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Ying Zhu

Beihang University, China

Title: Hierarchical conducting polymers micro/nanostructures and their electrochemical energy conversion

Biography

Biography: Ying Zhu

Abstract

The heterocyclic conjugated polymers, including polyaniline (PANI), polypyrrole (PPy) , and poly(3,4-ethylenedioxythiophene) (PEDOT), have recently been investigated as inexpensive electro-catalysts because of their low cost, high electronic conductivity, and distinct redox properties. Generally speaking, these polymers can act as electrochemical catalysts in the following three ways: 1) as catalysts on their own, 2) as precursors for pyrolyzed M-Nx/C catalysts, and 3) as matrix for entrapping non-precious metals, 4) Conducting polymers with its micro/nanostructures over a large surface area can itself be an outstanding intrinsic electrochemical catalyst. We have developed a new class of efficient non-precious-metal ORR catalysts by doping PEDOT with hemin via a one-step self-assembling mothod. It is demonstrated that the hemin-induced synergistic effect results a very high 4-electron oxygen reduction reaction (ORR) activity, a better stability, and free-from methanol crossover effect even in a neutral phosphate buffer solution due to hemin molecular characteristic, in which the iron centre of Fe-N 4 –C served for ORR, while the carboxyl groups used dopant for conducting PEDOT. Moreover, PANI nanofibers fabricated by electrochemical polymerization of aniline can act as a solid-state polymeric mediator for bacterial extracellular electron transfer (EET), which enables not only the dramatically enhanced EET current at a certain potential but also tunable EET behavior in a controlled manner.

Recent Publications

  1. Chunmei Ding, Huan Liu, Ying Zhu*, Meixiang Wan, Lei Jiang (2012) Energy Environ. Sci., 5:8517-8522
  2. Z. Guo, H. Liu, C. Jiang, Y. Zhu*, M. Wan, L. Dai, L. Jiang (2014) Small, 10:2087-2095.
  3. Guangyuan Ren, Yunan Li, Zhaoyan Guo, Guozheng Xiao, Ying Zhu*, Liming Dai, Lei Jiang, (2015)Nano Research, 8: 3461-3471.
  4. Chun-mei Ding, Mei-ling Lv, Ying Zhu, Lei Jiang, and Huan (2015) Angew. Chem. Int. Ed. 54:1446-1451.
  5. Zhaoyan Guo, Guangyuan Ren, Congcong Jiang, Xianyong Lu, Ying Zhu*, Lei Jiang, Liming Dai (2015) Scientific Reports, 5:17064.
  6. Zhaoyan Guo, Zhen Xiao, Guangyuan Ren, Guozheng Xiao, Ying Zhu*, Liming Dai* and Lei Jiang (2016) Nano Research, 9:1244-1255.