A Membrane‐Free Neutral pH Formate Fuel Cell Enabled by a Selective Nickel Sulfide Oxygen Reduction Catalyst,Angewandte Chemie International Edition

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A Membrane‐Free Neutral pH Formate Fuel Cell Enabled by a Selective Nickel Sulfide Oxygen Reduction Catalyst
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2017-05-23 , DOI: 10.1002/anie.201702578
Bing Yan ₁ , Nolan M. Concannon ₁ , Jarrod D. Milshtein ₂ , Fikile R. Brushett ₃ , Yogesh Surendranath ₁

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Polymer electrolyte membranes employed in contemporary fuel cells severely limit device design and restrict catalyst choice, but are essential for preventing short‐circuiting reactions at unselective anode and cathode catalysts. Herein, we report that nickel sulfide Ni₃S₂ is a highly selective catalyst for the oxygen reduction reaction in the presence of 1.0 m formate. We combine this selective cathode with a carbon‐supported palladium (Pd/C) anode to establish a membrane‐free, room‐temperature formate fuel cell that operates under benign neutral pH conditions. Proof‐of‐concept cells display open circuit voltages of approximately 0.7 V and peak power values greater than 1 mW cm⁻², significantly outperforming the identical device employing an unselective platinum (Pt) cathode. The work establishes the power of selective catalysis to enable versatile membrane‐free fuel cells.

中文翻译：

选择性镍硫化氧还原氧催化的无膜中性pH格式燃料电池

现代燃料电池中使用的聚合物电解质膜严重限制了设备设计并限制了催化剂的选择，但是对于防止在非选择性阳极和阴极催化剂上发生短路反应而言，这是必不可少的。在此，我们报道了硫化镍Ni ₃ S ₂是在1.0 m甲酸存在下用于氧还原反应的高选择性催化剂。我们将这种选择性阴极与碳载钯（Pd / C）阳极相结合，以建立无膜，室温甲酸盐燃料电池，该燃料电池可在良性中性pH条件下运行。概念验证电池显示约0.7 V的开路电压，峰值功率值大于1 mW cm ^-2，其性能明显优于采用非选择性铂（Pt）阴极的相同器件。这项工作建立了选择性催化的能力，以实现通用的无膜燃料电池。

更新日期：2017-05-23

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