配电线路不停电作业机器人研究

从传统的人工带电作业方式出发,根据国内外不停电作业机器人的发展现状,对机器人带电作业方式进行分类,并结合具体实例,描述了我国不停电作业机器人的特点,对该领域存在的问题进行分析和展望.     

Transition-metal-doped NiSe2 nanosheets towards efficient hydrogen evolution reactions

Nano Research - Transition metal diselenides are promising electrocatalysts for hydrogen evolution and therefore different approaches have been proposed to enhance their catalytic activity. Herein,...     

二维湍流近壁涡量产生的研究

从不可压Navier—stokes方程出发,分析二维湍流运动固体表面“搓”出涡量的过程,并求得其涡量源强度和拟涡能扩散强度。     

液化气铜片腐蚀不合格原因分析

针对锦西石化分公司液化气铜片腐蚀不合格现象,对引起液化气腐蚀的物质进行了分析。分析结果表明,硫化氢或元素硫含量高时液化气铜片腐蚀不合格;但对未检出硫化氢的液化气进行铜片腐蚀和带液量分析,发现带液为痕迹量时铜片腐蚀合格,带液量大且色深的液化气腐蚀也不合格,且大多呈点状腐蚀;又分析了与液化气相关液体的腐蚀状况和含硫量以及起泡性能,最终认为锦西石化分公司液化气腐蚀不合格的原因,除了为有时脱硫效果不好之外,还源于液化气携带液体,该携带液中含有S2-,HS ,S2O32-,H2S等硫化物,造成了液化气铜片腐蚀不合格。     

Surface Reconstruction of Covellite CuS Nanocrystals for Enhanced OER Catalytic Performance in Alkaline Solution

Oxygen evolution reaction (OER) is one of the important half-reactions in energy conversion equipment such as water-spitting devices, rechargeable metal-air batteries, and so on. It is beneficial to develop efficient and low-cost catalysts that understand the reaction mechanism of OER and analyze the reconstruction phenomenon of transition metal sulfide. Interestingly, copper sulfide and cuprous sulfide with the same components possess different reconstruction behaviors due to their different metal ion valence states and different atomic arrangement modes. Because of a unique atomic arrangement sequence and certain cationic defects, the reconstruction phenomenon of CuS nanomaterials are that S²⁻ is firstly oxidized to SO₄²⁻ and then Cu^x+ is converted into CuO via Cu(OH)₂. In addition, the specific “modified hourglass structure” of CuS with excellent conductivity is easier to produce intermediates. Compared with Cu₂S, CuS exhibits excellent OER activity with a lower overpotential of 192 mV at 10 mA cm⁻² and remarkable electrochemical stability in 1.0 m KOH for 120 h. Herein, this study elucidates the reconstruction modes of CuS and Cu₂S in the OER process and reveals that CuS has a stronger Cu S bond and a faster electronic transmission efficiency due to “modified hourglass structure,” resulting in faster reconstruction of CuS than Cu₂S.     

Ceo2/Cus Nanoplates Electroreduce Co2 to Ethanol with Stabilized Cu+ Species

Copper-based electrocatalysts effectively produce multicarbon (C₂₊) compounds during the electrochemical CO₂ reduction (CO₂RR). However, big challenges still remain because of the chemically unstable active sites. Here, cerium is used as a self-sacrificing agent to stabilize the Cu⁺ of CuS, due to the facile Ce³⁺/Ce⁴⁺ redox. CeO₂-modified CuS nanoplates achieve high ethanol selectivity, with FE up to 54% and FE_C2+ ≈ 75% in a flow cell. Moreover, in situ Raman spectroscopy and in situ Fourier-transform infrared spectroscopy indicate that the stable Cu⁺ species promote C C coupling step under CO₂RR. Density functional theory calculations further reveal that the stronger ^*CO adsorption and lower C C coupling energy, which is conducive to the selective generation of ethanol products. This work provides a facile strategy to convert CO₂ into ethanol by retaining Cu⁺ species.     

关于增加“数字图书资源”的“政策资讯”思考

数字图书馆资源中,增加政策资讯的内容,对于电力工程设计单位来说,既是行业协会的标准要求,也是为工程和管理人员提供充足信息、提高设计与决策工作效率的有效途径。以山东电力工程咨询院使用的数字图书馆为例,针对增加政策资内容的范围、实现方式进行了描述,对实现的效果进行了分析。     

A fluorescent probe for the determination of Ce4+ in aqueous media

A rhodamine-based probe bearing an N,N-dimethylaniline unit was developed as a fluorescent chemodosimeter for Ce⁴⁺ in aqueous media. Importantly, the sensor can selectively respond to Ce⁴⁺ over other commonly coexistent metal ions (such as La³⁺, Ce³⁺, Pr³⁺, Nd³⁺, Sm³⁺, Eu³⁺, Gd³⁺, Er³⁺, Tb³⁺, Ho³⁺, Tm³⁺, Yb³⁺, Lu³⁺, Y³⁺) in aqueous media with a rapid response time. The system, which utilizes an irreversible Ce⁴⁺-promoted oxidation reaction, responds instantaneously at room temperature with linear proportionality to the amount of Ce⁴⁺.     

聚氨酯真空隔热板芯材的研制

制备了用于聚氨酯真空隔热板的开孔硬泡芯材,该泡沫芯材的开孔率达95％,讨论了聚醚多元醇,开孔剂及泡沫稳定剂等组分对芯材料性能的影响,并介绍了封装成真空隔热板的工艺,用该芯材制成的聚氨酯真空隔热板具有优良的隔热性能,其导热系低于0.010W(m.K).     

哈萨克斯坦石油天然气工业发展现状及展望

哈萨克斯坦拥有丰富的石油天然气资源,近年来石油天然气工业发展迅速。为了弄清哈萨克斯坦未来油气出口规模以及中哈两国油气合作前景,有必要对哈萨克斯坦油气工业发展历史、现状及规划进行分析研究。研究表明:未来,哈萨克斯坦油气产量将进一步增长,到2030年石油年产量达到1.18×108 t,天然气612×108 m3(含煤层气等非常规气);能源出口国地位进一步巩固,石油出口规模达1×108 t,天然气则主要满足本国市场需求,出口规模较小。为此,中哈两国作为近邻,能源互补性强,石油合作具有广阔的前景。