News News
Contact us
  • Customer service number:64321087
  • Commercial service telephone:13918059423
  • Technical service telephone:13918059423
  • Contact person: Mr. Cui 
  • Service email:shxtb@163.com
  • Address: room 107, building 8, no. 100, guilin road, xuhui district, Shanghai

The Mechanisms Behind Cobalt X-ide Electrocatalysts

The date of: 2024-09-11
viewed: 0
source:TOHOKU UNIVERSITY


The unsung heroes of electrochemical reactions - electrocatalysts - can assist in optimizing factors such as the reaction's speed, yield, and energy consumption. As such, these electrocatalysts are crucial for optimizing large-scale production in pharmaceutical, agrochemical, and petrochemical industries. Researchers at Tohoku University and Nanjing Normal University conducted a deep dive on the performance of an emerging category of electrocatalysts: cobalt oxides (henceforth referred to as Co X-ides).
The research team sought to use Co X-ides for the electrocatalytic hydrogenation of quinoline (ECHQ). This process is an attractive alternative to other methods, as it can be conducted under ambient temperatures and can result in a net zero carbon footprint. In comparison, conventional methods to hydrogenate quinoline release undesirable byproducts, and require the storage and transportation of highly flammable hydrogen - which is equal parts dangerous and costly.
"Previous research on ECHQ focused more on the optimization of catalytic activity, whereas for ECHQ reaction mechanisms and reaction path explorations, we might as well be starting with a blank page," explains Tianyi Wang from Tohoku University's Advanced Institute for Materials Research (WPI-AIMR).
"One goal of this study was to try and find which Co X-ide was "the best" one," says Hao Li of WPI-AIMR, "However, we also need to be able to understand why certain catalysts perform differently."
It was found that among selected Co X-ides, Co3O4 was the winner. It demonstrated the best ECHQ performance with a high conversion of 98.2% and selectivity of 100% under ambient conditions. The Co3O4 sites present a higher proportion of 2-coordinated hydrogen-bonded water at the interface than other Co X-ides at a low negative potential, which enhances the kinetics of subsequent water dissociation to produce H*.
In comparison, the Co9S8 sites displayed the lowest ECHQ performance due to the high thermodynamic barrier in the H* formation step, which suppressed subsequent hydrogenation. Co(OH)F and CoP sites also had a low conversion of quinoline, due to high desorption barriers.
This study will help significantly advance our understanding of the catalytic mechanisms in ECHQ. These findings were published in Advanced Materials on September 2, 2024.



Hot News / Related to recommend
  • 2024 - 10 - 11
    Click on the number of times: 0
    source:EosDrylands cover over 40% of the Earth’s land surface and house more than 2 billion people, many of whom rely on drylands for subsistence needs. Vegetation dynamics in drylands are often chara...
  • 2024 - 10 - 10
    Click on the number of times: 0
    source:NININGVolcanoes with iron-rich magmas may hold significant concentrations of rare earth elements (REEs), according to a study published in Geochemical Perspectives Letters.As reported by Eos ma...
  • 2024 - 10 - 09
    Click on the number of times: 0
    source:SMALL CAPSDreadnought Resources (ASX: DRE) is the latest Australian minerals explorer to uncover significant niobium potential as the market sharpens its focus on the critical metal.New explora...
  • 2024 - 10 - 08
    Click on the number of times: 0
    source:Rice UniversityA research team led by Rice University's James Tour has developed a method to recycle valuable metals from electronic waste more efficiently while significantly reducing the ...
  • Copyright ©Copyright 2018 2020 Shanghai rare earth association All Rights Reserved Shanghai ICP NO.2020034223
    the host:Shanghai Association of Rare Earth the guide:Shanghai Development and Application Office of Rare Earth the organizer:Shanghai rare earth industry promotion center
    犀牛云提供云计算服务