An Efficient Cobalt Phosphide Electrocatalyst Derived from Cobalt Phosphonate Complex for All‐pH Hydrogen Evolution Reaction and Overall Water Splitting in Alkaline Solution

The development of low‐cost and highly efficient electrocatalysts via an eco‐friendly synthetic method is of great significance for future renewable energy storage and conversion systems. Herein, cobalt phosphides confined in porous P‐doped carbon materials (Co‐P@PC) are fabricated by calcinating the cobalt‐phosphonate complex formed between 1‐hydroxyethylidenediphosphonic acid and Co(NO₃)₂ in alkaline solution. The P‐containing ligand in the complex acts as the carbon source as well as in situ phosphorizing agent for the formation of cobalt phosphides and doping P element into carbon material upon calcination. The Co‐P@PC exhibits high activity for all‐pH hydrogen evolution reaction (overpotentials of 72, 85, and 76 mV in acidic, neutral, and alkaline solutions at the current density of 10 mA cm^?2) and oxygen evolution reaction in alkaline solution (an overpotential of 280 mV at the current density of 10 mA cm^?2). The alkaline electrolyzer assembled from the Co‐P@PC electrodes delivers the current density of 10 mA cm^?2 at the voltage of 1.60 V with a durability of 60 h. The excellent activity and long‐term stability of the Co‐P@PC derives from the synergistic effect between the active cobalt phosphides and the porous P‐doped carbon matrix.     

锌锅熔沟锌液流动方向成因分析及凝固后的处理方法探讨

本文根据电磁感应原理结合热动力学烟囱效应，分析了感应加热式锌锅锌液形成稳定流动原因，推导出锌锅两个感应加热器回路接线要使它们的磁场方向要相同的结论。 锌锅感应加热器停电是严重的故障，会造成熔沟内锌液凝固。一旦熔沟内锌液发生凝固，必须采用长时间低功率来使熔沟内“锌锭”缓慢熔化，以释放锌锭受热产生的应力避免造成耐材损坏引起漏锌。初步探讨了一种采用集肤效应原理来快速解决熔沟内凝固“锌锭”的方法。     

蒸馏设备与浓香型大曲酒质量的关系

就传统蒸馏Ｚｅｎｇ桶与酒质的关系作了简释，认为蒸馏设备存在某些不足，提出了改进方案设想，理论上似乎是可行的，但在实用上尚有不足，有待进一步探讨。     

出铝叉车的应用效果

简要介绍了114.5kA预焙槽出铝工艺概况及出铝专用设备的工作原理，设备结构和运行情况，对其经济性进行了简要分析。     

预焙电解槽智能控制系统

针对当前铝电解行业预焙槽改造，文章提出一种全新的分布式智能控制系统，系统性能价格比高，安全可靠。     

氧化铝浓相输送技术在中小铝厂的应用

介绍了氧化铝浓相输送技术的特点 ,以及中小铝厂纵向配置预焙槽的槽上供料技术和控制方法。与大型铝厂横向配置预焙槽进行了对比 ,提出了浓相输送技术是氧化铝输送及电解槽供料的最佳方案之一     

蜜罐技术在防御分布式拒绝服务攻击中的应用

Internet的迅速发展使网络信息安全问题变得日益突出,在防御DDOS攻击方面一直没有较理想的方法。这里分析了蜜罐技术,并首次给出了它在防御分布式拒绝攻击中的应用。     

关于电解铝厂烟气净化系统集气效率的探讨

笔者就电解铝厂电解烟气净化系统集气效率的有关问题,结合实际运行情况,从设计和运行2个方面,进行了系统地阐述,并针对电解烟气净化系统运行时的几个问题,提出了自己的看法和建议。     

One‐Pot Synthesis of Triazoloquinazolinones via Copper‐ Catalyzed Tandem Click and Intramolecular C?H Amidation

A novel and highly efficient copper‐catalyzed tandem synthesis of triazoloquinazolinones is explored. The synthetic strategy involves a sequential one‐pot click reaction followed by aerobic intramolecular C H amidation. Two distinct and important transformations were carried out in one‐pot by employing a single cost‐effective copper catalyst. The milder, rapid and ligand‐free reaction conditions as well as a broader substrate scope are the salient features of this novel protocol.