Journal of Electroanalytical Chemistry最新文献

Boosting electrochemical CO2 to formate conversion via oxygen vacancy-rich 2D SnO2 gas diffusion electrodes 通过富氧空位的2D SnO2气体扩散电极促进电化学CO2到甲酸的转化

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-05-27 DOI: 10.1016/j.jelechem.2025.119239

Cleiton P.M. Silva , Rafael A.C. Souza , Gonçalves J. Marrenjo , David Patrun , Leticia Poggere , Sheila C. Canobre , Sanjay Mathur , Antonio Otavio T. Patrocinio , Osmando F. Lopes

{"title":"Boosting electrochemical CO2 to formate conversion via oxygen vacancy-rich 2D SnO2 gas diffusion electrodes","authors":"Cleiton P.M. Silva , Rafael A.C. Souza , Gonçalves J. Marrenjo , David Patrun , Leticia Poggere , Sheila C. Canobre , Sanjay Mathur , Antonio Otavio T. Patrocinio , Osmando F. Lopes","doi":"10.1016/j.jelechem.2025.119239","DOIUrl":"10.1016/j.jelechem.2025.119239","url":null,"abstract":"<div><div>The development of efficient and earth-abundant catalysts for the electrochemical reduction of CO<sub>2</sub> into value-added products is crucial for the circular economy and mitigation of the greenhouse effect. However, CO<sub>2</sub> presents high stability and low solubility in aqueous electrolytes, and efficiency is often limited by CO<sub>2</sub> diffusion through the liquid medium to the catalyst surface. This study investigates the combined influence of SnO<sub>2</sub> morphology (nanospheres and nanosheets) and oxygen vacancies density in the synthesized oxides on the selective electrochemical reduction of CO<sub>2</sub> to formate (HCOO<sup>−</sup>), employing a flow cell configuration and a gas diffusion electrode (GDE). Under optimized conditions, oxygen vacancy-rich SnO<sub>2</sub> nanosheets exhibited the highest CO<sub>2</sub>-to-HCOO<sup>−</sup> efficiency, achieving selectivity above 90 %, a current density greater than −200 mA cm<sup>−2</sup>, and stable operation for 5 h. XPS analysis revealed the coexistence of Sn<sup>2+</sup> and Sn<sup>4+</sup> species on the surface directly related to the oxygen vacancies, suggesting a key role of the mixed oxidation states in decrease the charge transfer resistance and enhancing catalytic performance. The HCOO<sup>−</sup> selectivity of SnO<sub>2</sub>-based catalysts gradually decreased over time at high current densities due to salt deposition and flooding processes.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"992 ","pages":"Article 119239"},"PeriodicalIF":4.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168228","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}

引用次数: 0

Enhanced oxygen evolution reaction activity and stability through Fe and Cr Co-incorporation in cobalt hydroxide 铁和铬共掺入氢氧化钴中，增强析氧反应活性和稳定性

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-05-27 DOI: 10.1016/j.jelechem.2025.119249

Harish S. Chavan , Deepak Rajaram Patil , JeongEun Yoo , Jiyoung Kim , Yongseon Choi , Seunghwa Lee , Kiyoung Lee

{"title":"Enhanced oxygen evolution reaction activity and stability through Fe and Cr Co-incorporation in cobalt hydroxide","authors":"Harish S. Chavan , Deepak Rajaram Patil , JeongEun Yoo , Jiyoung Kim , Yongseon Choi , Seunghwa Lee , Kiyoung Lee","doi":"10.1016/j.jelechem.2025.119249","DOIUrl":"10.1016/j.jelechem.2025.119249","url":null,"abstract":"<div><div>Efficient and durable electrocatalysts are essential for advancing sustainable energy conversion, particularly for the oxygen evolution reaction (OER) in water splitting. However, overcoming the complex, multi-electron OER mechanism remains a significant challenge, with the formation of high-oxidation-state metal–OOH (M–OOH) intermediates acting as the rate-limiting step. Here, we present a high-performance CoFeCr (oxy)hydroxide electrocatalyst, synthesized by strategically incorporating Fe and Cr into a Co matrix. The co-incorporation of Fe and Cr transforms flake-like Co hydroxide into uniform nanospheres, significantly enhancing OER activity through the formation of abundant oxyhydroxide species. This catalyst exhibits exceptional OER performance, with a low overpotential of 203 mV at 10 mA cm<sup>−2</sup> and a Tafel slope of 42.03 mV dec<sup>−1</sup> in 1 M KOH. Furthermore, it maintains excellent stability over 100 h of continuous operation at 100 mA cm<sup>−2</sup> in 1 M KOH. The superior performance is attributed to the synergistic effects of Fe, which accelerates OOH intermediate formation, and Cr, which improves electrical conductivity and stabilizes active sites by forming high-valence Cr<sup>6+</sup> species. The CoFeCr (oxy)hydroxide electrocatalyst significantly outperforms state-of-the-art NiFe-based counterparts, establishing itself as a robust and efficient electrocatalyst for large-scale water splitting.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"992 ","pages":"Article 119249"},"PeriodicalIF":4.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178805","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}

引用次数: 0

Antimony doping improves the performance of cobalt‑vanadium hydrotalcite as the electrode of supercapacitors 锑的掺杂提高了钴钒水滑石作为超级电容器电极的性能

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-05-27 DOI: 10.1016/j.jelechem.2025.119238

Zhaoyang Li , Yujiao Lu , Guorong Wang

{"title":"Antimony doping improves the performance of cobalt‑vanadium hydrotalcite as the electrode of supercapacitors","authors":"Zhaoyang Li , Yujiao Lu , Guorong Wang","doi":"10.1016/j.jelechem.2025.119238","DOIUrl":"10.1016/j.jelechem.2025.119238","url":null,"abstract":"<div><div>Due to its limited charge transfer capability, the layered double hydroxides (LDHs) material struggles to fully realize its ultra-high theoretical energy storage capacity when utilized as a supercapacitor electrode. The introduction of heteroatoms is widely regarded as an effective strategy for modulating charge distribution in LDHs materials. Herein, to address the issue of weak conductivity, the local charge distribution of CoV LDHs nanomaterials was modified through elemental doping with the metal element antimony, thereby enhancing their intrinsic charge conduction capabilities. As a result, the Sb-CoV LDHs-0.2 exhibits a specific capacitance of 326.7 F g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup>, which is 1.6 times higher than that of CoV-LDHs. Furthermore, the asymmetric supercapacitor, assembled with Sb-CoV LDHs-0.2 as the positive electrode and commercial activated carbon (AC) as the negative electrode, achieves an energy density of 10.1 Wh kg<sup>−1</sup> at a power density of 943.6 W kg<sup>−1</sup>. Additionally, under a current density of 5 A g<sup>−1</sup>, the device demonstrates remarkable cycling stability, with no observable capacity attenuation after 10,000 consecutive charge-discharge cycles. These results suggest that antimony elements significantly enhance the charge transfer and durability of LDHs materials.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"992 ","pages":"Article 119238"},"PeriodicalIF":4.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168227","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}

引用次数: 0

NiS/hollow carbon sphere composites for high-performance and long-life Lithium-ion battery anodes 高性能、长寿命锂离子电池负极用NiS/空心碳球复合材料

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-05-27 DOI: 10.1016/j.jelechem.2025.119237

Wail Hafiz , Yanshuang Meng , Dongming Qi , Fuliang Zhu

{"title":"NiS/hollow carbon sphere composites for high-performance and long-life Lithium-ion battery anodes","authors":"Wail Hafiz , Yanshuang Meng , Dongming Qi , Fuliang Zhu","doi":"10.1016/j.jelechem.2025.119237","DOIUrl":"10.1016/j.jelechem.2025.119237","url":null,"abstract":"<div><div>Transition metal sulfides are promising anode materials for LIBs, but are restricted by poor cycle stability and rate performance. In this study, NiS composites with a hollow sphere structure (NiS/HCS) were synthesized for high-performance LIBs using high-temperature carbonization and hydrothermal methods. This structure combines the high specific capacity of NiS and the conductivity of carbonaceous materials. NiS nanoparticles are uniformly distributed on the carbon sphere surfaces, enhancing active site accessibility, while the carbon hollow spheres' inner cavity reduces volume expansion during cycling. The NiS/HCS electrode delivered an initial specific discharge capacity of 982.9 mAh g<sup>−1</sup> at 0.2 A g<sup>−1</sup> and retained 200.6 mAh g<sup>−1</sup> after 500 cycles. Electrochemical kinetic analysis showed a capacitance contribution increase to 69 % at 1.2 mV s<sup>−1</sup>. The hollow carbon sphere improves conductivity and reduces expansion, while NiS nanoparticles enhance electron transport and electrochemical kinetics. This study offers insights and methods for developing transition metal sulfide-based hollow carbon spheres as high performance anode materials, advancing next-generation LIBs with better efficiency, reliability, and stability.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"992 ","pages":"Article 119237"},"PeriodicalIF":4.1,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168226","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}

引用次数: 0

In situ synthesis of nickel-substituted zeolitic metal-organic framework on Ti3C2 MXene for enhanced electrocatalytic sensing of L-tryptophan 在ti3c2mxene上原位合成镍取代的沸石金属-有机骨架以增强l-色氨酸的电催化传感

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-05-24 DOI: 10.1016/j.jelechem.2025.119215

Seyyed Mehdi Khoshfetrat

{"title":"In situ synthesis of nickel-substituted zeolitic metal-organic framework on Ti3C2 MXene for enhanced electrocatalytic sensing of L-tryptophan","authors":"Seyyed Mehdi Khoshfetrat","doi":"10.1016/j.jelechem.2025.119215","DOIUrl":"10.1016/j.jelechem.2025.119215","url":null,"abstract":"<div><div>Herein, in situ synthesis of a nickel-substituted zeolitic metal-organic framework, Ni-ZIF-8, (referred to NZM) on Ti<sub>3</sub>C<sub>2</sub> MXene enhanced the functionalities for the electrocatalyst sensing of L-tryptophan (L-Trp). The exceptional electrical conductivity of the Ti<sub>3</sub>C<sub>2</sub> MXene complements the high porosity of NZM, resulting in synergistic effects that improve charge transport and stability. The dual functionality of NZM/Ti<sub>3</sub>C<sub>2</sub> enhanced their high electrical conductivity through delamination and improved accessibility of the electrolyte to the surface of the active materials. Furthermore, the incorporation of Ni<sup>2+</sup> and coordination of 2-methylimidazole (2-MeIM) as a nitrogen source with enhanced electronegativity improved the interaction between the NZM and the L-Trp molecules. The proposed electrode exhibited remarkable sensitivity and selectivity for the analysis of L-Trp, providing a broad dynamic range (5 nM-200 μM) and a low detection limit of 0.1 nM. In addition, the prepared sensor was successfully used to monitor L-Trp in a complex milk matrix.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"992 ","pages":"Article 119215"},"PeriodicalIF":4.1,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138269","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}

引用次数: 0

Effect of fluorine doping on the electrocatalytic properties of Nb2O5 for H2O2 electrogeneration 氟掺杂对Nb2O5电催化生成H2O2性能的影响

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-05-23 DOI: 10.1016/j.jelechem.2025.119231

Aline B. Trench, João Paulo C. Moura, Caio Machado Fernandes, Mauro C. Santos

{"title":"Effect of fluorine doping on the electrocatalytic properties of Nb2O5 for H2O2 electrogeneration","authors":"Aline B. Trench, João Paulo C. Moura, Caio Machado Fernandes, Mauro C. Santos","doi":"10.1016/j.jelechem.2025.119231","DOIUrl":"10.1016/j.jelechem.2025.119231","url":null,"abstract":"<div><div>The oxygen reduction reaction (ORR) via the 2-electron mechanism is an efficient way to produce hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) under mild conditions. This study examines the modification of Vulcan XC72 carbon with fluorine (F)-doped niobium oxide (Nb<sub>2</sub>O<sub>5</sub>) nanoparticles at varying molar ratios (0, 0.005, 0.01, 0.02). The F-doped Nb<sub>2</sub>O<sub>5</sub> nanoparticles were synthesized using the oxidizing peroxide method and then incorporated into Vulcan XC72 carbon via impregnation. Characterization techniques included X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), contact angle measurements, and X-ray photoelectron spectroscopy (XPS). Electrochemical evaluation using the rotating ring disk electrode method revealed that Vulcan XC72 modified with 1.0 % F-doped Nb<sub>2</sub>O<sub>5</sub> exhibited the best ORR performance. When used as a gas diffusion electrode, this electrocatalyst produced more H<sub>2</sub>O<sub>2</sub> at all applied potentials than the pure and Nb<sub>2</sub>O<sub>5</sub>-modified Vulcan XC72 carbon. At potentials of −0.7 V and −1.3 V, the proposed electrocatalyst achieved H<sub>2</sub>O<sub>2</sub> yields 65 % and 98 % higher than the Nb<sub>2</sub>O<sub>5</sub>-modified electrocatalyst. Furthermore, it presented lower energy consumption and higher current efficiency than the other electrocatalysts compared in this study. The enhanced performance is attributed to F doping, which increased Nb<sub>2</sub>O<sub>5</sub> lattice distortion and disorder, improving electron availability for ORR. Additionally, F-doped electrocatalysts exhibited more oxygenated species and greater hydrophilicity, facilitating O<sub>2</sub> adsorption, transport, and electron transfer. These properties significantly enhanced H<sub>2</sub>O<sub>2</sub> electrogeneration efficiency while reducing energy consumption.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"992 ","pages":"Article 119231"},"PeriodicalIF":4.1,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147200","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}

引用次数: 0

Corrigendum to “Defects-engineered build in a Molecule-Based trinuclear iron cluster material as anode materials for lithium-ion batteries” [J. Electroanal. Chem. 980 (2025) 118990] “分子基三核铁团簇材料作为锂离子电池负极材料的缺陷工程构建”[J]。Electroanal。化学。980 (2025)118990]

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-05-23 DOI: 10.1016/j.jelechem.2025.119200

Qing Zeng , Hualing Tian , Yang Zhang , Yanjun Cai , Qingrong Kong , Zhi Su

引用次数: 0

A 3D coral-like Co3O4@CoMoO4 for high-performance supercapacitors with superior energy density and cycling stability 3D珊瑚状Co3O4@CoMoO4，用于高性能超级电容器，具有优越的能量密度和循环稳定性

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-05-23 DOI: 10.1016/j.jelechem.2025.119233

Yongfa Long , Yongda Tan , Zhentao Liu , Linsong Li , Huixin Jin , Meilong Wang

{"title":"A 3D coral-like Co3O4@CoMoO4 for high-performance supercapacitors with superior energy density and cycling stability","authors":"Yongfa Long , Yongda Tan , Zhentao Liu , Linsong Li , Huixin Jin , Meilong Wang","doi":"10.1016/j.jelechem.2025.119233","DOIUrl":"10.1016/j.jelechem.2025.119233","url":null,"abstract":"<div><div>In this study, the 3D coral-like layered structure of Co<sub>3</sub>O<sub>4</sub>@CoMoO<sub>4</sub>, synthesized by the hydrothermal method, plays a crucial role in its excellent electrochemical properties. This 3D coral-like structure, enriched with oxygen vacancies, mesopores, and defect sites, enables efficient charge storage by shortening the ion/electron transport path and exposing the active sites. The unique coral-like structure between Co<sub>3</sub>O<sub>4</sub> and CoMoO<sub>4</sub> enhances the electron conductivity and stabilizes the interfacial redox reactions. In particular, the specific capacitance of the Co<sub>3</sub>O<sub>4</sub>@CoMoO<sub>4</sub> electrode was found to be as high as 2370.8 F g<sup>−1</sup> at 1 A g<sup>−1</sup>. The prepared Co<sub>3</sub>O<sub>4</sub>@CoMoO<sub>4</sub>//AC exhibited an energy density of 43.75 W h kg<sup>−1</sup> at a power density of 700 W kg<sup>−1</sup>. Furthermore, the specific capacitance retention of Co<sub>3</sub>O<sub>4</sub>@CoMoO<sub>4</sub>//AC was maintained at 92.19 % after 5000 cycles at 3 A g<sup>−1</sup>. This work demonstrates a viable strategy to overcome the inherent limitations of transition metal oxides, which has potential for application in high-power, long-life energy storage systems.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"992 ","pages":"Article 119233"},"PeriodicalIF":4.1,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138228","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}

引用次数: 0

Dry coating and self-combustion reaction strategy for lithium residual removal and performance enhancement of Ni-rich oxide cathodes 富镍氧化物阴极干涂及自燃反应去除锂残馀及提高性能策略

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-05-22 DOI: 10.1016/j.jelechem.2025.119209

Phan Phuoc Hien , Pham Ngoc Thao , Thi Bich Thuy Hoang , Van-Chuong Ho

{"title":"Dry coating and self-combustion reaction strategy for lithium residual removal and performance enhancement of Ni-rich oxide cathodes","authors":"Phan Phuoc Hien , Pham Ngoc Thao , Thi Bich Thuy Hoang , Van-Chuong Ho","doi":"10.1016/j.jelechem.2025.119209","DOIUrl":"10.1016/j.jelechem.2025.119209","url":null,"abstract":"<div><div>Dry coating application for Ni-rich layered oxide cathode materials is one attractive approach to improving the performance of rechargeable batteries due to their avoiding moisture sensitivity, damage to the layered structure, and environmental issues. However, surface impurities are still severe, causing capacity fading and poor electrochemical cycle life. Herein, we propose a simple dry aluminum oxide surface coating to build a stable surface structure and simultaneously effectively eliminate surface impurities. An exothermic reaction generates a high energy of 23,802 kJ/kg (at 300 °C) to remove LiOH and Li<sub>2</sub>CO<sub>3</sub> surface impurities, and a lithium quantity from impurities transferred to the aluminum oxide forms a stability-conducive LiAlO<sub>2</sub> coating layer. Accordingly, the LiAlO<sub>2</sub> coating on Ni-rich oxide layered cathode materials demonstrates the high electrochemical performance of lithium-ion batteries. The results highlight a cost-effective and scalable coating process for cathode active materials, paving the way for large-scale cathode production in lithium-ion batteries.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119209"},"PeriodicalIF":4.1,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116775","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}

引用次数: 0

In-situ synthesized PtZnCu nanoalloy on carbon cloth for ultrasensitive electrochemical ammonia-nitrogen detection 碳布原位合成PtZnCu纳米合金用于超灵敏电化学氨氮检测

IF 4.1 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2025-05-21 DOI: 10.1016/j.jelechem.2025.119211

Guanda Wang , Guangfeng Zhou , Enji Li , Lan Ding , Dong He , Chun Zhao , Hui Suo

{"title":"In-situ synthesized PtZnCu nanoalloy on carbon cloth for ultrasensitive electrochemical ammonia-nitrogen detection","authors":"Guanda Wang , Guangfeng Zhou , Enji Li , Lan Ding , Dong He , Chun Zhao , Hui Suo","doi":"10.1016/j.jelechem.2025.119211","DOIUrl":"10.1016/j.jelechem.2025.119211","url":null,"abstract":"<div><div>Nanoalloy materials showed excellent, sensitive properties in the research field of ammonia‑nitrogen electrochemical sensors, which have been widely used by researchers. The PtZnCu ternary nanoalloy electrode based on a carbon cloth substrate (PtZnCu-CC) was prepared using one-step electrodeposition. The characterization results showed that the alloying of Zn, Cu and Pt regulated the electronic structure of Pt and enhanced the electrocatalytic oxidation capacity of Pt for ammonia‑nitrogen. Meanwhile, it was proved by density functional theory (DFT) that PtZnCu nanoalloy fully inherited the advantages of PtCu and PtZn nanoalloy, which not only enhanced the adsorption capacity of ammonia but also balanced the free energy of each step. Finally, the sensitivity of the whole electrode to ammonia‑nitrogen was improved. The linear detection range of the sensor based on PtZnCu-CC electrode for ammonia‑nitrogen was 0.5–1000 μM, the sensitivity was 23.9 μA μM<sup>−1</sup> cm<sup>−2</sup>, and the limit of detection (LOD) was 8.37 nM, which showed satisfactory repeatability, anti-interference and stability. This work provided a specific direction for designing high-performance electrochemical sensors.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"991 ","pages":"Article 119211"},"PeriodicalIF":4.1,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144123181","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}

引用次数: 0