Direct H2O2 Synthesis, without H2 Gas,Journal of the American Chemical Society

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Direct H2O2 Synthesis, without H2 Gas
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2022-08-02 , DOI: 10.1021/jacs.2c03158
Aoxue Huang ₁ , Roxanna S Delima _{2,

3} , Yongwook Kim ₁ , Eric W Lees ₃ , Fraser G L Parlane _{1,

2} , David J Dvorak ₂ , Michael B Rooney ₁ , Ryan P Jansonius ₁ , Arthur G Fink ₁ , Zishuai Zhang ₁ , Curtis P Berlinguette _{1,

2,

3,

4}

Affiliation

We report here the direct hydrogenation of O₂ gas to form hydrogen peroxide (H₂O₂) using a membrane reactor without H₂ gas. Hydrogen is sourced from water, and the reactor is driven by electricity. Hydrogenation chemistry is achieved using a hydrogen-permeable Pd foil that separates an electrolysis chamber that generates reactive H atoms, from a hydrogenation chamber where H atoms react with O₂ to form H₂O₂. Our results show that the concentration of H₂O₂ can be increased ∼8 times (from 56.5 to 443 mg/L) by optimizing the ratio of methanol-to-water in the chemical chamber, and through catalyst design. We demonstrate that the concentration of H₂O₂ is acutely sensitive to the H₂O₂ decomposition rate. This decomposition rate can be minimized by using AuPd alloy catalysts instead of pure Pd. This study presents a new pathway to directly synthesize H₂O₂ using water electrolysis without ever using H₂ gas.

中文翻译：

直接 H2O2 合成，无需 H2 气

我们在此报告了使用没有 H ₂气体的膜反应器将 O ₂气体直接加氢以形成过氧化氢 (H ₂ O ₂ ) 。氢气来自水，反应堆由电力驱动。加氢化学是使用透氢 Pd 箔实现的，该箔将产生反应性 H 原子的电解室与 H 原子与 O ₂反应形成 H ₂ O ₂的加氢室隔开。我们的结果表明，H ₂ O _2的浓度通过优化化学室中甲醇与水的比例以及催化剂设计，可以将其提高 8 倍（从 56.5 到 443 mg/L）。我们证明了H 2 O 2 的浓度对H ₂ O ₂_分解速率_非常敏感。通过使用 AuPd 合金催化剂而不是纯 Pd，可以将这种分解速率降至最低。_{本研究提出了一种使用水电解直接合成 H 2} O ₂而无需使用 H ₂气体的新途径。

更新日期：2022-08-02

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