Direct Synthesis of Pure Aqueous H2O2 Solution within Aluminosilicate Zeolite Crystals,ACS Catalysis

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Direct Synthesis of Pure Aqueous H2O2 Solution within Aluminosilicate Zeolite Crystals
ACS Catalysis ( IF 11.3 ) Pub Date : 2021-01-29 , DOI: 10.1021/acscatal.0c05103
Zhu Jin _{1,

2} , Yifeng Liu ₂ , Liang Wang ₁ , Chengtao Wang ₂ , Zhiyi Wu ₃ , Qiuyan Zhu ₂ , Lingxiang Wang ₂ , Feng-Shou Xiao _{1,

2,

3}

Affiliation

The synthesis of H₂O₂ generally requires multiple mixed organic solvents and/or halide additives, causing complexity in purification. Herein, we overcome this problem by direct synthesis of H₂O₂ in aqueous solution using AuPd nanoparticles fixed within the aluminosilicate zeolite crystals as a catalyst. The AuPd nanoparticles catalyzed the oxygen hydrogenation to form H₂O₂ in zeolite crystals via a zeolite-assisted proton transfer process. In addition, the protons also stabilize the H₂O₂ product against the deprotonation that causes H₂O₂ decomposition. The H₂O₂ productivity reached 320 mmol g_AuPd^–1 h^–1 with a H₂ selectivity of 88% in water, showing significant advances compared with the conventionally supported metal nanoparticle catalysts. These findings highlight the zeolite fixed structure that offers a new way for designing efficient catalysts in H₂O₂ synthesis.

中文翻译：

在硅铝酸盐沸石晶体中直接合成纯H ₂ O ₂水溶液

H ₂ O ₂的合成通常需要多种混合的有机溶剂和/或卤化物添加剂，从而导致纯化的复杂性。本文中，我们通过使用固定在铝硅酸盐沸石晶体中的AuPd纳米颗粒作为催化剂，通过在水溶液中直接合成H ₂ O ₂来克服此问题。AuPd纳米颗粒通过沸石辅助的质子转移过程催化氧氢化以在沸石晶体中形成H ₂ O ₂。另外，质子还使H ₂ O ₂产物稳定以防止引起H ₂ O ₂分解的去质子化。H ₂O _2的生产率达到320 mmol g _AuPd^–1 h ^–1，在水中的H ₂选择性为88％，与常规负载的金属纳米颗粒催化剂相比，显示出显着的进步。这些发现突出了沸石的固定结构，该结构为设计H ₂ O ₂合成中的高效催化剂提供了新途径。

更新日期：2021-02-19

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