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Ambient Condition Alcohol Reforming to Hydrogen with Electricity Output
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-02-11 , DOI: 10.1021/acssuschemeng.0c07547 Zahid Manzoor Bhat 1 , Ravikumar Thimmappa 1 , Neethu Christudas Dargily 1 , Abdul Raafik 1 , Alagar Raja Kottaichamy 1 , Mruthyunjayachari Chattanahalli Devendrachari 1 , Mahesh Itagi 1 , Harish Makri Nimbegondi Kotresh 2 , Stefan A. Freunberger 3 , Musthafa Ottakam Thotiyl 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-02-11 , DOI: 10.1021/acssuschemeng.0c07547 Zahid Manzoor Bhat 1 , Ravikumar Thimmappa 1 , Neethu Christudas Dargily 1 , Abdul Raafik 1 , Alagar Raja Kottaichamy 1 , Mruthyunjayachari Chattanahalli Devendrachari 1 , Mahesh Itagi 1 , Harish Makri Nimbegondi Kotresh 2 , Stefan A. Freunberger 3 , Musthafa Ottakam Thotiyl 1
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“Hydrogen economy” could enable a carbon-neutral sustainable energy chain. However, issues with safety, storage, and transport of molecular hydrogen impede its realization. Alcohols as liquid H2 carriers could be enablers, but state-of-the-art reforming is difficult, requiring high temperatures >200 °C and pressures >25 bar, and the resulting H2 is carbonized beyond tolerance levels for direct use in fuel cells. Here, we demonstrate ambient temperature and pressure alcohol reforming in a fuel cell (ARFC) with a simultaneous electrical power output. The alcohol is oxidized at the alkaline anode, where the resulting CO2 is sequestrated as carbonate. Carbon-free H2 is liberated at the acidic cathode. The neutralization energy between the alkaline anode and the acidic cathode drives the process, particularly the unusually high entropy gain (1.27-fold ΔH). The significantly positive temperature coefficient of the resulting electromotive force allows us to harvest a large fraction of the output energy from the surrounding, achieving a thermodynamic efficiency as high as 2.27. MoS2 as the cathode catalyst allows alcohol reforming even under open-air conditions, a challenge that state-of-the-art alcohol reforming failed to overcome. We further show reforming of a wide range of alcohols. The ARFC offers an unprecedented route toward hydrogen economy as CO2 is simultaneously captured and pure H2 produced at mild conditions.
中文翻译：
环境条件下酒精重整为氢并输出电力
“氢经济”可以实现碳中和的可持续能源链。然而，分子氢的安全性，储存和运输问题阻碍了其实现。可以使用醇作为液态H 2载体，但是最先进的重整过程非常困难，需要高温> 200°C和压力> 25 bar，并且生成的H 2会碳化，超出允许水平，直接用于燃料中细胞。在这里，我们演示了在同时输出电力的情况下，燃料电池（ARFC）中的环境温度和压力酒精重整。所述醇在碱性阳极被氧化，在其中将所得的CO 2螯合为碳酸盐。无碳H 2在酸性阴极释放。碱性阳极和酸性阴极之间的中和能量推动了这一过程，特别是异常高的熵增益（1.27倍ΔH）。产生的电动势的显着正温度系数使我们能够从周围环境中收集大部分输出能量，从而实现高达2.27的热力学效率。MoS 2作为阴极催化剂，即使在露天条件下也可以进行醇重整，这是现有的醇重整无法克服的挑战。我们进一步展示了多种醇的重整。通过同时捕获CO 2和纯H 2，ARFC提供了一条通往氢经济的前所未有的途径 在温和的条件下产生的。
更新日期：2021-03-01
中文翻译：
环境条件下酒精重整为氢并输出电力
“氢经济”可以实现碳中和的可持续能源链。然而，分子氢的安全性，储存和运输问题阻碍了其实现。可以使用醇作为液态H 2载体，但是最先进的重整过程非常困难，需要高温> 200°C和压力> 25 bar，并且生成的H 2会碳化，超出允许水平，直接用于燃料中细胞。在这里，我们演示了在同时输出电力的情况下，燃料电池（ARFC）中的环境温度和压力酒精重整。所述醇在碱性阳极被氧化，在其中将所得的CO 2螯合为碳酸盐。无碳H 2在酸性阴极释放。碱性阳极和酸性阴极之间的中和能量推动了这一过程，特别是异常高的熵增益（1.27倍ΔH）。产生的电动势的显着正温度系数使我们能够从周围环境中收集大部分输出能量，从而实现高达2.27的热力学效率。MoS 2作为阴极催化剂，即使在露天条件下也可以进行醇重整，这是现有的醇重整无法克服的挑战。我们进一步展示了多种醇的重整。通过同时捕获CO 2和纯H 2，ARFC提供了一条通往氢经济的前所未有的途径 在温和的条件下产生的。
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