 4","pages":"641–655"},"PeriodicalIF":6.5,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12257400/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144643740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Materials AuPub Date : 2025-06-02DOI: 10.1021/acsmaterialsau.5c00023
Jaya Baranwal, and , Danila Merino*,
{"title":"Forefront Strategies for Biomass Valorization: From Deconstruction to Bioplastic Production","authors":"Jaya Baranwal, and , Danila Merino*, ","doi":"10.1021/acsmaterialsau.5c00023","DOIUrl":"10.1021/acsmaterialsau.5c00023","url":null,"abstract":"<p >This Review highlights cutting-edge strategies for transforming agricultural residues into bioplastics, offering a sustainable alternative to conventional petroleum-based plastics. By focusing on the deconstruction and reassembly of nonedible agro-wastes, these methods address critical challenges such as resource competition, plastic pollution, and greenhouse gas emissions. Key techniques reviewed include biomass dissolution, hydrolysis, and thermomechanical processing, with particular emphasis on the use of greener solvents such as ionic liquids (ILs) and deep eutectic solvents (DES). These approaches demonstrate significant potential for minimizing waste, improving resource efficiency, and enabling circularity in bioplastic production. The Review also critically examines current limitations, including solvent toxicity, scalability, and economic feasibility, while identifying promising directions for future research. By integrating innovative deconstruction techniques with sustainable manufacturing practices, this work aims to unlock the full potential of agricultural residues, paving the way toward a zero-waste, biobased economy.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 4","pages":"610–631"},"PeriodicalIF":6.5,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12257379/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144643736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Materials AuPub Date : 2025-05-29DOI: 10.1021/acsmaterialsau.5c00032
Carlotta Seno, Christopher B. Whitehead, David E. Salazar Marcano, Ian Chaon and Jonathan De Roo*,
{"title":"From Kinetics to Molecular-Level Insights into Group 4 Metal Oxide Nanocrystal Synthesis","authors":"Carlotta Seno, Christopher B. Whitehead, David E. Salazar Marcano, Ian Chaon and Jonathan De Roo*, ","doi":"10.1021/acsmaterialsau.5c00032","DOIUrl":"10.1021/acsmaterialsau.5c00032","url":null,"abstract":"<p >Kinetic control is a powerful tool for traversing the chemical landscape toward the intended product. For group 4 metal oxide nanocrystals, the development of complex multimetallic heterostructures is still a challenge, partly due to the lack of kinetic and mechanistic understanding. Here, we study the reaction kinetics of the nonaqueous synthesis of titanium, zirconium, and hafnium oxide nanocrystals, from the decomposition of metal isopropoxide and metal halide, in the presence of tri-<i>n</i>-octylphosphine oxide (TOPO). The reaction rate depends on the metal: Ti ≫ Zr > Hf. While titanium follows an S<sub>N</sub>1 substitution mechanism, zirconium and hafnium follow an auto-catalyzed E1 elimination. In both cases, the reaction kinetics can be tuned by varying the amount of TOPO or the chloride content due to their impact on the electronic structure of the transition state of the rate-determining step. The proposed mechanism was shown to be consistent with kinetic modeling of the data for different metal concentrations. This deeper understanding of group 4 metal oxide nanocrystal formation will facilitate access to novel heterostructures relevant for optical, catalytic, and electronic materials.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 4","pages":"709–717"},"PeriodicalIF":6.5,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12257421/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144643737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Materials AuPub Date : 2025-05-28DOI: 10.1021/acsmaterialsau.5c00025
Pedro H. S. Borges, Natália M. Caldas, Lucas V. de Faria, Rafael M. Dornellas and Edson Nossol*,
{"title":"Nickel-Loaded 3D-Printed Electrode for In Situ Electrochemical Conversion to a Prussian Blue Analogue: Synthetic Parameter Optimization for Pseudocapacitor Applications","authors":"Pedro H. S. Borges, Natália M. Caldas, Lucas V. de Faria, Rafael M. Dornellas and Edson Nossol*, ","doi":"10.1021/acsmaterialsau.5c00025","DOIUrl":"10.1021/acsmaterialsau.5c00025","url":null,"abstract":"<p >Developing cost-effective and scalable energy storage devices is critical for advancing sustainable technologies. This study presents the fabrication of a novel 3D-printed PLA/Gr/NiHCF electrode, leveraging the benefits of additive manufacturing and a systematic factorial design of experiments (DOE) approach. The motivation stems from the need for simplified production methods that deliver high-performance materials while reducing waste and energy consumption. The electrode was synthesized through a two-step process involving 3D printing of a PLA/graphite/nickel acetate (PLA/Gr/Ni) composite followed by electrochemical conversion of nickel hexacyanoferrate (NiHCF) particles. The factorial DOE methodology optimized the composition of the PLA/Gr matrix and the electrochemical deposition conditions, ensuring a robust process with reproducible outcomes. The structural and electrochemical properties of the materials were evaluated using FTIR, Raman, SEM, EDS, CV, and EIS. The PLA/Gr/NiHCF electrode exhibited outstanding electrochemical performance, with a specific capacitance (C<sub>s</sub>) of 37.33 mF cm<sup>–2</sup> at 0.1 mA cm<sup>–2</sup> in a three-electrode system, significantly outperforming the control PLA/Gr electrode (0.58 mF cm<sup>–2</sup>). In a two-electrode symmetrical configuration, the system delivered a C<sub>s</sub> of 40.4 mF cm<sup>–2</sup> at 0.1 mA cm<sup>–2</sup>, with excellent retention (95% over 100 cycles) and reversible Coulombic efficiency (98.3%). The electrode’s pseudocapacitive behavior, driven by the surface-confined redox activity of NiHCF, was confirmed through CV and EIS analyses. The results highlight the practicality of 3D printing combined with simple electrochemical modification for producing efficient supercapacitor electrodes. This study underscores the importance of factorial DOE in optimizing material properties and establishes the PLA/Gr/NiHCF electrode as a promising candidate for scalable, sustainable energy storage applications.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 4","pages":"675–686"},"PeriodicalIF":6.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12257416/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144643738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}