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11.
Developing highly active bifunctional electrocatalysts for oxygen evolution reaction(OER)and oxygen reduction reaction(ORR)is of great significance in energy conversion and storage technologies.In this study,we systematically investigated the OER/ORR electrocatalytic activity of TMN4@G system by using density functional theory(DFT)calculations.Globally,IrN4@G is a very promising bifunctional catalyst for both OER and ORR with the extremely low overpotentials of 0.30 and 0.26 V,respectively.Such outstanding electrocatalytic performance is mainly attributed to the synergistic effect of Ir and N.More importantly,by constructing 2D activity volcano plots,we obtained the limiting overpotentials of TMN4@G system with the values of 0.26 V for OER and 0.24 V for ORR.These findings open up new opportunities for further exploring graphene-based materials for highly efficient OER/ORR electrocatalysts. 相似文献
12.
A new sensor based on the porous plastic probe has been developed for the detection of dissolved oxygen. This probe was prepared by co-polymerization of monomer, cross-linking reagent, porogent and luminescent ruthenium(II)diimine complex. The porous plastic probe exhibits good response to dissolved oxygen and resistance to indicator leaching out due to its high hydrophobicity. The preparation and characteristics of the probe were investigated in detail. This porous plastic probe serves as analyte-sensitive function as well as optical wave-guide, which make it easy to assemble the fiber-optical chemical sensor (FOCS). The developed sensor has been applied to the determination of dissolved oxygen in seawater with satisfactory results compared with the standard method. 相似文献
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Fan Jiaqian Xie Zhengfeng Wang Xiaogang Shi Tianzhu 《Russian Journal of Applied Chemistry》2020,93(12):1899-1905
Russian Journal of Applied Chemistry - A catalyst (PWG) with glycine modified phosphotungstic acid was synthesized, and used in the process of oxidative desulfurization. FT-IR, XRD and SEM were... 相似文献
15.
LetS
1.1 denote the submanifold of Lorentz spaceR
2.1, which is composed of all pointsl withl
2=1 and letT
1.1=R
1.1/Z×Z. In this paper we study the existence of nontrivial harmonic maps fromT
1.1 toS
1.1 andH
2, and construct a harmonic map for any homotopy class of maps fromT
2 toS
1.1. 相似文献
16.
Heping Wen Jiajun Xu Yunlong Liao Ruiting Chen Danze Shen Lifei Wen Yulin Shi Qin Lin Zhonghao Liang Sihang Zhang Yuxuan Liu Ailin Huo Tong Li Chang Cai Jiaqian Wen Chongfu Zhang 《Entropy (Basel, Switzerland)》2021,23(8)
In the current network and big data environment, the secure transmission of digital images is facing huge challenges. The use of some methodologies in artificial intelligence to enhance its security is extremely cutting-edge and also a development trend. To this end, this paper proposes a security-enhanced image communication scheme based on cellular neural network (CNN) under cryptanalysis. First, the complex characteristics of CNN are used to create pseudorandom sequences for image encryption. Then, a plain image is sequentially confused, permuted and diffused to get the cipher image by these CNN-based sequences. Based on cryptanalysis theory, a security-enhanced algorithm structure and relevant steps are detailed. Theoretical analysis and experimental results both demonstrate its safety performance. Moreover, the structure of image cipher can effectively resist various common attacks in cryptography. Therefore, the image communication scheme based on CNN proposed in this paper is a competitive security technology method. 相似文献
17.
Jiaqian Qin Lei Chen Liang Xu Yaohao Song Yi Liu Yongpeng Lei Yougen Tang 《Journal of Energy Chemistry》2020,(11):395-401
The development of non-precious,high-efficient and durable electrocatalysts for H2 evolution in alkaline media is highly desirable.Herein we report NiCoP nanole... 相似文献
18.
Activity‐based protein profiling (ABPP) and bioimaging have been developed in recent years as powerful technologies in drug discovery. Specifically, both approaches can be applied in critical steps of drug development, such as therapy target discovery, high‐throughput drug screening and target identification of bioactive molecules. We have been focused on the development of various strategies that enable simultaneous activity‐based protein profiling and bioimaging studies, thus facilitating an understanding of drug actions and potential toxicities. In this Minireview, we summarize these novel strategies and applications, with the aim of promoting these technologies in drug discovery. 相似文献
19.
铝蜂窝屏蔽通风窗化学镀镍 总被引：1，自引：0，他引：1
本文报道了铝蜂窝屏蔽通风窗化学镀磁性镍层和非晶态镍层的工艺研究结果．试验与产品镀复结果证明所得镍层外观光亮、厚度均匀、与铝及铝合金基体结合力优良，具有良好的导电、导磁和耐腐蚀性能．可满足电子设备、波导及屏蔽室等方面对电磁屏蔽性能的要求 相似文献
20.
以过氧化氢(H2O2)为自然水体生物膜产生的活性氧(ROS)的代表, 通过模拟实验, 研究了水-自然水体生物膜体系中光/暗变化、 生物膜的避光预处理与数量、 有机配体和pH值对体系中H2O2浓度的影响. 结果表明, 光照可快速增加体系中H2O2浓度, 光照转为无光时体系H2O2浓度下降(约为光照时的2/3); 避光预处理会显著降低体系中H2O2的产生速率和浓度; 生物膜数量的增减会导致体系H2O2浓度的相应增减; 有机配体的存在会使体系内H2O2浓度下降(约1/2~1/3); pH=7和5的体系中H2O2的浓度高于pH=9的体系(高出约1.5倍). 上述各因素主要通过影响生物膜生产H2O2、 H2O2自然分解和生物膜去除H2O2 3种作用来影响体系H2O2浓度. 相似文献