文献类型：期刊文献

英文题名：Ambient temperature NO oxidation over Cr-based amorphous mixed oxide catalysts: effects from the second oxide components

作者：Wang, Aiyong[1,2];Lin, Bo[1];Zhang, Hanlei[3,4];Engelhard, Mark H.[5];Guo, Yanglong[1];Lu, Guanzhong[1];Peden, Charles H. F.[2];Gao, Feng[2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[2]Pacific Northwest Natl Lab, Inst Integrated Catalysis, Richland, WA 99352 USA;[3]SUNY Binghamton, Mat Sci & Engn Program, Binghamton, NY 13902 USA;[4]SUNY Binghamton, Mech Dept, Binghamton, NY 13902 USA;[5]Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA

年份：2017

卷号：7

期号：11

起止页码：2362

外文期刊名：CATALYSIS SCIENCE & TECHNOLOGY

收录：;EI(收录号：20172903959734);WOS:【SCI-EXPANDED(收录号:WOS:000403002700023)】；

基金：This work was supported by the National Basic Research Program of China (2013CB933200), the National Natural Science Foundation of China (21577035, 21577034), the Commission of Science and Technology of Shanghai Municipality (15DZ1205305) and the 111 Project (B08021). Aiyong Wang gratefully acknowledges the China Scholarship Council for the Joint-Training Scholarship Program with the Pacific Northwest National Laboratory (PNNL). PNNL is operated for the U.S. Department of Energy (DOE) by Battelle. FG and CHFP are supported by the U.S. DOE/Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office. Part of the research was performed using EMSL, a DOE Office of Science User Facility sponsored by the Office of Biological and Environmental Research.

语种：英文

外文关键词：Sol-gel process - Catalyst activity - Sol-gels - Chromium compounds - Binary alloys - Metals - Nickel oxide

摘要：Three series of Cr-based mixed oxides (Cr-Co, Cr-Fe, and Cr-Ni oxides) with high specific surface areas and amorphous textures were synthesized using a novel sol-gel method. These mixed oxides, in comparison to their pure metal oxide (CrOx, Co3O4, FeOx and NiO) counterparts, display enhanced performance for catalytic oxidation of low-concentration NO at room temperature. The best performing catalysts achieve 100% NO conversion for similar to 30 h of operation at a high space velocity of 45000 ml g(-1) h(-1). The amorphous structure was found to be critical for these catalysts to maintain high activity and durability. Control of the Cr/M (M = Co, Fe and Ni) molar ratio, nitrate precursor decomposition temperature and catalyst calcination temperature was key to the synthesis of these highly active catalysts.