{'fraction_non_alphanumeric': 0.03765690376569038, 'fraction_numerical': 0.019246861924686193, 'mean_word_length': 4.411764705882353, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Nanosized Au Catalysts Supported on Mg(OH)2-CeO2 for Preferential Oxidation of CO in Hydrogen Stream

Preferential oxidation of carbon monoxide in the 
presence of hydrogen (PROX) is a promising method to 
remove CO from a hydrogen-containing gas mixture. Nanosized gold catalyst 
supported on CeO2 and modified with Mg(OH)2 was used for 
preferential oxidation of carbon monoxide in hydrogen-rich stream in this 
study. Mg(OH)2 was added on CeO2 by incipient-wetness 
impregnation. Au was loaded on Mg(OH)2-CeO2 by 
deposition-precipitation method. PROX reaction was carried out in a continuous 
flow, fixed bed reactor. CO/O2 feed ratio was fixed at 1 to magnify 
the difference of various catalysts. The catalysts were characterized by N2 sorption, TEM, HR-TEM and XPS. Mg(OH)2 formed a thin layer on the 
surface of CeO2. CeO2 was in the crystalline phase and 
Mg(OH)2 was amorphous. Au particles were homogeneously dispersed on 
the support with a size of 2 - 5 nm. Using CeO2 as a support could increase the dispersion of Mg(OH)2 and thus increase the 
interaction between Au and Mg(OH)2. Adding Mg(OH)2 on Au/CeO2 could 
suppress H2 oxidation and therefore increase CO oxidation activity.