Journal of Electroanalytical Chemistry最新文献

{"title":"Engineering the Co/CoO heterostructure to trigger the in-situ generation of abundant high-valent cobalt species for enhanced electroreduction of nitrate to ammonia","authors":"Jinyan Yang ,&nbsp;Ming Chen ,&nbsp;Wen-Da Zhang ,&nbsp;Jiangyong Liu ,&nbsp;Jing Wang ,&nbsp;Xiaodong Yan","doi":"10.1016/j.jelechem.2024.118737","DOIUrl":"10.1016/j.jelechem.2024.118737","url":null,"abstract":"<div><div>The CoO-based materials are promising candidates for electrochemical nitrate reduction reaction to ammonia (eNO₃RR). Herein, Zn/Co bimetallic MOFs are adopted to construct Co/CoO Schottky heterostructures, where the Co-CoO interfaces are engineered by controlling the Zn/Co ratio. The interface-optimized Co/CoO displays an NH₃ yield of 713 µmol h⁻² cm⁻² and a maximum Faradaic efficiency of 99.16 % due to the synergistic effect between CoO and Co and abundant oxygen vacancies. The more the Co-CoO interfaces, the more the <em>in</em>-<em>situ</em> generated high-valent cobalt species (CoOOH), and the higher the catalytic performance. Therefore, the high-valent cobalt species are considered the true active sites. When used as a cathode in a rechargeable Zn-NO₃⁻ battery, the Co/CoO heterostructure achieves a power density of 4.7 mW cm⁻² and an NH₃ yield of 131.7 µmol h⁻² cm⁻² with robust working stability.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"975 ","pages":"Article 118737"},"PeriodicalIF":4.1,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative investigation of composition, microstructure and property influences on electrocatalysis of two representative cathodes: BaCo0.4Fe0.4Zr0.1Y0.1O3-δ versus Ba0.5Sr0.5Co0.8Fe0.2O3-δ","authors":"Tonghuan Zhang ,&nbsp;Haolong Chen ,&nbsp;Chengzhu Xiao ,&nbsp;Peng Qiu ,&nbsp;Huiying Qi ,&nbsp;Baofeng Tu","doi":"10.1016/j.jelechem.2024.118735","DOIUrl":"10.1016/j.jelechem.2024.118735","url":null,"abstract":"<div><div>BaCo_0.4Fe_0.4Zr_0.1Y_0.1O_3-δ (BCFZY) and Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ (BSCF) perovskites are two representative high-performance cathode materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Here, symmetric cell tests demonstrate that polarization resistance values of BCFZY cathode are only 0.21–0.29 times those of BSCF cathode at 740–660 °C, and 0.21–0.26 times those of BSCF cathode at the oxygen partial pressures of 1.00–0.10 atm. Distribution of relaxation times (DRT) is applied to detect individual electrode processes overlapped in impedance spectra, which finds that the dominant processes of oxygen dissociation, subsequent species transfer and reduction on BCFZY cathode are superior to those of BSCF cathode. By temperature-programmed desorption of oxygen (O₂-TPD), thermal expansion coefficient (TEC) measurements, scanning electron micrograph (SEM) and energy dispersive spectra measurements, the strong oxygen combination ability with higher activation energy of oxygen desorption (E_d = 84 kJ mol^-1), peculiar surface state with evident nano-particle structure, more matchable TEC (19.0 × 10^-6 K⁻¹) and excellent interfacial connection with the electrolyte are observed on BCFZY cathode to account for its distinctive catalysis, as compared to BSCF cathode (E_d = 68 kJ mol^-1, TEC = 24.2 × 10^-6 K⁻¹).</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"975 ","pages":"Article 118735"},"PeriodicalIF":4.1,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Layer-by-layer WS2-Cr heterojunction as a positive working electrode material for high-performance supercapattery applications","authors":"Muhammad Zahir Iqbal ,&nbsp;Atika Bibi ,&nbsp;Asma Khizar ,&nbsp;Nacer Badi ,&nbsp;H.H. Hegazy ,&nbsp;A.A. Alahmari","doi":"10.1016/j.jelechem.2024.118738","DOIUrl":"10.1016/j.jelechem.2024.118738","url":null,"abstract":"<div><div>This study investigates the impact on the electrochemical performance of pristine sputtered WS₂ through the strategic integration of a highly conductive chromium interfacial layer. This study involves the fabrication of two different samples via magnetron sputtering: type I, WS₂-sputtered and type II, WS₂/Cr (sputtering of Cr as an interfacial layer between sputtered-WS₂ and NF). Afterward, structural, topographic and elemental composition of as-synthesized samples were inspected via XRD, SEM, Raman, and EDX. Following this, the energy storage performance were evaluated by employing CV, GCD, and EIS in three and two electrode assembly sequentially. In three electrode testing WS₂ and WS₂/Cr exhibited the specific capacity (Q_s) of 661.79 C g⁻¹ and 1600 C g⁻¹ at 3 mV s^-1 along with the capacity retention of 61.37 % (WS₂) and 83.04 % (WS₂/Cr), respectively. Similarly, through GCD WS₂ shows the Q_s of 637.34 C g⁻¹ at 0.8 A/g conversely, WS₂/Cr exhibited the Q_s of 1220 C g⁻¹ at 1.3 A g^-1. Besides, the WS₂/Cr demonstrated long-term longevity (capacity retention of 83.13 %) after 5000 GCD cycles. Based on exclusive electrochemical performance of type II of two samples, an asymmetric battery-type hybrid supercapacitor (WS₂/Cr//AC) was fabricated by incorporating WS₂/Cr and activated carbon (AC) as working and counter electrodes. WS₂/Cr//AC revealed the Q_s of 352 C g⁻¹ (785 F g^-1) at 0.7 A/g. Besides, it deliberately delivered 81 Wh kg⁻¹ and 1750 W kg⁻¹ energy and power. The device exhibits excellent cyclic stability by maintaining its capacity after 5000 GCD cycles and illustrated 87.30 % capacity retention. Following that, semi-empirical approach was applied to quantify the capacitive and diffusive currents’ contribution in overall device’s performance. The results highlight that WS₂/Cr hold colossal potential to fill the proficiency gap between presently keep-going devices and stern demands of future energy storage applications.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"975 ","pages":"Article 118738"},"PeriodicalIF":4.1,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hierarchical porous MXene film with diffusion path optimization for supercapacitor","authors":"Xuefeng Zhang ,&nbsp;Haiqin Lin ,&nbsp;Huaqing Peng ,&nbsp;Wenrui Li ,&nbsp;Ting Wang ,&nbsp;Jianpeng Li ,&nbsp;Qiancheng Xiong ,&nbsp;Yong Liu ,&nbsp;Xudong Liu","doi":"10.1016/j.jelechem.2024.118733","DOIUrl":"10.1016/j.jelechem.2024.118733","url":null,"abstract":"<div><div>MXenes have immense potential in electrochemical energy storage owing to their outstanding physicochemical properties such as their oxygen-containing groups that impart additional pseudocapacitance to acidic electrolytes. However, during electrode assembly, MXene nanosheets undergo restacking because of hydrogen bonding and van der Waals forces, which causes electrolyte ions to traverse long diffusion pathways between the long and narrow nanosheets. Exploiting the oxidative properties of Ti₃C₂T_x, a hierarchical porous MXene film with micro-, <em>meso</em>- and macroporous structures was successfully prepared using a simple hydrothermal oxidation and etching process to create micro- and mesoporous structures, followed by ice templating to prepare three-dimensional (3D) linked macroporous structures. Because these hierarchical pores have synergistic effects on electrochemical activity and electrolyte ion diffusion, the film attained a specific capacitance of 539F/g at a current density of 2 A/g when it was used as a supercapacitor electrode, which corresponds to one of the highest values reported for MXene-based electrodes. The film retained 83% of its specific capacitance when the current density was increased to 40 A/g, and exhibited excellent cycling stability. By using this multi-porous MXene design, synergistic improvement in ion diffusion was successfully realized and thus a new strategy to prepare high-performance supercapacitor electrode materials was developed.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"975 ","pages":"Article 118733"},"PeriodicalIF":4.1,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic enhancement of lithium iron phosphate electrochemical performance by organic zinc source doping and crystalline carbon layer capping","authors":"Chengyu Pan,&nbsp;Bowen Li,&nbsp;Weicheng Xie,&nbsp;Haoyan Yin,&nbsp;Yanmin Gao","doi":"10.1016/j.jelechem.2024.118716","DOIUrl":"10.1016/j.jelechem.2024.118716","url":null,"abstract":"<div><div>In this study, lithium iron phosphate (LFP) is prepared as cathode material by hydrothermal synthesis method and the combined effect of doping and capping is applied to co-modify it. We thoroughly investigate how Zn²⁺ doping and PA capping layer affect the crystal structure, microscopic morphology, and electrochemical properties of LFP cathode materials. The experimental results show that when co-modified with 5 % Zn²⁺ doping combined with 7 % PA capping layer, the resulting cathode material exhibits a discharge specific capacity of 165.5 mAh g⁻¹, and the capacity retention rate can still be maintained at a high level of 98.6 % after 200 charge–discharge cycles.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"975 ","pages":"Article 118716"},"PeriodicalIF":4.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reduced lattice spacing of birnessite type manganese dioxide/ expanded graphite cathode for stable aqueous zinc-ion batteries","authors":"Changxin Han ,&nbsp;Juanjuan Cheng ,&nbsp;Yun Ou ,&nbsp;Longfei Liu ,&nbsp;Yuxuan Xiao ,&nbsp;Shuang Du ,&nbsp;Changzhang Jian","doi":"10.1016/j.jelechem.2024.118732","DOIUrl":"10.1016/j.jelechem.2024.118732","url":null,"abstract":"<div><div>Manganese oxides (MnO_x) have attracted much attention due to abundant resource, low cost and eco-friendliness. In this study, birnessite type manganese dioxide/expanded graphite composites (KMO/EG) with a reduced lattice spacing of nanoflower and nanowire heterostructure KMO have been synthesized by a one-step hydrothermal method. The morphology of KMO has transformed from nanoflower to nanowire with a reduced lattice spacing due to nucleation sites on the surface of EG. The KMO/EG achieves a specific capacity of 444.5mAh g<strong>⁻</strong>¹ and remains at 387.9mAh g<strong>⁻</strong>¹ after 100 cycles at 0.1 A g <strong>⁻</strong>¹ for Zn-ion battery. The enhanced specific capacity of KMO/EG is mainly attributed to the capacity contribution of EG and the good stability is related to the more stable structure of KMO caused by reduced lattice spacing.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"975 ","pages":"Article 118732"},"PeriodicalIF":4.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of critical current density using micro-porous structure in a low-temperature water electrolysis","authors":"Su-Yeon Park ,&nbsp;Dong-Hyuk Park ,&nbsp;Haekyun Park ,&nbsp;Bum-Jin Chung","doi":"10.1016/j.jelechem.2024.118731","DOIUrl":"10.1016/j.jelechem.2024.118731","url":null,"abstract":"<div><div>The critical current density (CCD), which limits the hydrogen production rate was measured by forming micro-porous structures on the cathode electrode in a low-temperature water electrolysis. Several micro-porous structures were formed by the electrodeposition method varying the current density during the deposition. A maximum 54% enhancement of the CCD was recorded compared to the plain surface. With the micro-porous structures, the superior capillary wicking effect allowed the electrolyte to penetrate the structure, resulting in the increased number of hydrogen nucleation sites. The increased hydrogen nucleation sites led to the decreased hydrogen bubble size and increased departed bubble density, which delayed formation of the hydrogen film leading to the CCD. The surface morphology revealed that the multiple pore layers with the interconnected pores exhibited superior capillary wicking effect compared to the open type single pore layer. It is expected that the results of present work stimulate further research regarding electrode surface design in the low-temperature water electrolysis.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"975 ","pages":"Article 118731"},"PeriodicalIF":4.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic effects of MXene and Co3O4 in composite electrodes: High-performance energy storage solutions","authors":"Jiawei Wu ,&nbsp;Yuanqing Chen ,&nbsp;Xujiang Liang ,&nbsp;Muslum Demir ,&nbsp;Weibai Bian","doi":"10.1016/j.jelechem.2024.118720","DOIUrl":"10.1016/j.jelechem.2024.118720","url":null,"abstract":"<div><div>The development of high-performance electrode materials is crucial for advancing supercapacitor technology. The two-dimensional layered structure of MXene (Ti₃C₂T_x) presents high conductivity, abundant surface functional groups and accessible ion interaction between layers. However, the MXene suffers from the layer aggregation. To overcome this issue, we synthesized a composite material combining MXene with cobalt oxide (Co₃O₄) to enhance electrochemical performance in supercapacitors. MXene’s two-dimensional layered structure, high conductivity, and abundant surface functional groups allow for efficient ion intercalation, while Co₃O₄ contributes high theoretical capacitance and rich oxidation states. The resulted MXene/Co₃O₄ composite exhibits an impressive areal capacitance of 6.456F/cm² at a current density of 3 mA/cm², maintaining 90.52 % capacitance retention at 30 mA/cm², and 81.37 % capacity after 5000 charge–discharge cycles. Additionally, the asymmetric supercapacitor (ASC) device fabricated using the MXene/Co₃O₄ composite achieves a power density of 6.41 mW/cm² at an energy density of 0.37 mWh/cm², with 82.3 % capacitance retention after 5000 cycles. These results demonstrate that the MXene/Co₃O₄ composite material is a promising candidate for high-performance supercapacitors, offering significant improvements in rate capability and long-term cycling stability.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"975 ","pages":"Article 118720"},"PeriodicalIF":4.1,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The formation of three-dimensional phosphorus-doped MoO2/C nanostructures for high-performance aqueous zinc-ion batteries","authors":"Xiao Zhang,&nbsp;Peng Huang,&nbsp;Mengjie Li,&nbsp;Chuxin Deng,&nbsp;Shilei Xie,&nbsp;Dong Xie,&nbsp;Peng Liu,&nbsp;Min Zhang,&nbsp;Faliang Cheng","doi":"10.1016/j.jelechem.2024.118729","DOIUrl":"10.1016/j.jelechem.2024.118729","url":null,"abstract":"<div><div>MoO₂ is considered as a promising cathode for zinc ion batteries (ZIBs) due to its high electronic conductivity, high theoretical capacity, and other advantages. However, MoO₂ shows significant volume changes during ion insertion/de-insertion, leading to a decrease in battery cycling performance. In this paper, a novel P-MoO₂/C heterostructure was prepared by introducing carbon skeleton <em>in situ</em> and phosphorus doping subsequently. Due to the rigid carbon structure and oxygen vacancies, the structural degradation of MoO₂ was inhibited during the zinc ions intercalation/de-intercalation. Compared with the undoped MoO₂/C and commercial MoO₂, P-MoO₂/C demonstrates a superior cycle stability including a high initial discharge specific capacity of 197.3 mAh·g⁻¹ at 0.1A·g⁻¹ and 60.8 % capacity retention after 200 cycles at 1A·g⁻¹. This works provides a new pathway for the design of specialized structures as well as the enhancement of zinc storage capabilities of MoO_2.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"975 ","pages":"Article 118729"},"PeriodicalIF":4.1,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revisiting the role of foreign atoms in CO2 reduction on CuSn single-atom surface alloys","authors":"Vitaliy A. Kislenko ,&nbsp;Sergey A. Kislenko ,&nbsp;Victoria A. Nikitina","doi":"10.1016/j.jelechem.2024.118718","DOIUrl":"10.1016/j.jelechem.2024.118718","url":null,"abstract":"<div><div>The electrochemical <span><math><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> reduction is a promising process for capturing the emitted carbon dioxide by converting <span><math><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> into value-added chemicals. Although copper-based catalysts have a unique ability to produce multi-carbon products, they suffer from poor selectivity. Copper-based alloys and, in particular, single atom alloys, hold promise for fine-tuning the selectivity of <span><math><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> reduction reaction. In this study, we applied the grand canonical density functional theory in combination with the implicit solvent to model <span><math><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> electroreduction with the formation of CO and <span><math><msup><mrow><mi>HCOO</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span> on copper and highly diluted copper-tin alloys. We demonstrate that the insertion of a substitutional Sn atom introduces a destabilization effect for all intermediates and completely disrupts the adsorption positions of the CO, H, and H/<span><math><msub><mrow><mi>CO</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> co-adsorption. However, the influence of Sn on intermediate adsorption energies is primarily localized in its immediate vicinity. We demonstrate that sparsely distributed single Sn atoms do not account for the experimentally observed significant reduction in formate and hydrogen generation across the entire Sn-substituted Cu surface. This discrepancy underscores the need to reevaluate the proposed surface structure and the nature of the active sites on CuSn single-atom surface alloys.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"975 ","pages":"Article 118718"},"PeriodicalIF":4.1,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}