A facile method for preparation of efficient oxygen reduction catalyst for a microbial fuel cell cathode

2017 ◽  
Vol 22 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Tae-Seon Choi ◽  
Young-Chae Song ◽  
Hudson Timothy
2018 ◽  
Vol 43 (1) ◽  
pp. 21-42 ◽  
Author(s):  
Guanchen Li ◽  
Michael R. von Spakovsky ◽  
Fengyu Shen ◽  
Kathy Lu

AbstractOxygen reduction in a solid oxide fuel cell cathode involves a nonequilibrium process of coupled mass and heat diffusion and electrochemical and chemical reactions. These phenomena occur at multiple temporal and spatial scales, making the modeling, especially in the transient regime, very difficult. Nonetheless, multiscale models are needed to improve the understanding of oxygen reduction and guide cathode design. Of particular importance for long-term operation are microstructure degradation and chromium oxide poisoning both of which degrade cathode performance. Existing methods are phenomenological or empirical in nature and their application limited to the continuum realm with quantum effects not captured. In contrast, steepest-entropy-ascent quantum thermodynamics can be used to model nonequilibrium processes (even those far-from equilibrium) at all scales. The nonequilibrium relaxation is characterized by entropy generation, which can unify coupled phenomena into one framework to model transient and steady behavior. The results reveal the effects on performance of the different timescales of the varied phenomena involved and their coupling. Results are included here for the effects of chromium oxide concentrations on cathode output as is a parametric study of the effects of interconnect-three-phase-boundary length, oxygen mean free path, and adsorption site effectiveness. A qualitative comparison with experimental results is made.


2011 ◽  
Vol 196 (24) ◽  
pp. 10611-10615 ◽  
Author(s):  
Xiaoling Yang ◽  
Jindan Lu ◽  
Yihua Zhu ◽  
Jianhua Shen ◽  
Zhen Zhang ◽  
...  

RSC Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 7761-7765 ◽  
Author(s):  
Lichao Jia ◽  
Kai Li ◽  
Dong Yan ◽  
Xin Wang ◽  
Bo Chi ◽  
...  

Pd clusters serve as active centers on the LSM surface and enhance the electron transference properties during oxygen reduction reactions.


2011 ◽  
Vol 26 (9) ◽  
pp. 3953-3957 ◽  
Author(s):  
Chunhua Feng ◽  
Qunyi Wan ◽  
Zhisheng Lv ◽  
Xianjun Yue ◽  
Yanfeng Chen ◽  
...  

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