Electrochemistry Communications最新文献

A simple and effective catalyst recovery protocol for H2-PEMFCs 简单有效的 H2-PEMFC 催化剂回收方案

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-04-10 DOI: 10.1016/j.elecom.2025.107929

Marc Ayoub , Rohit Rajendran Menon , Simon Thiele , Matthew Brodt

{"title":"A simple and effective catalyst recovery protocol for H2-PEMFCs","authors":"Marc Ayoub , Rohit Rajendran Menon , Simon Thiele , Matthew Brodt","doi":"10.1016/j.elecom.2025.107929","DOIUrl":"10.1016/j.elecom.2025.107929","url":null,"abstract":"<div><div>Catalyst degradation in the cathode electrode for H<sub>2</sub>-PEM (hydrogen proton-exchange membrane) fuel cells is a crucial topic to tackle to achieve high durability and efficiency. Despite ongoing research, a concurrently fast, easy-to-adapt, and effective recovery protocol is still missing. In this study, we report a fast and easy-to-adapt recovery protocol that significantly mitigates the negative effects associated with catalyst degradation for the cathode electrode in H<sub>2</sub>-PEMFCs. Following accelerated stress tests (AST) of 30,000-cycles, membrane-electrode assemblies (MEAs) using our new recovery protocol exhibit remarkable higher end-of-life performance compared to similar MEAs subjected to the same AST but utilizing the DOE-defined recovery protocol. The end-of-life differences for the new recovery protocol are over 100 % increase in power density at 0.6 V and around 26 % increase at peak power density. By analyzing performance, the Tafel slope, the electrochemical surface area (ECSA), and impedance data, the improvements are traced back to better catalyst recovery and thus improved performance at end-of-life.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"176 ","pages":"Article 107929"},"PeriodicalIF":4.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insight into structural, Opto-electronic and elastic properties of lead-free double perovskites Cs2TlInX6 (X = Cl, Br and I) for optoelectronic applications: A first principles calculations 深入研究用于光电应用的无铅双包晶石 Cs2TlInX6（X = Cl、Br 和 I）的结构、光电和弹性特性：第一原理计算

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-04-10 DOI: 10.1016/j.elecom.2025.107930

Nimra Ehsan , Tasawer Shahzad Ahmad , Mian HR Mahmood , Salhah Hamed Alrefaee , Naseem Akhter , Tatyana Orlova , Vineet Tirth , Ali Algahtani , Amnah Mohammed Alsuhaibani , Moamen S. Refat , Abid Zaman

{"title":"Insight into structural, Opto-electronic and elastic properties of lead-free double perovskites Cs2TlInX6 (X = Cl, Br and I) for optoelectronic applications: A first principles calculations","authors":"Nimra Ehsan , Tasawer Shahzad Ahmad , Mian HR Mahmood , Salhah Hamed Alrefaee , Naseem Akhter , Tatyana Orlova , Vineet Tirth , Ali Algahtani , Amnah Mohammed Alsuhaibani , Moamen S. Refat , Abid Zaman","doi":"10.1016/j.elecom.2025.107930","DOIUrl":"10.1016/j.elecom.2025.107930","url":null,"abstract":"<div><div>In recent years, lead-free double perovskites have gained attention due to their potential in optoelectronics. This study investigates the structural, electronic, mechanical and optical properties of Cs<sub>2</sub>TlInX<sub>6</sub> (X = Cl, Br, I) using first-principles calculations. Structural optimizations reveal increasing lattice constants (11.05 Å −12.28 Å) with larger anions, while band structure analysis indicates indirect band gaps of 3.52 eV, 2.49 eV and 1.45 eV for Cl, Br, and I variants suitable for visible to ultra-visible applications. Mechanical analysis confirms structural stability with Cs<sub>2</sub>TlInCl<sub>6</sub> exhibiting the highest bulk modulus (28.3 GPa) and Cs<sub>2</sub>TlInI<sub>6</sub> demonstrating enhanced flexibility. Optical assessments show significant light absorption with Cs<sub>2</sub>TlInI<sub>6</sub> possessing the highest dielectric constant (4.05). These findings highlight the potential of Cs<sub>2</sub>TlInX<sub>6</sub> as stable, tunable, and highly absorptive materials, making them promising candidates for next-generation photovoltaic and optoelectronic applications.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"176 ","pages":"Article 107930"},"PeriodicalIF":4.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vanadium disulfide-modified lithium aluminum titanium phosphate/polymethyl methacrylate composite separator with hierarchical interface architecture for advanced lithium-sulfur batteries: A synergistic strategy for enhanced electrochemical performance and interfacial stability

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-04-08 DOI: 10.1016/j.elecom.2025.107926

PeiHua Wang , Wendong Chen , Kai Qu

{"title":"Vanadium disulfide-modified lithium aluminum titanium phosphate/polymethyl methacrylate composite separator with hierarchical interface architecture for advanced lithium-sulfur batteries: A synergistic strategy for enhanced electrochemical performance and interfacial stability","authors":"PeiHua Wang , Wendong Chen , Kai Qu","doi":"10.1016/j.elecom.2025.107926","DOIUrl":"10.1016/j.elecom.2025.107926","url":null,"abstract":"<div><div>Lithium‑sulfur batteries have attracted significant attention as next-generation energy storage solutions due to their exceptional theoretical energy density (2600 Wh/kg) and economic viability. However, two fundamental challenges have hindered their practical application: the formation of lithium dendrites at the anode interface, which compromises safety and longevity, and the “shuttle effect” of polysulfide intermediates at the cathode, resulting in capacity deterioration and compromised cycling performance.</div><div>This study presents an innovative bifunctional separator design that simultaneously addresses these critical limitations through interface engineering. The separator architecture features a rationally designed vanadium disulfide (VS₂) composite layer functionalized with boron nitride nanosheets at the anode interface, which effectively suppresses dendrite nucleation and growth. Concurrently, at the cathode interface, a lithium aluminum titanium phosphate/polymethyl methacrylate/polyvinylidene fluoride (LATP/PMMA/PVDF) composite structure has been engineered to enable effective polysulfide confinement and enhance electrochemical reaction kinetics.</div><div>This bifunctional separator demonstrates excellent electrochemical performance, achieving a specific capacity of 677.8 mAh g<sup>−1</sup> at 2C rate while maintaining exceptional cycling stability over 800 cycles. These results represent a significant advancement toward the commercial realization of high-performance lithium‑sulfur batteries.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"175 ","pages":"Article 107926"},"PeriodicalIF":4.7,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Copper (II) anchored on guanidine-functionalized graphene oxide as a high-performance supercapacitor electrode: An experimental and theoretical investigation

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-04-05 DOI: 10.1016/j.elecom.2025.107927

Samira Mohammadi , Seyed Morteza Mousavi-Khoshdel , Mohammad Ali Hedayati

{"title":"Copper (II) anchored on guanidine-functionalized graphene oxide as a high-performance supercapacitor electrode: An experimental and theoretical investigation","authors":"Samira Mohammadi , Seyed Morteza Mousavi-Khoshdel , Mohammad Ali Hedayati","doi":"10.1016/j.elecom.2025.107927","DOIUrl":"10.1016/j.elecom.2025.107927","url":null,"abstract":"<div><div>This study investigates a low-cost and effective supercapacitor (SC) electrode material that represents an important step toward sustainable development. For this purpose, copper (II) anchored on guanidine-functionalized graphene oxide (GGO/Cu) was synthesized via a facile two-step route. Various analytical techniques, such as Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and elemental mapping, were utilized for phase and morphology investigation of the GGO/Cu. The electrochemical performance was assessed through cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge/discharge (GCD) in the 6 M KOH electrolyte. The GGO/Cu electrode demonstrated a high specific capacitance of 1224 F g<sup>−1</sup> in the potential window of 0 to 0.45 V at the current density of 2 A g<sup>−1</sup>. The as-prepared electrode exhibited excellent cyclic stability and good capacitance retention of 68 % after 5500 cycles at the high current density of 20 A g<sup>−1</sup>. Furthermore, for theoretical studies of GGO/Cu electrode, density functional theory (DFT) calculations were employed and the results suggested the improvement of the quantum capacitance (C<sub>Q</sub>) and confirmed the experimental findings.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"175 ","pages":"Article 107927"},"PeriodicalIF":4.7,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stability of silver/silver chloride quasi-reference electrodes under gamma radiation for corrosion measurements

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-04-03 DOI: 10.1016/j.elecom.2025.107919

Anqi Shi , Emmanuel Mena-Morcillo , Taras Skotar , Reza Moshrefi , Mehran Behazin , Peter George Keech , Samantha Michelle Gateman

引用次数: 0

Implementing hydrogen oxidation reaction on Pt for controlling counter electrode processes

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-03-28 DOI: 10.1016/j.elecom.2025.107917

Caroline K. Williams, Pietro Papa Lopes

{"title":"Implementing hydrogen oxidation reaction on Pt for controlling counter electrode processes","authors":"Caroline K. Williams, Pietro Papa Lopes","doi":"10.1016/j.elecom.2025.107917","DOIUrl":"10.1016/j.elecom.2025.107917","url":null,"abstract":"<div><div>The search for active, stable, and durable materials for electrochemical energy technologies requires increasing levels of precision to establish true structure-function relationships and guide materials design from atomic and molecular scale. This increases the level of control required over the experimental system for proper materials evaluation. The choice of counter electrode material become crucial, as Pt dissolution at high voltages may cause contamination to the working electrode, especially when studying reductive processes in reactions such as oxygen reduction reaction (ORR), H<sub>2</sub> evolution reaction (HER), and the CO<sub>2</sub> reduction reaction. The learnings from “old school” electrochemistry groups lead us to leverage H<sub>2</sub> reactions over Pt to construct a counter electrode system with controlled potential that eliminates Pt ion contamination concerns. In here we discuss the construction of such Pt|H<sub>2</sub> counter electrode where key experimental aspects such as the H<sub>2</sub> flow rate and effective distribution determines the maximum current this counter electrode can accommodate before switching to high voltage and triggering Pt dissolution. Lastly, we demonstrate the use of the Pt|H<sub>2</sub> counter electrode in aqueous electrolytes during HER occurring on the working electrode at varying currents, showing that the Pt content in the cell remains below parts per trillion (ppt) up to 10 mA, and below 50 ppt at 100 mA up to 1 h of constant current hold. This work provides a guide to the implementation of Pt|H<sub>2</sub> counter electrodes to improve the precision of electrochemical experiments in search of highly active, selective, and durable materials for energy technologies.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"175 ","pages":"Article 107917"},"PeriodicalIF":4.7,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Superior electrochemical performance of CuS/FeSe2 for advanced asymmetric supercapacitor applications

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-03-26 DOI: 10.1016/j.elecom.2025.107915

Imran Khan , Danish Arif , Atta Ullah Shah , Kashif Safeen , Basit Ali , Gh. Eid , Wubshet Mekonnen Girma , Muhammad Shahid Khan , Adeel Younas Abid , Akif Safeen

{"title":"Superior electrochemical performance of CuS/FeSe2 for advanced asymmetric supercapacitor applications","authors":"Imran Khan , Danish Arif , Atta Ullah Shah , Kashif Safeen , Basit Ali , Gh. Eid , Wubshet Mekonnen Girma , Muhammad Shahid Khan , Adeel Younas Abid , Akif Safeen","doi":"10.1016/j.elecom.2025.107915","DOIUrl":"10.1016/j.elecom.2025.107915","url":null,"abstract":"<div><div>Supercapacitor devices face significant challenges, including limited energy density, high self-discharge rates, and poor performance over extended cycling. The present study developed a high-performance asymmetric supercapacitor using novel CuS/FeSe<sub>2</sub> nanocomposites fabricated using a scalable wet chemical method. The CuS/FeSe<sub>2</sub> nanocomposites exhibited exceptional electrochemical performance, including significant capacitance and redox behavior improvements. Integrating two pseudocapacitive materials in a three-electrode configuration exhibited a synergistic effect, substantially reducing resistance and surpassing individual CuS and FeSe<sub>2</sub> electrodes. The CuS/FeSe₂ nanocomposite demonstrated the highest Cs among the electrodes, achieving 821.3 Fg<sup>−1</sup> at 1 Ag<sup>−1</sup>, surpassing the performance of the individual CuS (248.3 Fg<sup>−1</sup>) and FeSe₂ (508 Fg<sup>−1</sup>) electrodes along with 80.4 % retention. The asymmetric supercapacitor (CuS/FeSe<sub>2</sub>||AC) demonstrated excellent cycling stability, retaining 90.1 % of its initial capacity after 7000 continuous charge/discharge cycles at the highest current rate. Operating at a voltage cutoff of 1.6 V in an aqueous electrolyte, it achieved a high energy density of 51.1 Wh/kg, delivering power at 2426.3 W/kg, and exhibiting a specific capacitance of 143.6 F/g. The CuS/FeSe<sub>2</sub> nanocomposite shows significant potential for high-performance energy storage devices, particularly for developing next-generation asymmetric supercapacitors.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"175 ","pages":"Article 107915"},"PeriodicalIF":4.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetic analysis of Nico electrodeposition with saccharin using electrochemical impedance spectroscopy

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-03-24 DOI: 10.1016/j.elecom.2025.107912

Jae-Ik Choi , Inyeol Park , Suyeon Park , Min Jun Yi , Wonbong Jang , Jong Hyun Seo

{"title":"Kinetic analysis of Nico electrodeposition with saccharin using electrochemical impedance spectroscopy","authors":"Jae-Ik Choi , Inyeol Park , Suyeon Park , Min Jun Yi , Wonbong Jang , Jong Hyun Seo","doi":"10.1016/j.elecom.2025.107912","DOIUrl":"10.1016/j.elecom.2025.107912","url":null,"abstract":"<div><div>The reaction kinetics of nickel‑cobalt alloy electrodeposition is investigated through Electrochemical Impedance Spectroscopy (EIS). Results revealed two primary effects of saccharin additives: reducing competition between hydrogen and metal adsorption, and inhibiting reaction by blocking active sites. At low saccharin concentrations, reduced competition led to rapid hydrogen evolution, resulting in non-uniform and rough microstructures. Conversely, saccharin's strong inhibition effect at higher concentrations yielded fine microstructures with mirror-like appearance. These microstructural changes significantly enhanced the hardness and reduced friction of the electrodeposited film. Furthermore, the suppression of hydrogen reactions stabilized the local pH during the electrodeposition, producing high-quality metallic films with reduced oxide/hydroxide impurities. This study paves the way to understand the complex interplay of electroplating additives in metallic-alloy electrodeposition to optimize microelectronics fabrication.</div></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":"175 ","pages":"Article 107912"},"PeriodicalIF":4.7,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Vanadium-doped MoSe2 Nanosheets: Induced lattice contraction and enhanced conductivity for superior hydrogen evolution reaction

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-03-22 DOI: 10.1016/j.elecom.2025.107916

Ramaraj Sukanya , Raj Karthik , Abdullah Al Mahmud , Deivasigamani Ranjith Kumar , Eswaran Kamaraj , Carmel B. Breslin , Jae-Jin Shim

引用次数: 0

In-situ electrochemical-surface enhanced Raman scattering imaging for observing pH effects on the reduction of 4-Nitrobenzenethiol

IF 4.7 3区工程技术

Electrochemistry Communications Pub Date : 2025-03-21 DOI: 10.1016/j.elecom.2025.107913

Jihae Kim , Seog Joon Yoon , Donghoon Han

引用次数: 0