Nitrate hydrogenation on Pd-Cu/TiO2 catalyst prepared by photo-deposition

被引：17

作者：

Yang, Decheng ^{[1
]}

Feng, Wei ^{[1
]}

Wu, Guangjun ^{[1
]}

Li, Landong ^{[1
]}

Guan, Naijia ^{[1
]}

机构：

[1] Nankai Univ, Key Lab Adv Energy Mat Chem, Minist Educ, Coll Chem, Tianjin 300071, Peoples R China

来源：

CATALYSIS TODAY | 2011年 / 175卷 / 01期

关键词：

Photo-deposition; Nitrate; Hydrogenation; Pd-Cu/TiO2; PALLADIUM-BASED CATALYSTS; CU BIMETALLIC CATALYST; PD-CU; DRINKING-WATER; ACTIVE-CARBON; PD/TIO2; CATALYSTS; REDUCTION; NITRITE; SUPPORT; HYDRODECHLORINATION;

D O I：

10.1016/j.cattod.2011.03.031

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Bimetallic Pd-Cu/TiO2 is prepared by successive photo-deposition process and characterized by means of TEM, H-2-TPR and FTIR spectra of CO adsorption. The as-prepared Pd-Cu/TiO2 is studied as promising catalyst for nitrate hydrogenation and a step-wise reaction process, divided into nitrate hydrogenation to nitrite and nitrite hydrogenation to nitrogen, is observed. The active sites for nitrate and nitrite hydrogenation over Pd-Cu/TiO2 are discussed individually. It is observed that basic conditions of reaction solution favor the hydrogenation of nitrate to nitrite, while acidic conditions favor the hydrogenation of nitrite to nitrogen. For nitrite hydrogenation, acetic acid is more efficient acidic buffer than hydrochloric acid due to an in situ buffering effect. Based on these results, a two-step process, by changing the reaction solution from basic conditions to acidic conditions at midterm, is developed to realize the hydrogenation of nitrate to nitrogen over bimetallic Pd-Cu/TiO2. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：356 / 361

页数：6

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