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<p>In situations where oxygen is scarce or absent, such as during prolonged diving or high-altitude mountaineering, or in cases where breathing becomes impossible due to toxic substances like in fires or chemical, biological, or radiological incidents, a device that supplies a specific amount of oxygen is necessary for survival. A Manganese Oxide/Spherical Activated Carbon (Mn-SPAC) catalyst was produced for the purpose of creating a steady oxygen supply. This was achieved through the carbonization and activation of manganese-exchanged resin under nitrogen and steam conditions. The characteristics of Mn-SPAC were analyzed using pore characteristics analysis, XRD, FE-SEM, and XPS, focusing on the amount of added manganese and carbonization time. To optimize conditions for generating a consistent amount of oxygen, the synthesized catalyst was reacted with 30% hydrogen peroxide, and the amount of oxygen produced was measured. In the optimized reaction setup, a consistent oxygen release was monitored for a duration of 20&#xa0;min during the decomposition of hydrogen peroxide. Comparative XPS studies conducted pre- and post-reaction demonstrated the oxidation state of manganese following the process. These observations indicate that the newly developed catalyst is best suited for one-time use scenarios.</p>

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Constant flow oxygen generation with manganese oxide supported on spherical activated carbon using hydrogen peroxide decomposition

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Jae-Hoon Lee,
  • Eun-Hee Park,
  • Jae-Hong Shin,
  • Deog-Su Park,
  • Dong-Won Lee,
  • Sang-Kon Lee,
  • Jeong-Kwon Suh,
  • Yeon-Soo Hong

摘要

In situations where oxygen is scarce or absent, such as during prolonged diving or high-altitude mountaineering, or in cases where breathing becomes impossible due to toxic substances like in fires or chemical, biological, or radiological incidents, a device that supplies a specific amount of oxygen is necessary for survival. A Manganese Oxide/Spherical Activated Carbon (Mn-SPAC) catalyst was produced for the purpose of creating a steady oxygen supply. This was achieved through the carbonization and activation of manganese-exchanged resin under nitrogen and steam conditions. The characteristics of Mn-SPAC were analyzed using pore characteristics analysis, XRD, FE-SEM, and XPS, focusing on the amount of added manganese and carbonization time. To optimize conditions for generating a consistent amount of oxygen, the synthesized catalyst was reacted with 30% hydrogen peroxide, and the amount of oxygen produced was measured. In the optimized reaction setup, a consistent oxygen release was monitored for a duration of 20 min during the decomposition of hydrogen peroxide. Comparative XPS studies conducted pre- and post-reaction demonstrated the oxidation state of manganese following the process. These observations indicate that the newly developed catalyst is best suited for one-time use scenarios.