Journal
SUSTAINABLE ENERGY & FUELS
Volume 4, Issue 12, Pages 6227-6233Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0se01398f
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Funding
- Spanish Ministerio de Ciencia e Innovacion [RTI2018-095618-B-I00]
- Generalitat de Catalunya [2017-SGR-1406]
- CERCA Programme
- Marie Sklodowska-Curie Actions [754510, 895296]
- Fulbright
- Marie Curie Actions (MSCA) [895296] Funding Source: Marie Curie Actions (MSCA)
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Cobalt hexacyanoferrate, the Co-Fe Prussian blue derivative (CoFePB), is an effective, selective and stable electrocatalyst for formate oxidation, exhibiting robust performance under a variety of electrolyte conditions. In this work, we test CoFePB as a non-noble-metal formate oxidation catalyst in a liquid fuel cell, with formate acting as a carbon-based, water soluble, hydrogen carrier. Herein we fabricate two proof-of-concept aqueous direct formate fuel cells. One uses CoFePB as a formic acid oxidation catalyst coupled with Pt as an oxygen reduction reaction catalyst and delivers a maximum power density of 67 mu W cm(-2). The second one, based on carbon felt as a cathode and Ce4+ as a terminal electron acceptor, shows a stable maximum power output of 8.6 mW cm(-2). This is, to our knowledge, the first example of a noble-metal-free direct formate oxidation fuel cell.
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