MSGID: 1:317/3 647ac1f7   
   PID: hpt/lnx 1.9.0-cur 2019-01-08   
   TID: hpt/lnx 1.9.0-cur 2019-01-08   
    Unveiling the nanoscale frontier: innovating with nanoporous model   
   electrodes    
      
     Date:   
         June 2, 2023   
     Source:   
         Tohoku University   
     Summary:   
         Researchers have introduced a next-generation model membrane   
         electrode that promises to revolutionize fundamental electrochemical   
         research.   
      
      
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   FULL STORY   
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   Researchers at Tohoku University and Tsinghua University have introduced a   
   next-generation model membrane electrode that promises to revolutionize   
   fundamental electrochemical research. This innovative electrode,   
   fabricated through a meticulous process, showcases an ordered array of   
   hollow giant carbon nanotubes (gCNTs) within a nanoporous membrane,   
   unlocking new possibilities for energy storage and electrochemical   
   studies.   
      
   The key breakthrough lies in the construction of this novel electrode. The   
   researchers developed a uniform carbon coating technique on anodic   
   aluminum oxide (AAO) formed on an aluminum substrate, with the barrier   
   layer eliminated.   
      
   The resulting conformally carbon-coated layer exhibits vertically aligned   
   gCNTs with nanopores ranging from 10 to 200 nm in diameter and 2 mm to   
   90 mm in length, covering small electrolyte molecules to bio-related   
   large matters such as enzymes and exosomes. Unlike traditional composite   
   electrodes, this self- standing model electrode eliminates inter-particle   
   contact, ensuring minimal contact resistance -- something essential for   
   interpreting the corresponding electrochemical behaviors.   
      
   "The potential of this model electrode is immense," stated Dr. Zheng-Ze   
   Pan, one of the corresponding authors of the study. "By employing the   
   model membrane electrode with its extensive range of nanopore dimensions,   
   we can attain profound insights into the intricate electrochemical   
   processes transpiring within porous carbon electrodes, along with   
   their inherent correlations to the nanopore dimensions."  Moreover, the   
   gCNTs are composed of low-crystalline stacked graphene sheets, offering   
   unparalleled access to the electrical conductivity within low- crystalline   
   carbon walls. Through experimental measurements and the utilization of   
   an in-house temperature-programmed desorption system, the researchers   
   constructed an atomic-scale structural model of the low-crystalline   
   carbon walls, enabling detailed theoretical simulations. Dr. Alex Aziz,   
   who carried out the simulation part for this research, points out,   
   "Our advanced simulations provide a unique lens to estimate electron   
   transitions within amorphous carbons, shedding light on the intricate   
   mechanisms governing their electrical behavior."  This project was   
   led by Prof. Dr. Hirotomo Nishihara, the Principal Investigator of   
   the Device/System Group at Advanced Institute for Materials Research   
   (WPI-AIMR). The findings are detailed in one of materials science's   
   top-level journal, " Advanced Functional Materials.   
      
   Ultimately, the study represents a significant step forward in our   
   understanding of amorphous-based porous carbon materials and their   
   applications in probing various electrochemical systems.   
      
       * RELATED_TOPICS   
             o Matter_&_Energy   
                   # Fuel_Cells # Graphene # Energy_and_Resources #   
                   Materials_Science   
             o Computers_&_Math   
                   # Computer_Modeling # Mathematical_Modeling # Mathematics   
                   # Neural_Interfaces   
       * RELATED_TERMS   
             o Quark o Model_rocket o Blue_Gene o Fuel_cell o Grid_computing   
             o Distributed_generation o Global_climate_model o   
             Computer_simulation   
      
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   Story Source: Materials provided by Tohoku_University. Note: Content   
   may be edited for style and length.   
      
      
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   Journal Reference:   
      1. Hongyu Liu, Zheng‐Ze Pan, Alex Aziz, Rui Tang, Wei Lv,   
      Hirotomo   
         Nishihara. Nanoporous Membrane Electrodes with an Ordered Array   
         of Hollow Giant Carbon Nanotubes. Advanced Functional Materials,   
         2023; DOI: 10.1002/adfm.202303730   
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   Link to news story:   
   https://www.sciencedaily.com/releases/2023/06/230602115054.htm   
      
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