摘要：The exploration of highly active and durable cathodic oxygen reduction reaction(ORR)catalysts with economical production cost is still the bottleneck to realize the large‐scale commercialization of fuel cells and metal‐air *** that carbon support is crucial to the electrocatalysts,and Pt is the best‐known ORR catalyst so far,in this work,we employed a simple impregnation method for synthesizing a kind of defective activated carbon(D‐AC)supported low Pt content electrocatalysts for the *** reduction conditions of the Pt‐containing precursor were firstly optimized,and the influence of the Pt loading amount on the ORR was investigated as *** results show that the obtained D‐AC@5.0%Pt sample(contains5wt%Pt)has surpassed the commercial Pt/C with20wt%Pt for the ORR in an alkaline *** the meantime,it is more stable than the commercial Pt/*** outstanding ORR performance of the D‐AC@5.0%Pt confirms that both the unique defects in the D‐AC and the introduced Pt particles are indispensable to the ***,m the ORR activity of the synthesized catalysts is superior to most of the reported counterparts,but with much easier preparation methods and lower production cost,making them more advantageous in practical fuel cell applications.

摘要：Flower-like tin oxide-supported platinum（Pt/SnOx） with a hierarchical structure was synthesized by a hydrothermal method and characterized by XRD,SEM,TEM,high resolution TEM,XPS and nitrogen *** flower-like Pt/SnOx microspheres of 1 μm in diameter were composed of staggered petal-like nanosheets with a thickness of 20 *** nanoparticles（NPs） of 2-3 nm were well dispersed on the SnOx *** catalyst was tested in the catalytic oxidation of gaseous formaldehyde（HCHO） at room temperature,and exhibited enhanced activity compared to Pt NPs supported on commercial SnO and ground *** removal of 87%was achieved over the hierarchical Pt/SnOx after 1 h of reaction,which was 1.5 times that over the ground SnOx-supported Pt（Pt/g-SnOx）,and the high activity was maintained after six recycles,showing the high stability of this *** decomposition kinetics was modeled as a second order *** reaction rate constant for Pt/SnOx was 5.6 times higher than Pt/*** hierarchical pore structure was beneficial for the diffusion and adsorption of HCHO molecules,and the highly dispersed Pt NPs on the SnOx nanosheets were the active sites for the oxidative decomposition of HCHO into CO2 and *** study provided a promising approach for designing efficient catalysts for indoor HCHO removal at ambient temperature.

摘要：platinum(Pt)is an efficient catalyst for hydrogen evolution reaction(HER)and oxygen reduction reaction(ORR),but the debate of the relevance between the Pt particle size and its electrocatalytic activity still *** strong metal–support interaction(SMSI)between the metal and carrier causes the charge transfer and mass transport from the support to the ***,Pt species(0.5 wt.%)with various particle sizes supported on carbon nanotubes(CNTs)have been synthesized by a photo-reduction ***^1.5 nm-sized Pt catalyst shows much higher HER performance than the counterparts in all pH solutions,and the mass activity of it is even 23–36 times that of Pt/*** for ORR,the^3 nm-sized Pt catalyst exhibits the optimal performance,and the mass activity is 3 times and even 16 times that of Pt/C in acidic and alkaline media,*** high HER and ORR performances of the^1.5 nm-and^3 nm-sized Pt catalysts benefit from the SMSI between Pt and the CNTs matrix and the higher ratio of face sites to edge sites,which is meaningful for the design of efficient electrocatalysts for renewable energy application.

摘要：欢迎来到ROG玩家国度的世界，这是最新的ROG玩家国度Matrix GTX580 platinum（以下简称“Matrix 580”）显卡，它号称是目前最强的单核心显卡，拥有诸多创新设计。瞧，它那威武的身段和别具一格的设计无一不在向玩家展示它的无所不能。

摘要：第一次接触TAGA这个品牌的时候,我就联想到一句广告词“赶集网,啥都有!”TAGA的确是啥都有,包括售价十多万元的Hi-End级音箱,还有各类型的家庭影院音箱和定制安装扬声器、功放（包括胆机、定制安装放大器）、线材,甚至消费级别的桌面型音响、耳机放大器都有,真是一个包罗万象的品牌。这次我所评论的是TAGA里面的家庭影院音箱组合,由Azure OW-80 LCRS作为主声道、TLCR-580作为环绕声道、TCI platinum 100R作为天空声道,低频效果声道则使用两只SW-10组成,构成了7.4.2模式的Dolby Atmos影院。

摘要：美国数码音响专家MSB，一向在数码科技上有着前瞻性理念和前卫的构思，而早期产品最出色的地方，主要在于极高的性价比，例如Link Dac系列便是最佳例子。随后到platinum系列推出，则以合理和先进的设计取胜，好像当年旗舰级的佳作platinum Ⅲ，而本刊的写手和主笔，当中亦不乏此机的用家。

摘要：雷克沙白金版Ⅱ(platinumⅡ)与专业版(Professional)CF存储卡是分别针对摄影爱好者以及专业摄影师推出的两款存储卡,其中白金版二代CF卡的速度标称为80速(12MB/秒),已经可以满足中高端照相机对存储速度的需求。而专业版(Professional)则是专门为专业摄影师所设计的产品,它带有?（共2页)

摘要：艾默生网络能源（Emerson Network Power）宣布推出两款符合80 Plns platinum效率标准的超小型交流／直流前端电源产品。这两款电源的大小尺寸完全相同，额定的连续输出功率分别为750W和1100W，设计也极具灵活性，因此系统设计工程师只要采用这两款电源，便可因应市场的发展趋势，为寿命周期较长的电子设备灵活设计不同的电源系统，以满足新一代产品的供电要求。

摘要：Leitch的platinum大型矩阵提供了从电源、控制一直到信号路经的完全备份设计。负载均分的备份电源机风扇、前端安装支持热插拔的模块让系统在进行升级的时候都能保持在播出状态。每板8路输入输出的设计则限制了当一个模块发生故障时所影响的范围，同时还节约了用户在进行系统设计及升级时的投资。

摘要：这款电调专为模型直升机设计，内置高性能32位处理器，并整合了专业算法，可有效提高电机响应速度。其电路板搭载有防打火电路，可有效消除上电瞬间产生的电火花。