Trace Pt-loading transition metal hydroxides as efficient catalyst for vaporized hydrogen peroxide decomposition

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL Applied Catalysis A: General Pub Date : 2024-07-18 DOI:10.1016/j.apcata.2024.119883

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Abstract

Vaporized hydrogen peroxide (VHP) holds great promise for the decontamination of space environment. Nevertheless, following the decontamination process, highly concentrated VHP within confined spaces is harmful to the human body. Hence, trace Pt-loading (0.57 wt%) transition metal hydroxides nanosheets anchored on Ni foam (Pt@NiAlCrFe-LDHs/NF) were prepared for VHP decomposition. Importantly, a strong electronic interaction between NiAlCrFe layer double hydroxides (NiAlCrFe-LDHs) and Pt was evidenced by XPS. Meanwhile, unique nanosheet-like morphology and rich mesoporous structure endow the catalyst with excellent performance. The catalytic activity of Pt@NiAlCrFe-LDHs/NF is approximately twice that of NiAlCrFe-LDHs/NF and seven times that of Pt/NF. The improved catalytic efficiency of Pt@NiAlCrFe-LDHs/NF results from the reduction in energy barrier for VHP decomposition reaction caused by the introduction of trace Pt. After ten recycling experiments, this catalyst still shows good durability with no significant deterioration in VHP decomposition efficiency. Finally, the growth mechanism of Pt@NiAlCrFe-LDHs/NF was also proposed and discussed.

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痕量铂负载过渡金属氢氧化物作为气化过氧化氢分解的高效催化剂

蒸发过氧化氢（VHP）在空间环境净化方面大有可为。然而，在净化过程中，密闭空间内高浓度的过氧化氢对人体有害。因此，研究人员制备了锚定在镍泡沫上的微量铂负载（0.57 wt%）过渡金属氢氧化物纳米片（Pt@NiAlCrFe-LDHs/NF），用于分解 VHP。重要的是，XPS 证实了 NiAlCrFe 层双氢氧化物（NiAlCrFe-LDHs）与铂之间强烈的电子相互作用。同时，独特的纳米片状形貌和丰富的介孔结构赋予了催化剂优异的性能。Pt@NiAlCrFe-LDHs/NF 的催化活性大约是 NiAlCrFe-LDHs/NF 的两倍，是 Pt/NF 的七倍。Pt@NiAlCrFe-LDHs/NF 催化效率的提高源于痕量铂的引入降低了 VHP 分解反应的能障。经过十次循环实验后，这种催化剂仍然表现出良好的耐久性，VHP 分解效率没有明显下降。最后，还提出并讨论了 Pt@NiAlCrFe-LDHs/NF 的生长机制。

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.