通讯机构：
[Xinhua Xu] C;[Wei-Min He] S;College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China<&wdkj&>School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
关键词：
Green chemistry;Electrochemistry;Cascade reaction;Multicomponent reaction;Thiocyanato
摘要：
A practical synthetic method for 4-thiocyanato-1 H -pyrazoles through the electrochemical cascade reaction of hydrazines , 1,3-diones and NH 4 SCN under metal-, chemical oxidant- and external electrolyte-free conditions was established. Importantly, both a gram-scale synthesis of 4-thiocyanato-1 H -pyrazoles and five one-pot sequential transformations starting from hydrazine were successfully accomplished.
A practical synthetic method for 4-thiocyanato-1 H -pyrazoles through the electrochemical cascade reaction of hydrazines , 1,3-diones and NH 4 SCN under metal-, chemical oxidant- and external electrolyte-free conditions was established. Importantly, both a gram-scale synthesis of 4-thiocyanato-1 H -pyrazoles and five one-pot sequential transformations starting from hydrazine were successfully accomplished.
通讯机构：
[Zeng, F.] C;[Wang, X.] S;College of Chemical and Biological Engineering, Hunan, China;School of Chemistry and Chemical Engineering, Hunan, China
作者机构：
[Rongnan Y.] Criminal Technology Department, Hunan Police Academy, Changsha, 410138, China;[Weimin H.] School of Chemistry and Chemical Engineering, University of South China, Hunan, Hengyang, 421001, China
通讯机构：
[Weimin, H.] S;School of Chemistry and Chemical Engineering, Hunan, China
作者机构：
[易荣楠] Criminal Technology Department, Hunan Police Academy, Changsha, 410138, China;[何卫民] School of Chemistry and Chemical Engineering, University of South China, Hunan, Hengyang, 421001, China
通讯机构：
[He, W.] S;School of Chemistry and Chemical Engineering, Hunan, China
摘要：
A novel and efficient electro-chemical initiated radical strategy was developed for the preparation of both N-substituted and N-unsubstituted 4-selanylisoquinolin-1(2H)-ones through selenylation of isoquinolin-1(2H)-ones with organodiselenides under chemical oxidant-, additive-free and ambient conditions.
作者机构：
[金灵华; 杨惠媛; 陈小洁; 李健; 张也] School of Chemistry and Chemical Engineering, University of South China, Hengyang;421001, China;[王伟科] Nanchang Institute of Technology, Nanchang;330044, China;School of Physics and Electronics, Hunan Normal University, Changsha
关键词：
草酸镍;沉淀法;电极材料;混合超级电容器
摘要：
开发具有优异电化学性能的阴极材料对混合超级电容器的应用至关重要。通过沉淀法成功合成了NiC2O4?2H2O 阴极材料，并对其微观结构、形貌及其电化学性能进行研究。结果表明：NiC2O4?2H2O 呈现出尺寸约0.5~2.0 μm 独特多面体颗粒结构，且每个颗粒由多晶所组成的，在1 A/g 的电流密度下可实现1 096.2 F/g 的高比容量。组装后的草酸镍//活性炭混合超级电容器在3.7 kW/kg 的高功率密度下，仍保持10.2 Wh/kg 的能量密度。将两个混合器件串联可以点亮绿色和黄色发光二极管。NiC2O4?2H2O 作为一种新型、成本低廉、环境友好型阴极材料在电化学储能中具有潜在的应用前景。 The development of cathode materials with excellent electrochemical properties is crucial for the application of hybrid supercapacitors. NiC2O4?2H2O cathode material was synthesized by a precipitation method, and its microstructure, morphology and electrochemical performance were investigated. The results show that NiC2O4?2H2O exhibits a unique polyhedral particle structure, the particle sizes are 0.5?2.0 μm, and each particle is composed of polycrystals, thus achieving a high specific capacity of 1 096.2 F/g at a current density of 1 A/g. The assembled nickel oxalate//activated carbon hybrid supercapacitor still maintains an energy density of 10.2 Wh/kg at a high power density of 3.7 kW/kg. Connecting two hybrid devices in series can light up green and yellow LEDs. This demonstrates that NiC2O4?2H2O has potential application prospects in electrochemical energy storage as a novel, low-cost and environmentally friendly cathode material.
作者机构：
[黄静; 何卫民; 伍智林; 王苛莉; 蒋俊] School of Chemistry and Chemical Engineering, University of South China, Hunan, Hengyang, 421001, China;[刘伟; 于贤勇] Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, Hunan University of Science and Technology, Hunan, Xiangtan, 411201, China
通讯机构：
[Jiang, J.; He, W.] S;School of Chemistry and Chemical Engineering, Hunan, China
作者机构：
[蔡垚; 吴红枚; 李端; 范诗易; 王洋洋] College of Chemistry and Chemical Engineering, University of South China, Hengyang;421000, China;[刘武] Dongguan Huilin New Material Technology Co. Ltd., Dongguan;523000, China;[蔡垚; 吴红枚; 李端; 范诗易; 王洋洋] 421000, China
通讯机构：
[Wu, H.] C;College of Chemistry and Chemical Engineering, China
通讯机构：
[Liu, Jianwen] S;Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, People's Republic of China.
关键词：
Coordination effect;Methanol selective oxidation;NiMoO4;Formate;Energy-saving hydrogen production
摘要：
<jats:title>Abstract</jats:title><jats:p>Electrocatalytic water splitting is a viable technique for generating hydrogen but is precluded from the sluggish kinetics of oxygen evolution reactions (OER). Small molecule oxidation reactions with lower working potentials, such as methanol oxidation reactions, are good alternatives to OER with faster kinetics. However, the typically employed Ni-based electrocatalysts have poor activity and stability. Herein, a novel three-dimensional (3D)-networking Mo-doped Ni(OH)<jats:sub>2</jats:sub> with ultralow Ni–Ni coordination is synthesized, which exhibits a high MOR activity of 100mAcm<jats:sup>−2</jats:sup> at 1.39V, delivering 28mV dec<jats:sup>−1</jats:sup> for the Tafel slope. Meanwhile, hydrogen evolution with value-added formate co-generation is boosted with a current density of more than 500mAcm<jats:sup>−2</jats:sup> at a cell voltage of 2.00V for 50h, showing excellent stability in an industrial alkaline concentration (6M KOH). Mechanistic studies based on density functional theory and X-ray absorption spectroscopy showed that the improved performance is mainly attributed to the ultralow Ni–Ni coordination, 3D-networking structures and Mo dopants, which improve the catalytic activity, increase the active site density and strengthen the Ni(OH)<jats:sub>2</jats:sub> 3D-networking structures, respectively. This study paves a new way for designing electrocatalysts with enhanced activity and durability for industrial energy-saving hydrogen production.</jats:p>
摘要：
Sr-doped LaMnO3 (LSM) which is the first-generation cathode for solid oxide fuel cells (SOFCs) has been tailored with Zn ions, aiming to achieve improved protonation ability for proton-conducting SOFCs (H-SOFCs). The new Sr and Zn co-doped LaMnO3 (LSMZ) can be successfully synthesized. The first-principle studies indicate that the LSMZ improves the protonation of LSM and decreases the barriers for oxygen vacancy formation, leading to high performance of the LSMZ cathode-based cells. The proposed LSMZ cell shows the highest fuel cell performance among ever reported LSM-based H-SOFCs. In addition, the superior fuel cell performance does not impair its stability. LSMZ is stable against CO2, as demonstrated by both in-situ CO2 corrosion tests and the first-principles calculations, leading to good long-term stability of the cell. The Zn-doping strategy for the traditional LSM cathode with high performance and good stability brings back the LSM cathode to intermediate temperatures and paves a new way for the research on the LSM-based materials as cathodes for SOFCs.
