以HKUST-1为前驱体的Cu@Pt/C催化剂的结构及对甲醇的催化氧化性能研究

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Abstract Copper nitrate and trimesic acid were used as raw materials to fabricate octahedral HKUST-1 by hydrothermal method. HKUST-1 was calcined in Ar protective atmosphere and Cu/C nanoparticles were derived through carbothermal reduction reaction. The Cu@Pt/C catalyst was obtained by soaking Cu/C in potassium chloroplatinic acid solution by galvanic displacement. The morphology and microstructure of Cu@Pt/C catalyst as well as its electrocatalytic activity towards methanol were further characterized by SEM, XRD, XPS and cyclic voltammetry (CV). The results show that the as-prepared Cu@Pt/C catalyst retains special octahedral structure of HKUST-1 and has a core-shell structure formed by Pt coating on the surface of Cu. The electrochemically active surface areas (ECSA) measured by cyclic voltammetry curves in H₂SO₄ solution is 74.3 m²/g, about 1.47 times as much as that of commercial Pt/C. The cyclic voltammetry curves in H₂SO₄+CH₃OH solution shows the ratio of positive sweep peak current density to reverse sweep peak current density J_f/J_b is 2.18, which is much higher than that of commercial Pt/C. Thus Cu@Pt/C catalyst has better electrocatalytic activity to methanol oxidation and better CO tolerance.

Key words： core-shell structure methanol oxidation electrocatalysis metal-organic framework galvanic replacement

Received: 18 December 2018 Published: 11 July 2019

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	LONG Xiangyu
	LEI Ting
	WANG Kunchan
	ZHAN Zhenxiang

Cite this article:

LONG Xiangyu,LEI Ting,WANG Kunchan, et al. Structure of Cu@Pt/C catalyst derived from HKUST-1 and its catalytic activity for methanol oxidation[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(3): 289-295.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I3/289

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