期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 11, 页码 12938-12948出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c02866
关键词
solid carbon; chemisorption; anode; hybrid direct carbon fuel cell; perovskite oxide; energy conversion
资金
- National Natural Science Foundation of China [21376001, 21576028, 21506012]
In this work, we investigate a novel A-site ordered layered perovskite oxide, (PrBa)(0.95)Fe1.8-xCuxNb0.2O5+delta (PBFCN), as an anode material for hybrid direct carbon fuel cells (HDCFCs). We study the effect of anode composition on the electrochemical performance of HDCFCs. The electrolyte-supported single cell with (PrBa)(0.95)Fe1.4Cu0.4Nb0.2O5+delta (PBFCu0.4N) anode achieves the highest peak power density of 431 mW cm(-2) at 800 degrees C with activated carbon as the fuel. Moreover, a power generation unit is also made to demonstrate the practical utilization of PBFCN, which delivers a peak power of 0.51 W at 800 degrees C without any carrier gas, and a small fan can operate for more than 10 h by using the as-fabricated HDCFC as a power generation unit. The PBFCN anode achieves greatly enhanced catalytic activity by improving the chemical adsorption and electrochemical oxidation of CO at the anode/CO interface, which is mainly due to the high-activity Cu ions in PBFCN. The inactive element Nb doping and ordered layered structure endow the material with excellent redox structural stability. The present study provides a new idea for the design and development of high-performance anode materials for HDCFCs applications.
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