Wyss Kevin M, Silva Karla J, Bets Ksenia V, Algozeeb Wala A, Kittrell Carter, Teng Carolyn H, Choi Chi Hun, Chen Weiyin, Beckham Jacob L, Yakobson Boris I, Tour James M
Department of Chemistry, Rice University, 6100 Main Street, Houston, TX, 77005, USA.
Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, TX, 77005, USA.
Adv Mater. 2023 Nov;35(48):e2306763. doi: 10.1002/adma.202306763. Epub 2023 Oct 25.
Hydrogen gas (H ) is the primary storable fuel for pollution-free energy production, with over 90 million tonnes used globally per year. More than 95% of H is synthesized through metal-catalyzed steam methane reforming that produces 11 tonnes of carbon dioxide (CO ) per tonne H . "Green H " from water electrolysis using renewable energy evolves no CO , but costs 2-3× more, making it presently economically unviable. Here catalyst-free conversion of waste plastic into clean H along with high purity graphene is reported. The scalable procedure evolves no CO when deconstructing polyolefins and produces H in purities up to 94% at high mass yields. The sale of graphene byproduct at just 5% of its current value yields H production at a negative cost. Life-cycle assessment demonstrates a 39-84% reduction in emissions compared to other H production methods, suggesting the flash H process to be an economically viable, clean H production route.
氢气（H₂）是用于无污染能源生产的主要可储存燃料，全球每年使用量超过9000万吨。超过95%的氢气是通过金属催化蒸汽甲烷重整合成的，每吨氢气会产生11吨二氧化碳（CO₂）。利用可再生能源进行水电解产生的“绿色氢气”不产生二氧化碳，但成本高出2至3倍，目前在经济上不可行。本文报道了在无催化剂的情况下将废塑料转化为清洁氢气以及高纯度石墨烯的过程。该可扩展工艺在解构聚烯烃时不产生二氧化碳，并且在高质量产率下能产生纯度高达94%的氢气。将石墨烯副产品按其当前价值的仅5%出售，就能使氢气生产成本为负。生命周期评估表明，与其他氢气生产方法相比，排放量减少了39%至84%，这表明闪速制氢工艺是一条经济可行的清洁氢气生产路线。
