文献类型：期刊文献

英文题名：Hydrogenation-dechlorination of 2-chloro-4,6-dinitroresorcinol over Pd/C catalysts

作者：Li, Xinzheng[1];Qin, Feng[1];Dai, Qiguang[1];Shao, Shijie[1];Wang, Xingyi[1]

机构：[1]East China Univ Sci & Technol, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China

年份：2018

卷号：44

期号：10

起止页码：6087

外文期刊名：RESEARCH ON CHEMICAL INTERMEDIATES

收录：;EI(收录号：20182205241116);WOS:【SCI-EXPANDED(收录号:WOS:000444600400023)】；

基金：The authors are grateful to Mrs. Xingxing Jiang for helpful discussions during the revision process. We would like to acknowledge the National Key Research and Development Program of China (no. 2016YFC0204300) and National Natural Science Foundation of China (nos. 21477036 and 21777043).

语种：英文

外文关键词：Hydrogenation; Hydrodechlorination; Pd; C catalysts; Solvent effect; 4,6-Diaminoresorcinol

摘要：Pd catalysts supported on active carbon (Pd/C) prepared by impregnation-deposition were used in catalytic hydrogenation and hydrodechlorination (HDC) of 2-chloro-4,6-dinitroresorcinol (CDNR). Characterization by X-ray diffraction, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy, and transmission electron microscopy revealed Pd species in the form of similar to 3.0-nm Pd nanoparticles composed of Pd-0 and Pdn+ dispersed highly on active carbon. Pd/C catalysts with high Pd-0/(Pd-0+Pdn+) exhibited high active for hydrogenation of CDNR, while the yield of the target product 4,6-diaminoresorcinol (DAR) largely depended on the solvent media. The correlations of the dielectric constants of the solvents with the activity and selectivity were obtained. Alkanol or acetic acid aqueous solutions were favorable for HDC. No 2-chloro-4,6-diaminoresorcinol product was detected when the reaction was carried out using 80% ethanol/water media. XPS, energy-dispersive spectroscopy, and high-resolution transmission electron microscopy revealed that strong Cl adsorption caused the decrease in activity and selectivity for DAR of the Pd/C catalysts.