A low temperature aqueous formate fuel cell using cobalt hexacyanoferrate as a non-noble metal oxidation catalyst,Sustainable Energy & Fuels

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A low temperature aqueous formate fuel cell using cobalt hexacyanoferrate as a non-noble metal oxidation catalyst
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-11-05 , DOI: 10.1039/d0se01398f
Lijuan Han _{1,

2,

3,

4,

5} , Jesús González-Cobos _{1,

2,

3,

4} , Irene Sánchez-Molina _{1,

2,

3,

4} , Stefano Giancola _{1,

2,

3,

4} , Scott J. Folkman _{1,

2,

3,

4} , S. Giménez _{4,

6,

7,

8} , A. Vidal-Ferran _{4,

9,

10,

11,

12} , José Ramón Galán-Mascarós _{1,

2,

3,

4,

12}

Affiliation

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 μW 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.

中文翻译：

使用六氰合铁酸钴作为非贵金属氧化催化剂的低温甲酸水溶液燃料电池

六氰合铁酸钴，钴铁普鲁士蓝衍生物（CoFePB），是一种有效，选择性和稳定的甲酸氧化电催化剂，在各种电解质条件下均具有强大的性能。在这项工作中，我们测试了CoFePB作为液体燃料电池中的非贵金属甲酸氧化催化剂，其中甲酸用作碳基水溶性氢载体。本文中，我们制造了两个概念验证的水性直接甲酸燃料电池。一种使用CoFePB作为甲酸氧化催化剂，与Pt偶联作为氧还原反应催化剂，并且提供67μWcm ^-2的最大功率密度。第二种基于碳毡作为阴极，Ce ⁴⁺作为末端电子受体，显示出稳定的最大功率输出，为8.6 mW cm ^-2。据我们所知，这是不含贵金属的直接甲酸氧化燃料电池的第一个示例。

更新日期：2020-11-06

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