Alkaline Fuel Cells with Novel Gortex‐Based Electrodes are Powered Remarkably Efficiently by Methane Containing 5% Hydrogen
Alkaline Fuel Cells with Novel Gortex‐Based Electrodes are Powered Remarkably Efficiently by Methane Containing 5% Hydrogen
复制标题
具有新型 Gortex 电极的碱性燃料电池由含 5% 氢的甲烷提供非常高效的动力
DOI：
10.1002/aenm.201702285
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发表时间：
2018
影响因子：
27.8
通讯作者：
G. Wallace
中科院分区：
文献类型：
--
作者：
K. Wagner;P. Tiwari;G. Swiegers;G. Wallace
许多电力和天然气公用事业公司都在积极追求“电力制气”技术，这种技术包括利用多余的可再生能源制造氢气(H2)，然后以5%-10%的体积注入现有的天然气管道网络。这项工作报告了一种碱性燃料电池，它有可能利用这种混合气体用于下游发电。该燃料电池采用了新型的Gortex电极，电极上覆盖了Pd/Pt催化剂，当以含5%氢的甲烷(CH4)为燃料时，发电效率非常高。甲烷是天然气的主要成分。利用塔菲尔图和电化学阻抗谱对燃料电池在一定氢甲烷比范围内的性能进行了研究。这些表明，就基本操作而言，令人惊讶的是，使用纯氢气和甲烷中5%的氢气作为燃料几乎没有区别。Gortex电极和碱性电解液显然能够以显著的效率利用稀氢作为燃料。甲烷作为一种惰性载气，不会被消耗。
Numerous electric and gas utilities are actively pursuing “power‐to‐gas” technology, which involves using unwanted, excess renewable energy to manufacture hydrogen gas (H2) that is then injected into the existing natural gas pipeline network in 5–10% by volume. This work reports an alkaline fuel cell that has the potential to harness such gas mixtures for downstream generation of electric power. The fuel cell, which employs novel Gortex‐based electrodes layered with Pd/Pt catalysts, generates electricity remarkably efficiently when fuelled with methane (CH4) containing 5% hydrogen. Methane constitutes the major component of natural gas. The fuel cell has been studied over a range of hydrogen to methane ratios using Tafel plots and electrochemical impedance spectroscopy. These show that, in terms of fundamental operation, there is, astonishingly, almost no difference between using pure hydrogen and 5% hydrogen in methane, as the fuel. The Gortex electrodes and alkaline electrolyte are clearly able to utilize the dilute hydrogen as a fuel with remarkable efficiency. The methane acts as an inert carrier gas and is not consumed.