Citation: Zhaoxiong Yan, Zhihua Xu, Lin Yue, Ling Shi, Linyong Huang. Hierarchical Ni-Al hydrotalcite supported Pt catalyst for efficient catalytic oxidation of formaldehyde at room temperature[J]. Chinese Journal of Catalysis, ;2018, 39(12): 1919-1928. doi: 10.1016/S1872-2067(18)63143-2 shu

Hierarchical Ni-Al hydrotalcite supported Pt catalyst for efficient catalytic oxidation of formaldehyde at room temperature

a Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Hubei Key Laboratory of Industrial Fume and Dust Pollution Control, Jianghan University, Wuhan 430056, Hubei, China;
b Key Laboratory for Processing and Application of Catalytic Materials, Huanggang Normal University, Huanggang 438000, Hubei, China

Received Date: 25 May 2018
Revised Date: 20 July 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (21577046, 21307038), Wuhan Morning Light Plan of Youth Science and Technology (2017050304010327) and the Opening Project of Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, Jianghan University (JDGD-201813).

Catalytic oxidation at room temperature is recognized as the most promising method for formaldehyde (HCHO) removal. Pt-based catalysts are the optimal catalyst for HCHO decomposition at room temperature. Herein, flower-like hierarchical Pt/NiAl-LDHs catalysts with different[Ni²⁺]/[Al³⁺] molar ratios were synthesized via hydrothermal method followed by NaBH₄ reduction of Pt precursor at room temperature. The flower-like hierarchical Pt/NiAl-LDHs were composed of interlaced nanoplates and metallic Pt nanoparticles (NPs) approximately 3-4 nm in diameter were loaded on the surface of the Pt/NiAl-LDHs with high dispersion. The as-prepared Pt/NiAl21 nanocomposite was highly efficient in catalyzing oxidation of HCHO into CO₂ at room temperature. The high activity of the hierarchical Pt/NiAl21 nanocomposite was maintained after seven recycle tests, suggesting the high stability of the catalyst. Based on in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) studies, a reaction mechanism was put forward about HCHO decomposition at room temperature. This work provides new insights into designing and fabricating high-performance catalysts for efficient indoor air purification.
- Hydrotalcite,
- NiAl-layered double hydroxides,
- Hierarchical structure,
- Catalytic oxidation,
- Formaldehyde removal
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