State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
J Phys Chem Lett. 2023 Mar 2;14(8):2087-2091. doi: 10.1021/acs.jpclett.3c00085. Epub 2023 Feb 17.
A photoinduced radical reaction operated at low temperature can be used to remove trace CO from a H stream by minimizing the reverse water-gas shift. However, H consumption resulting from nonselective oxidation by hydroxyl radicals becomes an obstacle to practical hydrogen purification. Inspired by hydrogen exchange transfer, we demonstrate here that molecular hydrogen can promote H formation from hydrogen radicals, which are generated from the reaction of CO and H with hydroxyl radicals. The slight increment in H along with the radical reaction encouraged us to configure a photocatalytic hydrogen purification fixed-bed reactor, which can reduce CO to ≤1 ppm in the H stream.
在低温下进行光诱导自由基反应，可以通过最小化逆水汽变换来去除 H 气流中的痕量 CO。然而，由羟基自由基的非选择性氧化产生的 H 消耗成为实际氢气净化的障碍。受氢交换转移的启发，我们在这里证明了分子氢可以促进从 CO 和 H 与羟基自由基反应生成的氢自由基中生成 H。随着自由基反应的进行，H 的轻微增加促使我们配置了一个光催化氢气净化固定床反应器，可以将 H 气流中的 CO 降低到≤1ppm。
