Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 13, Pages 5092-5101Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201914649
Keywords
direct formic acid fuel cells; formic acid oxidation; liquid crystal; mesoporosity; palladium electrocatalysts
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Funding
- National Natural Science Foundation for Excellent Young Scholar [51722403]
- National Natural Science Foundation of China [51801134, 51771134, U1601216]
- Tianjin Natural Science Foundation for Distinguished Young Scholar [18JCJQJC46500]
- National Youth Talent Support Program
- National Natural Science Foundation of Guangdong Province [U1601216]
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Developing superior electrocatalysts for formic acid oxidation (FAO) is the most crucial step in commercializing direct formic acid fuel cells. Herein, we electrodeposited palladium membranes with periodically ordered mesoporosity obtained by asymmetrically replicating the bicontinuous cubic phase structure of a lyotropic liquid-crystal template. The Pd membrane with the largest periodicity and highest degree of order delivered up to 90.5 m(2) g(-1) of electrochemical active surface area and 3.34 Amg(-1) electrocatalysis capability towards FAO, 3.8 and 7.8 times the values of the commercial Pd/C catalyst, respectively. By controlling the temperature and potential of the electrodeposition procedure, the periodicity area and order degree of the mesoporosity are highly tunable. These Pd membranes gave prototype formic acid fueled cells with 4.3 and 2.4 times the maximum current and power density of the commercial Pd/C catalyst.
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