scholarly journals Biomass-Derived Carbons as Versatile Materials for Energy-Related Applications: Capacitive Properties vs. Oxygen Reduction Reaction Catalysis

2021 ◽  
Vol 7 (3) ◽  
pp. 55
Author(s):  
Stefan Breitenbach ◽  
Nemanja Gavrilov ◽  
Igor Pašti ◽  
Christoph Unterweger ◽  
Jiri Duchoslav ◽  
...  

Biomass-derived carbons are very attractive materials due to the possibility of tuning their properties for different energy-related applications. Various pore sizes, conductivities and the inherent presence of heteroatoms make them attractive for different electrochemical reactions, including the implementation of electrochemical capacitors or fuel cell electrodes. This contribution demonstrates how different biomass-derived carbons prepared from the same precursor of viscose fibers can reach appreciable capacitances (up to 200 F g−1) or a high selectivity for the oxygen reduction reaction (ORR). We find that a highly specific surface area and a large mesopore volume dominate the capacitive response in both aqueous and non-aqueous electrolytic solutions. While the oxygen reduction reaction activity is not dominated by the same factors at low ORR overpotentials, these take the dominant role over surface chemistry at high ORR overpotentials. Due to the high selectivity of the O2 reduction to peroxide and the appreciable specific capacitances, it is suggested that activated carbon fibers derived from viscose fibers are an attractive and versatile material for electrochemical energy conversion applications.

Author(s):  
Shrish Nath Upadhyay ◽  
Srimanta Pakhira

The O2 reduction reaction (ORR) is one promising reaction in clean energy conversion systems such as fuel cells, metal-air batteries, electrochemical reactions, etc. Pt shows excellent electrocatalytic activities for ORR,...


2022 ◽  
Vol 301 ◽  
pp. 120785
Author(s):  
Xiaoliang Zhao ◽  
Xuezheng Yu ◽  
Shishan Xin ◽  
Shuai Chen ◽  
Chaosheng Bao ◽  
...  

2020 ◽  
Vol 44 (37) ◽  
pp. 15942-15950
Author(s):  
Ling Tao ◽  
Yang Yang ◽  
Fangke Yu

In this work, active carbon fibers (ACFs) were modified with nitrogen-doped porous carbon (NPC) and carbon nanotubes (CNTs) to prepare a novel modified electrode as a cathode.


Nanoscale ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 2532-2541 ◽  
Author(s):  
Jocelyn T. L. Gamler ◽  
Kihyun Shin ◽  
Hannah M. Ashberry ◽  
Yifan Chen ◽  
Sandra L. A. Bueno ◽  
...  

Pd-Based nanoparticles are excellent alternatives to the typically used Pt-based materials that catalyze fuel cell reactions.


2015 ◽  
Vol 3 (45) ◽  
pp. 22723-22729 ◽  
Author(s):  
Ziwu Liu ◽  
Xin Fu ◽  
Xianyong Wei ◽  
Feng Peng

Nitrogen and sulfur-codoped carbon nanotubes were synthesized with coal tar as nitrogen and sulfur precursors by employing the evocating agent of dicyandiamide. Resultant samples exhibited superior activities for the oxygen reduction reaction in both acidic and alkaline media.


2015 ◽  
Vol 3 (18) ◽  
pp. 9658-9667 ◽  
Author(s):  
Mian Li ◽  
Yueping Xiong ◽  
Xiaotian Liu ◽  
Ce Han ◽  
Yufan Zhang ◽  
...  

Fe/N/CNT@PCFs were prepared by simple pyrolysis of natural product catkin, FeCl3 and melamine and act as an excellent ORR catalyst.


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