Korean Journal of Materials Research最新文献

Controllable Preparation of N-modified Cu-MOFs for Enhanced Steering CO2 Electroreduction Toward CH4 Products 可控制备n修饰Cu-MOFs以增强转向CO2电还原至CH4产物

Korean Journal of Materials Research Pub Date : 2025-08-27 DOI: 10.3740/mrsk.2025.35.8.352

Haixia Wang, Yilei Sun, Yao Liu, Kunjie Li, Ze-Da Meng, Won-Chun Oh

{"title":"Controllable Preparation of N-modified Cu-MOFs for Enhanced Steering CO2 Electroreduction Toward CH4 Products","authors":"Haixia Wang, Yilei Sun, Yao Liu, Kunjie Li, Ze-Da Meng, Won-Chun Oh","doi":"10.3740/mrsk.2025.35.8.352","DOIUrl":"https://doi.org/10.3740/mrsk.2025.35.8.352","url":null,"abstract":"The catalyst materials 0N-Cu-MOF, 1N-Cu-MOF, and 2N-Cu-MOF were successfully synthesized usinga solvothermal method, and using different concentrations of nitrogen-modified Cu organic frameworks (xN-Cu-MOF).Characterizations using X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) surface area analysis showed that 1N-Cu-MOF had the largest SSA and pore size among the three materials synthesized.1N-Cu-MOF exhibited the largest pore size and specific surface area among the three materials, which had a decisive effect on CO 2 reduction.In addition, stability and CO 2 reduction reaction (CO 2 RR) activity were evaluated by linear sweep voltmeter, cyclic voltmeter, electrochemical impedance spectroscopy, and time flow tests.Faradaic efficiency (FE) was determined by product analysis.Among the three catalyst materials, 1N-Cu-MOF showed the best catalytic performance at 50 mAcm -2 (maximum current density).The charge transfer resistance was 8.23 , the average current density was 19.9 mAcm -2 , and the FE of methane (CH 4 ) production showed a high efficiency of 70.45 % when tested for 12 h at an overpotential of -0.35 V (to-RHE).","PeriodicalId":17864,"journal":{"name":"Korean Journal of Materials Research","volume":"35 8","pages":"352-365"},"PeriodicalIF":0.0,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://journal.mrs-k.or.kr/articles/pdf/9vZv/mrsk-2025-035-08-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147900845","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}

引用次数: 0

Enhanced Electrochemical Properties of NaFe2PO4(SO4)2 via Co2+ Doping as Cathode Material for Sodium-ion Batteries 钠离子电池正极材料nae2po4 (SO4)2的电化学性能

Korean Journal of Materials Research Pub Date : 2025-07-27 DOI: 10.3740/mrsk.2025.35.7.266

Yao Liu, Yilei Sun, Haixia Wang, Ze-Da Meng, Won-Chun Oh

{"title":"Enhanced Electrochemical Properties of NaFe2PO4(SO4)2 via Co2+ Doping as Cathode Material for Sodium-ion Batteries","authors":"Yao Liu, Yilei Sun, Haixia Wang, Ze-Da Meng, Won-Chun Oh","doi":"10.3740/mrsk.2025.35.7.266","DOIUrl":"https://doi.org/10.3740/mrsk.2025.35.7.266","url":null,"abstract":"Sodium-ion batteries (SIBs) offer a viable alternative to partially or fully replace lithium ion batteries (LIBs) due to their lower cost and increased safety.This paper outlines the compositional optimizations, crystallographic evaluations, and electrochemical behavior of a novel mixed NASICON polyanionic compound, NaFe 2 PO 4 (SO 4 ) 2 (NFPS).X-ray photoelectron spectrometry (XPS) results showed that cobalt doping produces a higher concentration of oxygen defects compared to undoped samples.Scanning electron microscopy (SEM) analysis results revealed that the modified sample has more uniform pores and pore distribution.Brunauer-Emmett-Teller (BET) measurements showed that doping of Co 2+ reduces the specific surface area of NFPS-Co0.08compared to NFPS.This shortens the sodium ion diffusion pathway and promotes ion dynamics.The addition of Co 2+ to the sample significantly improved its performance during galvanostatic charge-discharge tests.The electrochemical activity also is significantly enhanced by Co 2+ doping.Na 0.84 Co 0.08 Fe 2 PO 4 (SO 4 ) 2 exhibits superior rate and cycling performance compared to pristine NFPS.After 80 cycles at 25 mA g -1 , NFPS-Co 0.08 retained discharge specific capacity of 60.8 mA h g -1 , which is 1.24 times greater than that of NFPS.","PeriodicalId":17864,"journal":{"name":"Korean Journal of Materials Research","volume":"35 7","pages":"266-276"},"PeriodicalIF":0.0,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://journal.mrs-k.or.kr/articles/pdf/Ro5Q/mrsk-2025-035-07-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147921697","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}

引用次数: 0

Facile Synthesis of WCu-C/N for Effective Catalyst toward Electrochemical Reduction of CO2 to CO WCu-C/N在电化学还原CO2为CO催化剂中的快速合成

Korean Journal of Materials Research Pub Date : 2024-09-27 DOI: 10.3740/mrsk.2024.34.9.409

Kai Chen, Ze-Da Meng, Yao Liu, Yilei Sun, Liang Yuan, Won‐Chun Oh

引用次数: 1

Enhanced Piezoelectric Degradation of Tetracycline Using Single-Atom Cu Anchored on t-BaTiO3 t-BaTiO3固载单原子Cu增强四环素的压电降解

Korean Journal of Materials Research Pub Date : 2024-09-27 DOI: 10.3740/mrsk.2024.34.9.422

Shu Ye, Jing Cheng, Ze-Da Meng, Won-Chun Oh

{"title":"Enhanced Piezoelectric Degradation of Tetracycline Using Single-Atom Cu Anchored on t-BaTiO3","authors":"Shu Ye, Jing Cheng, Ze-Da Meng, Won-Chun Oh","doi":"10.3740/mrsk.2024.34.9.422","DOIUrl":"https://doi.org/10.3740/mrsk.2024.34.9.422","url":null,"abstract":"Hydrothermal and ultrasonic processes were used in this study to synthesize a single-atom Cu anchored on t-BaTiO 3 .The resulting material effectively employs vibration energy for the piezoelectric (PE) catalytic degradation of pollutants.The phase and microstructure of the sample were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM), and it was found that the sample had a tetragonal perovskite structure with uniform grain size.The nanomaterial achieved a considerable increase in tetracycline degradation rate (approximately 95 % within 7 h) when subjected to mechanical vibration.In contrast, pure BaTiO 3 demonstrated a degradation rate of 56.7 %.A significant number of piezoinduced negative charge carriers, electrons, can leak out to the Cu-doped BaTiO 3 interface due to Cu's exceptional conductivity.As a result, a single-atom Cu catalyst can facilitate the separation of these electrons, resulting in synergistic catalysis.By demonstrating a viable approach for improving ultrasonic and PE materials this research highlights the benefits of combining ultrasonic technology and the PE effect.","PeriodicalId":17864,"journal":{"name":"Korean Journal of Materials Research","volume":"34 9","pages":"422-431"},"PeriodicalIF":0.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://journal.mrs-k.or.kr/articles/pdf/KzKa/mrsk-2024-034-09-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147888641","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}

引用次数: 0

Effect of Electron Beam Irradiation on the Opto-Electrical and Transparent Heater Property of ZnO/Cu/ZnO Thin Films for the Electric Vehicle Application 电子束辐照对用于电动汽车的 ZnO/Cu/ZnO 薄膜的光电和透明加热器特性的影响

IF 0.3

Korean Journal of Materials Research Pub Date : 2023-11-27 DOI: 10.3740/mrsk.2023.33.11.497

Yeon-Hak Lee, Min-Sung Park, Daeil Kim

引用次数: 0

Characteristics of Tin Oxide Thin Film Grown by Atomic Layer Deposition and Spin Coating Process as Electron Transport Layer for Perovskite Solar Cells 通过原子层沉积和自旋镀膜工艺生长的氧化锡薄膜作为 Perovskite 太阳能电池电子传输层的特性

IF 0.3

Korean Journal of Materials Research Pub Date : 2023-11-27 DOI: 10.3740/mrsk.2023.33.11.475

Ki Hyun Kim, Sung Jin Chung, Tae Youl Yang, Jong Chul Lim, Hyo Sik Chang

引用次数: 0

Extracted Catechin Incorporated Chitosan Patch for Dermal Drug Delivery Systems 用于皮肤给药系统的提取儿茶素壳聚糖贴片

IF 0.3

Korean Journal of Materials Research Pub Date : 2023-11-27 DOI: 10.3740/mrsk.2023.33.11.458

S. Choy

引用次数: 0

p-type CuI Thin-Film Transistors through Chemical Vapor Deposition Process 通过化学气相沉积工艺实现 p 型 CuI 薄膜晶体管

IF 0.3

Korean Journal of Materials Research Pub Date : 2023-11-27 DOI: 10.3740/mrsk.2023.33.11.491

Seungmin Lee, Seong Cheol Jang, Ji-Min Park, Soon-Gil Yoon, Hyunsook Kim

引用次数: 0

Dielectric Properties of (Ba0.7Sr0.3-3x/2Lax)(Ti0.9Zr0.1)O3 Ceramics with La3+ Substitution for Sr2+-Site 用 La3+ 取代 Sr2+ 晶位的 (Ba0.7Sr0.3-3x/2Lax)(Ti0.9Zr0.1)O3 陶瓷的介电性能

IF 0.3

Korean Journal of Materials Research Pub Date : 2023-11-27 DOI: 10.3740/mrsk.2023.33.11.465

S. Kim, Ju Hye Kim, E. Kim

引用次数: 0

Generation of Hydrogen Peroxide by Single-Atom Clusters Pd Anchored on t-BaTiO3 for Piezoelectric Degradation of Tetracycline 锚定在 t-BaTiO3 上的单原子团簇 Pd 生成过氧化氢，用于压电降解四环素

IF 0.3

Korean Journal of Materials Research Pub Date : 2023-11-27 DOI: 10.3740/mrsk.2023.33.11.447

Xin Ni, Yuan Liang, Quanzi Pan, Hengjie Guo, Kai Chen, Bo Zhang, Shaocong Ni, Bin Sheng, Zeda Meng, Shouqing Liu, Won-Chun Oh

引用次数: 0