钠促进的铂/羟基磷灰石用于一氧化碳氧化  

Na-Promoted Pt/Hydroxylapatite for CO Oxidation

作　　者：钱晓霜 马臻[1] QIAN Xiaoshuang;MA Zhen(Department of Environmental Science and Engineering,Fudan University,Shanghai 200438,China)

机构地区：[1]复旦大学环境科学与工程系,上海200438

出　　处：《复旦学报（自然科学版）》2022年第6期709-715,共7页Journal of Fudan University：Natural Science

摘　　要：羟基磷灰石被用于载体来负载铂,铂的前驱体为Pt(NH_(3))_(4)(NO_(3))_(2)。NaOH也被浸渍到羟基磷灰石上,来研究NaOH的添加对催化性能的影响。研究结果表明,加入适量的NaOH能提高催化CO氧化的性能。催化性能提高的原因是反应中催化剂保持Pt^(0)和Pt^(2+)在所有Pt物种中的比例,保持表面羟基的浓度以及减少碱性位数量。Hydroxylapatite was used as a support to load Pt using Pt(NH_(3))_(4)(NO_(3))_(2) as a Pt source,and the effect of Na species on the performance of the catalyst was studied.It was found that the addition of a suitable amount of NaOH via impregnation can enhance the catalytic activity in CO oxidation.The catalysts were characterized to understand the reasons for the promotional effect.The promoting effect can be ascribed to maintaining the relative proportions of Pt^(0) and Pt^(2+)species,keeping the concentrations of surface hydroxyls and decreasing the amount of basic sites.

关 键 词：羟基磷灰石 铂 氢氧化钠 一氧化碳氧化 

分 类 号：O643.3[理学—物理化学]