直接和间接电合成制备出的高铁酸钾的物理和电化学性能

K2FeO4 powders were synthesized by the ex-situ and in-situ electrochemical methods, respectively, and characterized by infrared spectrum （IR）, scanning electron microscopy （SEM）, X-ray powder diffraction （XRD） and BET. Their electrochemical performances were investigated by means of galvanostatic discharge and electrochemical impedance spectroscopy （EIS）. The results of physical characterization showed that the two samples have simi- lar structural features, but their surface morphologies and oriented growth of the crystals are different, which results in smaller specific surface area and lower solubility of the ex-situ electrosynthesized K2FeO4 sample. The results of discharge experiments indicated that the ex-situ electrosythesized K2FeO4 electrode has much larger discharge capacity and lower electrode polarization than the in-situ electrosynthesized K2FeO4 electrode. It was found from the results of EIS that lower electrochemical polarization might be responsible for the improvement on the discharge performance of the ex-situ electrosynthesized K2FeO4 electrode.     

突发公共安全事件中的政府危机管理研究——以上海外滩踩踏事件为例

在城市一些大型群体活动中,面临着各样的突发状况,对政府危机管理提出了很大的挑战。对突发公共安全事件中的政府危机管理存在的问题,围绕政府部门和社会公众两个方面展开研究:一方面,政府需要制订完善的应急处置预案,以及各职能部门的协调联动应急机制;另一方面,公众自我保护意识也亟待提高。现着重研究第一方面,提出政府危机管理中对群体性突发事件的监测预防、协调控制和善后处理的"三点一线"的管理模式。     

硝基甲烷在碳化钨电极上的电催化还原

用循环伏安、准稳态极化曲线和恒电位阶跃法研究了弱酸性介质中硝基甲烷在碳化钨(WC)电极上的电化学行为。研究表明：弱酸性介质中硝基甲烷在WC电极上的还原经历了两个电子得失过程，其反应过程主要受扩散控制。硝基甲烷在WC电极上发生还原反应的活化能为4．15kJ／moL，表明WC对硝基甲烷的电化学还原具有较好的电催化活性。     

有机合成中的绿色化学

绿色化学在有机合成中十分重要，近几年来得到了很大的发展，为了减少环境污染，实现有机合成的绿色化，可采用以下方法：选用绿色合成原料，减少在反应过程中使用有机溶剂，实现原料的绿色化，采用有机电合成技术，利用电子这一清洁的能源，实现一步反应合成有机物，提高产率，降低三废污染，采用合适的催化剂合成有机产品，减少合成步骤，提高产率，合成对环境有益的有机化工产品，降低传统农药，染料等化工产品对环境的影响。     

煤矿主排水系统经济运行探讨

针对矿井排水系统存在的问题,从煤矿主排水系统及设备运行特性上,分析影响矿井排水经济性的各种因素,提出主排水系统经济运行的措施和优化方案.以节约能源,降低生产成本.     

NiCu双金属电极电催化析氢

采用恒电流共沉积方法制备了具有纳米结构的NiCu双金属电极。采用线性扫描、塔菲尔曲线、电流时间曲线及电化学阻抗谱对NiCu双金属电极电催化析氢的性能进行了测试;并且还利用X射线衍射(XRD)、扫描电子显微镜(SEM)和循环伏安测试手段对其组成、相结构和表面形貌进行了表征和分析。实验结果表明,NiCu双金属电极的电催化析氢性能明显优于Ni电极或Cu电极,这可能与Cu和Ni的协同作用有关。在所研究的NiCu双金属电极中,NiCu0.04具有较好的电化学析氢活性,这主要与其电化学反应电阻较小和比表面积较大有关。     

螺杆式空压机的变频节能改造

针对空气压缩机存在用电量大、噪音大、自动化程度低等问题,采用压力变送器、AI人工智能调节器、变频器对螺杆式空气压缩机进行节能改造。改造后空压机节能效果显著,自动化程度高,具有很强实用性和推广意义。     

直接和间接电合成制备出的高铁酸钾的物理和电化学性能

K2FeO4powders were synthesized by the ex-situ and in-situ electrochemical methods, respectively, and characterized by infrared spectrum (IR), scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and BET. Their electrochemical performances were investigated by means of galvanostatic discharge and electrochemical impedance spectroscopy (EIS). The results of physical characterization showed that the two samples have similar structural features, but their surface morphologies and oriented growth of the crystals are different, which results in smaller specific surface area and lower solubility of the ex-situ electrosynthesized K2FeO4 sample. The results of discharge experiments indicated that the ex-situ electrosythesized K2FeO4 electrode has much larger discharge capacity and lower electrode polarization than the in-situ electrosynthesized K2FeO4 electrode. It was found from the results of EIS that lower electrochemical polarization might be responsible for the improvement on the discharge performance of the ex-situ electrosynthesized K2FeO4 electrode.     

一种新型空心镍纳米球的合成及其性能

以二氧化硅颗粒作为模板、金纳米颗粒作为表面晶种的方法制备了壳厚度可控的镍空心球。得到的空心镍纳米球是由似针状的面心立方的镍纳米颗粒构成的,碱溶液处理过程不影响镍纳米壳的形貌。高温处理显示镍空心球具有良好的热稳定性。研究了镍空心球电催化氧化甲醇和乙醇的活性,结果显示在碱性溶液中镍空心球是一种非常高效的甲醇和乙醇电催化氧化剂。