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<p>Hydrogenolysis has emerged as a promising strategy for the chemical recycling of plastic waste, yet its reliance on high-pressure hydrogen poses significant challenges. Biomass- or CO<sub>2</sub>-derived formic acid (FA) is a renewable hydrogen carrier with the advantages of low toxicity and ease of storage and transport. Here, we use FA to replace high-pressure hydrogen to convert polyethylene (PE) into fuels and chemicals with only 4.1% gaseous products by a RuPt alloy catalyst. We demonstrate that the trace amounts of CO generated from the decomposition of FA do not poison the active sites, but rather induce the formation of Ru<sup>δ+</sup>, which facilitates the C–C bond cleavage during PE hydrogenolysis. This approach eliminates the need for high-pressure hydrogen and provides a more flexible and adaptable approach for decentralized plastic processing.</p>

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CO-promoted polyethylene hydrogenolysis with renewable formic acid as hydrogen donor

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月21日

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  • Yuqi Wang,
  • Qikun Hu,
  • Shuairen Qian,
  • Jiayang Zhao,
  • Yi Cheng,
  • Jun Ma,
  • Jing Zhang,
  • Zhiqiang Niu

摘要

Hydrogenolysis has emerged as a promising strategy for the chemical recycling of plastic waste, yet its reliance on high-pressure hydrogen poses significant challenges. Biomass- or CO2-derived formic acid (FA) is a renewable hydrogen carrier with the advantages of low toxicity and ease of storage and transport. Here, we use FA to replace high-pressure hydrogen to convert polyethylene (PE) into fuels and chemicals with only 4.1% gaseous products by a RuPt alloy catalyst. We demonstrate that the trace amounts of CO generated from the decomposition of FA do not poison the active sites, but rather induce the formation of Ruδ+, which facilitates the C–C bond cleavage during PE hydrogenolysis. This approach eliminates the need for high-pressure hydrogen and provides a more flexible and adaptable approach for decentralized plastic processing.