Advanced Oxygen Electrocatalysis in Energy Conversion and Storage

Oxygen electrocatalysis is of great significance in electrochemical energy conversion and storage. Many strategies have been adopted for developing advanced oxygen electrocatalysts to promote these technologies. In this invited contribution, recent progress in understanding the oxygen electrochemistry from theoretical and experimental aspects is summarized. The major categories of oxygen electrocatalysts, namely, noble-metal-based compounds, transition-metal-based composites, and nanocarbons, are successively discussed for oxygen reduction and evolution. Design strategies of various oxygen electrocatalysts and their relationship on the structure–activity–performance are comprehensively addressed with the perspectives. Finally, the challenge and outlook for advanced oxygen electrocatalysts are discussed toward energy conversion and storage technologies.     

纳米棒状氧化锌整理蚕丝织物的抗紫外性能

轻薄蚕丝织物具有较高的紫外线透过率,有必要提高蚕丝织物的抗紫外线能力.采用水热法将纳米棒状氧化锌原位组装于蚕丝织物表面,探讨了锌离子浓度、氧化锌晶体生长温度和时间对织物抗紫外性的影响.结果表明,蚕丝织物表面可以形成氧化锌纳米棒阵列,以及整理后蚕丝织物的UPF值在50以上,具有良好的抗紫外性能,.     

苏53区块储集层岩石微观孔隙结构特征研究

储集层岩石微观孔隙结构特征直接反映了储集层的渗流能力,是综合评价储集层的重要依据,可以为储集层保护和开发方案的制定起到指导作用。基于这一目的,采用X射线衍射、扫描电镜、高压压汞等技术分析手段,对苏里格气田苏53区块盒8段-山1段储集层岩石微观孔隙结构特征进行分析研究,通过孔喉分布特征和压汞特征参数分析,结合粘土类型及分布情况,对苏53区块微观孔隙结构进行分类评价。分析结果表明,Ⅰ级和Ⅱ级孔隙结构的储集层为该区块的优质储集层,可作为苏53区块进一步勘探开发的目标。     

Investigation on the phase stability of cubic perovskite BaCo0.7Fe0.2Nb0.1O3-δ oxygen-permeable membrane

The phase stability of the cubic perovskite-type oxide BaCo_0.7Fe_0.2Nb_0.1O_3?δ (BCFNO) has been examined by means of X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). And, the timescale on the second phases has been established by using the TOPAS 4.2. Compared with Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3?δ (BSCFO), for samples annealed at T?=?1023?K for t?=?64 d, the rhombohedral and hexagonal phases formed on the surface of cubic perovskite BCFNO surface simultaneously and the amount of them is smaller. As for the rhombohedral phase, it comes out firstly along the grain boundary, and whose amount in equilibrium is about 5％. In contrast to the rhombohedral phase, the hexagonal phase is more likely to form at lower temperature which lead to the microcracks. In brief, obtaining the eligible phase stability is crucial for the industrial application of the oxygen permeation membrane.     

Corrosion formation and phase transformation of nickel-iron hydroxide nanosheets array for efficient water oxidation

Designing earth-abundant electrocatalysts with high performance towards water oxidation is highly decisive for the sustainable energy technologies. This study develops a facile natural corrosion approach to fabricate nickel-iron hydroxides for water oxidation. The resulted electrode demonstrates an outstanding activity and stability with an overpotential of 275 mV to deliver 10 mA·cm⁻². Experimental and theoretical results suggest the corrosion-induced formation of hydroxides and their transformation to oxyhydroxides would account for this excellent performance. This work not only provides an interesting corrosion approach for the fabrication of excellent water oxidation electrode, but also bridges traditional corrosion engineering and novel materials fabrication, which would offer some insights in the innovative principles for nanomaterials and energy technologies.

     

基于彩色图像的灰度仿真数码提花织物设计

为了在灰度仿真提花织物设计中保留数码图像的色彩信息,提出一种基于多组纬的灰度仿真提花织物的设计原理和方法。结合数码提花织物分层组合模式和全显色组合结构设计方法,通过分色然后组合的方法,可以将彩色效果的数码图像直接用于灰度仿真提花织物的设计,该方法采用多组灰度效果的丝线来还原数码图像的灰度效果,实现了提花织物对数码图像灰度效果的仿真设计。另外,由于获得的灰度仿真提花织物的分层结构保留了分色信息,若将灰度丝线换成有色丝线,则可以设计各种彩色效果的数码提花织物。采用该方法设计的织物能满足大批量生产的技术要求,为数码提花织物的设计创新提供了新的借鉴。     

辽河油田稠油松散岩心物性分析方法与应用

为了给稠油松散岩心的物性分析提供定量评价的标准,对稠油松散岩心的油、水饱和度,孔隙度,渗透率及碳酸盐含量的检测方法和技术原理进行了比较详细的介绍,通过对实验数据进行分析总结,与试油和测井数据相结合制定出适合辽河油田稠油储集层性质评价标准.结合应用实例,详细说明了利用物性分析资料评价储集层物性及含油性的可行性,对扩展岩心物性分析数据的应用领域、提升其应用水平具有一定的促进作用.