Loading...
中文

Table of Content

    15 February 2020, Volume 42 Issue 1
    Previous Issue    Next Issue
    Invited Special Paper
    The finding and application of the novel properties of nanozyme and ferritin
    MA Long, FAN Kelong
    2020, 42(1):  1-11.  doi:10.3969/j.issn.0253-9608.2020.01.001
    Asbtract ( 2967 )   PDF (9753KB) ( 1241 )  
    Related Articles | Metrics
    Inorganic nanomaterials are typically considered to be biologically inert. However, recent studies have shown that some types of inorganic nanomaterials exhibit catalytic activities similar to that of natural enzymes. We named this type of nanomaterials with enzyme-like activity as nanozyme. The finding of nanozyme breaks the traditional cognition of enzyme, and nanozyme is emerging as a new field of enzymology. Moreover, as a natural spherical nanostructure with uniform size, ferritin can be easily engineered to novel types of nanozymes. Importantly, natural ferritin can specifically target to many types of tumor cells without any modifications, which makes it as a promsing nanocarrier for tumor therapy. In this review, we briefly introduced the concepts of nanozymes and ferritin, and summarized our recent studies on nanozyme and ferritin in the fields of environmental management, immunoassay and tumor diagnosis and therapy. In addition, we gave prospects of nanozyme in biomedicine in the near future.
    Review Article
    Fundamentals of electrochemical impedance spectroscopy
    HUANG Qiuan, LI Weiheng, TANG Zhepeng, ZHANG Fangzhou, LI Aijun, ZHANG Jiujun
    2020, 42(1):  12-26.  doi:10.3969/j.issn.0253-9608.2020.01.002
    Asbtract ( 1715 )   PDF (4360KB) ( 1496 )  
    Related Articles | Metrics
    Electrochemical impedance spectroscopy (EIS) has been widely used in the field of electrochemical energy technologies such as fuel cells, batteries, supercapacitors, electrolysis of H 2 O and CO 2 . This paper systematically reviews the basic theory of EIS, measurement technology, development trend, and application in electrochemical energy technology, and clarifies the accurate understanding of the following four core issues: (1) What is EIS? (2) Why do you need EIS? (3) How to implement EIS diagnosis?
    (4) What are capability boundaries for EIS? In order to appropriately and accurately use EIS technique, it must be clear about its
    capability boundaries: what EIS can do, what EIS can’t do, and what EIS is good at. EIS is obviously not omnipotent, however its
    value and potential will be fully reflected if used correctly, especially for electrochemical energy technologies.
    Recent progress in metal sulfides as electrocatalysts for carbon dioxide electroreduction#br#
    SHAO Xiaolin, LIU Yuyu, YI Jin, ZHANG Jiujun
    2020, 42(1):  27-26.  doi:10.3969/j.issn.0253-9608.2020.01.003
    Asbtract ( 856 )   PDF (4975KB) ( 769 )  
    Related Articles | Metrics
    Efficient CO 2 electrocatalytic reduction to produce low-carbon fuels and valuable chemicals becomes a hot topic of research, and the development of high-efficiency electrocatalysts is one of the key technologies. Despite the increasing reports on the research and development of catalytic materials and the reaction mechanisms, synthetic catalysts are far from meeting the actual requirements
    in terms of activity, stability, selectivity and production cost. In recent years, among many explored electrocatalysts, metal sulfides
    have exhibited excellent electrocatalytic properties and applications. This paper will review and summarize the research status of new
    metal sulfide electrocatalysts and put forward the prospects for future research.
    Effects of carbon materials on the performance at negative plates of lead acid batteries under high-rate partial-stage-of-charge condition
    WANG Jiejie , DONG Li , YAN Wei , SHAO Qinsi , LI Aijun , ZHANG Jiujun , YANG Xuebin , ZHANG Shuxiang , WANG Limin
    2020, 42(1):  37-43.  doi:10.3969/j.issn.0253-9608.2020.01.004
    Asbtract ( 549 )   PDF (2055KB) ( 221 )  
    Related Articles | Metrics

    Key technology of hydrogen fed proton exchange membrane fuel cells
    ZHAO Dengyu, ZOU Wenwen, ZHAO Kangning, YE Daixin, ZHAO Hongbin, ZHANG Jiujun
    2020, 42(1):  44-50.  doi:10.3969/j.issn.0253-9608.2020.01.005
    Asbtract ( 1275 )   PDF (1982KB) ( 637 )  
    Related Articles | Metrics
    Hydrogen energy proton exchange membrane fuel cells (PEMFCs) are generally considered to be a type of clean, efficient, noise-free energy technology. It can produce electricity and heat from hydrogen through electrochemical reactions. The expectations for their commercialization in transport have not yet been realized for several decades ago. The main hurdles preventing commercialization are high cost, insufficient durability, high system complexity and a lack of hydrogen infrastructure. To better understand the issues, this review will introduce and discuss the basic principles and key technology of PEMFCs, including electrocatalysts, membranes and membrane electrode assemblies, as well as their perspectives in applications.
    Atomic dispersed metal catalysts derived from metal-organic frameworks
    LIU Minmin , ZHANG Xinquan , CHEN Chunhua , WANG Linlin , YAN Wei , ZHANG Jiujun
    2020, 42(1):  51-58.  doi:10.3969/j.issn.0253-9608.2020.01.006
    Asbtract ( 687 )   PDF (3369KB) ( 225 )  
    Related Articles | Metrics
    In recent years, atomic dispersed metal catalysts (ADMCs) have attracted wide attentions in the field of electrocatalysis due to their maximum atomic utilization efficiency (100%), unique active sites and high catalytic activity, stability and selectivity. Currently, as a prospective supporting material, metal-organic frameworks (MOFs) have been widely used for the preparation of ADMCs due to their specific molecular structure blocks, adjustable functional groups and effective coordination. In this review, the development of ADMCs derived from MOFs and their applications in electrochemical catalytic oxygen reduction reaction (ORR) are discussed. This paper also discussed the important progress of ADMCs made in this area, as well as some of the challenges and opportunities.
    Lightweight grids for lead-acid batteries
    YANG Tong , WANG Zhenwei , QIAN Shengqiang , WU Xin , SHAO Qinsi , YAN Wei , ZHANG Jiujun
    2020, 42(1):  59-65.  doi:10.3969/j.issn.0253-9608.2020.01.007
    Asbtract ( 876 )   PDF (2583KB) ( 723 )  
    Related Articles | Metrics
    Grid is one of the key components for electrochemical performance and practical applications of lead-acid batteries (LABs). In the effort to increase LABs’ energy density and prolong cycle life, weight reduction of the lead grid is required. Some lightweight metals, alloys, and their associated new grid structures have been recognized to be the promising alternatives to lead. In this paper, the advantages and disadvantages of these types of alternative grids and structures are reviewed and analyzed. For overcoming the challenges hindering the commercialization, several research directions are also proposed to facilitate the research and development of lightweight grids for lead-acid batteries.
    Progress
    Life lies in exercise: Improvement of heart and metabolism by exercise
    MENG Danni , GUO Mengying , XIAO Junjie , DENG Jiali
    2020, 42(1):  66-74.  doi:10.3969/j.issn.0253-9608.2020.01.008
    Asbtract ( 2515 )   PDF (1249KB) ( 1146 )  
    Related Articles | Metrics
    Exercise can be divided into aerobic exercise such as jogging, yoga, and anaerobic exercise such as weightlifting and hurdles, according to energy metabolism. Exercise can not only relieve pressure and release emotion, but also protect nervous system, immune system, locomotor system, endocrine system and circulatory system. This paper systematically expounds the important regulatory role of exercise in physiological cardiac hypertrophy and cardiovascular diseases such as pathological cardiac hypertrophy, myocardial infarction, atherosclerosis, heart failure, and metabolic diseases such as obesity, diabetes, fatty liver.
    Reading and Comments
[an error occurred while processing this directive]