Highly dispersed and active supported Pt nanoparticles for gaseous formaldehyde oxidation: Influence of particle size
Highly dispersed and active supported Pt nanoparticles for gaseous formaldehyde oxidation: Influence of particle size
复制标题
用于气态甲醛氧化的高度分散和活性负载的 Pt 纳米粒子：粒径的影响
DOI：
10.1016/j.cej.2014.04.108
复制
发表时间：
2014-09-15
影响因子：
15.1
通讯作者：
Leung, Dennis Y. C.
中科院分区：
文献类型：
--
作者：
Huang, Haibao;Hu, Peng;Leung, Dennis Y. C.
采用NaBH 4还原法制备了一系列不同Pt粒径和化学性质的Pt/TiO 2催化剂。在室温下，它们被用来催化氧化气态甲醛（HCHO）。研究了Pt NPs的结构性质对催化活性的影响。所制备的Pt纳米颗粒是高度分散的，即使在室温下也对HCHO氧化非常活跃。最大Pt分散率和甲醛去除率分别达到73.4%和81.3%。铂纳米粒子的周转频率（TOF）呈现尺寸依赖效应。平均粒径为10.1 nm的Pt纳米颗粒对甲醛的氧化具有最高的飞行时间，为4.39 s（-1）。(C)2014爱思唯尔有限公司版权所有。
A series of Pt/TiO2 catalysts with various Pt particle sizes and chemical properties were facilely synthesized by NaBH4 reduction and heated at different temperatures. They were used to catalytically oxidize gaseous formaldehyde (HCHO) at ambient temperature. The influence of structural nature of Pt NPs on catalytic activity was investigated. The as-prepared Pt NPs are highly dispersed and very active for HCHO oxidation even at room temperature. The maximum Pt dispersion and HCHO removal efficiency reached 73.4% and 81.3%, respectively. The turnover frequencies (TOFs) of Pt NPs present size-dependent effect. The Pt NPs with average size of 10.1 nm had the highest TOF of 4.39 s(-1) for HCHO oxidation. (C) 2014 Elsevier B.V. All rights reserved.