Preparation and activity of Cu/Zn/Al/Zr catalysts via hydrotalcite-containing precursors for methanol synthesis from CO2 hydrogenation

Peng Gao; Feng Li; Fukui Xiao; Ning Zhao; Nannan Sun; Wei Wei; Liangshu Zhong; Yuhan Sun

doi:10.1039/C2CY00481J

Preparation and activity of Cu/Zn/Al/Zr catalystsvia hydrotalcite-containing precursors for methanol synthesis from CO₂ hydrogenation

Peng Gao,^ab Feng Li,^a Fukui Xiao,^a Ning Zhao,^a Nannan Sun,^a Wei Wei,*^a Liangshu Zhong^c and Yuhan Sun*^ac

* Corresponding authors

^a State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, 030001 Taiyuan, PR China
E-mail: weiwei@sxicc.ac.cn, yhsun@sxicc.ac.cn
Fax: +86 351-4041153
Tel: +86 0351-4049612

^b Graduate University of the Chinese Academy of Sciences, 100049 Beijing, PR China

^c Low Carbon Conversion Center, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 201203 Shanghai, PR China

Abstract

A series of Cu/Zn/Al/Zr catalysts were synthesized by calcination of hydrotalcite-containing precursors with different Cu²⁺/Zn²⁺ atomic ratios (n). Two other catalysts (n = 2) were also prepared via phase-pure hydrotalcite-like and conventional rosasite precursors for comparison. XRD and UV-Vis-NIR DRS characterizations demonstrate that most Cu²⁺ of hydrotalcite-containing materials did not enter the layer structure. The Cu dispersion of the catalysts decreases with the increase of Cu content, while both the exposed Cu surface area and the Cu⁺ and Cu⁰ content on the reduced surface reach a maximum when n is 2. The catalytic performance for the methanol synthesis from CO₂ hydrogenation was also tested. The catalytic activity and selectivity of the catalysts (n = 0.5–4) via hydrotalcite-containing precursors rise first and then decrease with increasing Cu²⁺/Zn²⁺ ratios, and the optimum performance is obtained over the catalyst with Cu²⁺/Zn²⁺ = 2. Moreover, the Cu/Zn/Al/Zr catalyst (n = 2) via hydrotalcite-containing precursor exhibits the best catalytic performance, which is mainly due to the maximum content of active species compared with another two catalysts derived from different precursors.

Article information

https://doi.org/10.1039/C2CY00481J

Article type

Paper

Submitted

23 Nov 2011

Accepted

19 Mar 2012

First published

20 Mar 2012

Download Citation

Catal. Sci. Technol., 2012,2, 1447-1454

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Preparation and activity of Cu/Zn/Al/Zr catalysts via hydrotalcite-containing precursors for methanol synthesis from CO₂ hydrogenation

P. Gao, F. Li, F. Xiao, N. Zhao, N. Sun, W. Wei, L. Zhong and Y. Sun, Catal. Sci. Technol., 2012, 2, 1447 DOI: 10.1039/C2CY00481J

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Catalysis Science & Technology