Citation: FENG Yi-Na, ZENG Yi-Qiang, JIANG Wu, JI Wei-Jie. Controllable Synthesis of Pd/Cu_xCo_3-xO_n Interfaces for Highly Efficient Catalytic Combustion of Toluene[J]. Chinese Journal of Inorganic Chemistry, ;2019, 35(7): 1230-1238. doi: 10.11862/CJIC.2019.144 shu

Controllable Synthesis of Pd/Cu_xCo_3-xO_n Interfaces for Highly Efficient Catalytic Combustion of Toluene

Key Laboratory of Mesoscopic Chemistry, MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China

Corresponding author: JI Wei-Jie, jiwj@nju.edu.cn
Received Date: 12 March 2019
Revised Date: 24 April 2019

Figures(9)

The morphologically uniform Co₃O₄ hexagonal plates (h-Co₃O₄) with the dominantly exposed (112) facet were fabricated by a hydrothermal synthesis approach. Then Cu elemental doping was successfully applied to the h-Co₃O₄ substrate, and further controllable deposition of Pd nanoparticles with a narrow size distribution was achievevd. All the fabrication procedures were technically simplified and environmentally friendly, with high production efficiency. Among the various catalysts, the Pd/h-Cu_0.18Co_2.82O_n showed the lowest T₉₀ value (the reaction temperature at which the conversion rate of toluene reaches 90%) (198℃) for toluene combustion. The structural and physicochemical properties of catalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), N₂ adsorption-desorption (BET), hydrogen temperature programmed reduction (H₂-TPR), and X-ray photoelectron spectroscopy (XPS). The results showed that the specific surface area of the substrate decreased after the Cu doping into Co₃O₄, accompanying with the enriched surface defects (oxygen vacant sites) responsible for the enhanced capability of oxygen adsorption/activation and the abundant oxygen adspecies as a result. These characters ensured a promising catalyst performance comparable to that of noble metal-based catalysts. The surface dispersed Pd component was found to mainly exist in the form of PdO, and the Cu-doping of substrate further increased the oxidation state of Pd species, accounting for the existence of highly reactive oxygen species in a greater amount.
- catalytic combustion reaction,
- regular morphology,
- Co₃O₄,
- copper,
- palladium,
- toluene
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沈阳化工大学材料科学与工程学院沈阳 110142

Controllable Synthesis of Pd/CuxCo3-xOn Interfaces for Highly Efficient Catalytic Combustion of Toluene

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通讯作者: 陈斌, bchen63@163.com

Controllable Synthesis of Pd/Cu_xCo_3-xO_n Interfaces for Highly Efficient Catalytic Combustion of Toluene