Research group of Wang Dan, Institute of process engineering, Chinese Academy of Sciences

As an efficient catalyst for oxygen electrode reaction, lead heteroatom doped carbon materials are widely used in energy conversion devices such as metal air cells and fuel cells However, due to the uncontrollability of heteroatom doping site, doping content and doping configuration, it is difficult to study the structure-activity relationship of catalyst materials How to control doping accurately and obtain excellent catalytic activity is a great challenge Graphite alkyne, as a new kind of carbon allotrope, its rich alkyne bond segments provide the possibility of chemical doping, which attracts the attention of researchers Recently, Wang Dan research group of Institute of process engineering, Chinese Academy of Sciences has made a new breakthrough in this field (j.am Chem SOC 2019, DOI: 10.1021/jacs.8b13695) Professor Wang Dan's research group is engaged in the synthesis, assembly and precise regulation of special nanostructured functional particles, the construction of multi-level mesoscale structure, and the study of structure-activity relationship between material structure and performance Especially in the controllable synthesis of hollow multi shell structure, the doping modification of two-dimensional carbon materials and its application in new energy, catalysis and other fields, many breakthroughs have been made So far, many academic papers have been published, including nature energy, nature chem., chem SOC Rev., chem, J am Chem SOC., adv mater., angel Chem Int ed., adv.sci., ACS Nano, energy energy energy SCI., nano lett And other internationally renowned journals Prof Wang Dan is a researcher and doctoral supervisor of the Institute of process engineering, Chinese Academy of Sciences He received his bachelor's degree in inorganic chemistry from Jilin University in July 1994, his master's degree in inorganic chemistry from Jilin University in July 1997, and his master's degree in material science and technology from academician Feng Shouhua; and his doctor's degree in material science and technology from Yamanashi University in March 2001 From April 2001 to March 2003, he successively worked as a postdoctoral fellow in the Institute of hydrothermal chemistry, Kochi University, Japan, and the Institute of geo environmental technology industry, Japan From April 2003 to January 2004, he worked as a special researcher of JSPS for foreigners in the Institute of chemistry, Kyoto University, Japan, and in February 2004, he joined the Institute of process engineering, Chinese Academy of Sciences In 2013, he was supported by the National Science Foundation for Distinguished Young Scholars In 2014, he was elected as a member of the Royal Society of chemistry In 2014, he was selected as the "young and middle-aged leading talents of science and technology innovation" of the Ministry of science and technology In 2014, he was awarded the China particle Society - winning and creating the particle science innovation award In 2015, he was awarded the second prize of Beijing Science and Technology Award (the second adult) In 2016, he was selected into the national "ten thousand talents plan" Leading talents were selected as experts enjoying special allowance of the State Council in 2018, first prize of natural science of China particle Society (the first adult) in 2018, and included in the list of "highly cited scientists" of clarivate analytics in 2018 Cutting edge scientific research achievements: Wang Dan, research group of the Institute of process engineering, Chinese Academy of Sciences, has published a series of pioneering works in the field of developing new catalysts by using two-dimensional carbon materials (small, 2012, 8, 265-271; ACS Nano, 2013, 7, 1504-1512; adv SCI., 2018, 5, 1800959 ）。 In the aspect of controlling doping sites, the research group introduced nitrogen atoms into the alkyne bond of graphite alkyne through the ring reaction (NAT Chem., 2018, 10, 924), which provided a new idea for material doping On the basis of this work, in order to further improve the catalytic performance of the catalyst, the research group doped nitrogen atom and sulfur atom into graphite alkyne By controlling the distance between nitrogen atom and sulfur atom, an efficient catalyst for oxygen precipitation reaction was developed (Figure 1) Fig 1 Electron micrograph of nitrogen and sulfur atom Co doped graphene (source: j.am Chem SOC.) the author first studied the local electronic structure of nitrogen and sulfur atom in graphene by synchrotron radiation absorption spectroscopy and X-ray photoelectron spectroscopy (Fig 2) In the K-edge absorption spectrum of nitrogen atom, the red shift peak belongs to sp-n In the L-edge absorption spectrum of sulfur atom, the peaks in 162-168ev range are - c-s-c - and - S = C - In the X-ray photoelectron spectroscopy, the nitrogen doping configuration is sp-n, pyri-n, amino-N and grap-n respectively, and the sulfur doping forms are S-C, s = C and s-o Fig 2 Synchrotron radiation absorption spectroscopy and X-ray photoelectron spectroscopy (source: j.am Chem SOC.), followed by characterization of oxygen precipitation activity of nitrogen and sulfur atom Co doped graphene (Fig 3) It is found that the properties of the samples obtained at 900 ℃ are better than those of commercial RuO2, with higher current density, lower overpotential and smaller Tafel slope The author has proved that the oxygen precipitation reaction is a four electron reaction by ring disk electrode test Figure 3 Oxygen precipitation performance of catalyst and commercial RuO 2 (source: j.am Chem SOC.) the author continued to test the oxygen precipitation performance of catalyst with different nitrogen and sulfur content (Figure 4) The results show that the current density increases with the increase of sp-n content when the S atom content is kept the same When the content of sp-n is the same, the current density increases with the content of S atom It shows that sp-n and S atoms play an active role in promoting oxygen precipitation Figure 4 Oxygen precipitation performance of catalysts with different nitrogen and sulfur contents (source: j.am Chem SOC.) finally, the density functional theory simulation calculation of the co doping system of nitrogen and sulfur atoms was carried out (Figure 5) It can be seen from the figure that the phase of sp-n and thio-s has the highest catalytic activity Figure 5 Simulation of the influence of different doping forms on the performance (source: j.am Chem SOC.) this achievement was recently published on j.am Chem SOC (j.am Chem SOC 2019 doi: 10.1021/jacs.8b13695) The authors of this paper are Yasong Zhao, Nailiang Yang, Huiying Yao, Daobin Liu, Li Song, Jia Zhu, Shuzhou Li, Lin Gu, Kaifeng Lin, Danwang The corresponding authors are Wang Dan, a researcher at the Institute of process engineering, Chinese Academy of Sciences, and Zhu Jia, a professor at Beijing Normal University The research work was supported by national key R & D plan (2016yff0600903), National Natural Science Foundation (21590795, 2182010, 2002), research equipment development project of Chinese Academy of Sciences (yz201623), Chinese Academy of Sciences Queensland cooperative Science Foundation (122111kysb20170001), and innovation cross team of Chinese Academy of Sciences Wang Dan research group homepage: http://www.wd-homes.cn/ review of previous reports: Wang Dan research group, Institute of process engineering, Chinese Academy of Sciences: design, preparation and energy storage application of SnO 2 hollow multi shell structure covered by MOFs derived metal oxide Today, science and technology elements are increasingly valued in economic life, China has ushered in the "node of science and technology explosion" Behind the progress of science and technology is the work of countless scientists In the field of chemistry, in the context of the pursuit of innovation driven, international cooperation has been strengthened, the influence of Returned Scholars in the field of R & D has become increasingly prominent, and many excellent research groups have emerged in China For this reason, CBG information adopts the 1 + X reporting mechanism CBG information, chembeangoapp, chembeango official microblog, CBG wechat subscription number and other platforms jointly launch the column of "people and scientific research", approach the domestic representative research group, pay attention to their research, listen to their stories, record their demeanor, and explore their scientific research spirit.