Insights into the high performance of Mn-Co oxides derived from metal organic frameworks for total toluene oxidation

JOURNAL OF HAZARDOUS MATERIALS

卷:349

Article

Luo, Yongjin¹  Zheng, Yingbin¹  Zuo, Jiachang¹  Feng, Xiaoshan¹  Wang, Xiuyun²  Zhang, Tianhua²  Zhang, Kai²  Jiang, Lilong² 

[1] Fujian Normal Univ, Fujian Key Lab Pollut Control & Resource Reuse, Fuzhou 350007, Fujian, Peoples R China

[2] Fuzhou Univ, Natl Engn Res Ctr Chem Fertilizer Catalyst, Fuzhou, Fujian, Peoples R China

关键词: Mn-Co oxides;    Metal-organic frameworks;    Nanocubes;    Toluene;    Catalytic oxidation;   

DOI  :  10.1016/j.jhazmat.2018.01.053

来源: Elsevier

【 摘 要 】

Mn-Co mixed metal oxide is considered as efficient catalyst for the total oxidation of volatile organic compounds. In this study, nanocube-like metal-organic frameworks (Mn-3[Co(CN)(6)](2)center dot nH(2)O) are adopted as the precursor to generate Mn-Co oxides with different Mn/Co molar ratios, which affect little on phase structure and textural properties. The obtained MOF-Mn1Co1 with uniform metal dispersion is rich in high valence of surface Mn4+ and Co3+ species, leading to high low-temperature catalytic activity of total toluene oxidation. The results of toluene-TPD followed by TPO and toluene-TPSR match well with the catalytic performances of MOF-Mn1Co1, MOF-Mn1Co2, and MOF-Mn2Co1, and in situ FITR proves that the benzoate route exists over MOF-Mn1Co1. It is found that a moderate ratio of Mn/Co (1:1) favors good low-temperature reducibility and high O-ads/O-latt, resulting in superior oxidation performance. However, the stability in the existence of water for MOF-Mn1Co1 is not satisfied, which should be overcome in the future.

【 授权许可】

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