Low-Temperature Ammonia Oxidation in a Microchannel Reactor with Wall-Loaded X(X = Pt, Pd, Rh, PtPdRh)/TiO2 Nanotube Catalysts
Low-Temperature Ammonia Oxidation in a Microchannel Reactor with Wall-Loaded X(X = Pt, Pd, Rh, PtPdRh)/TiO2 Nanotube Catalysts
复制标题
壁负载 X(X = Pt, Pd, Rh, PtPdRh)/TiO2 纳米管催化剂微通道反应器中的低温氨氧化
DOI：
10.1021/acs.iecr.9b01135
复制
发表时间：
2019-06-12
影响因子：
4.2
通讯作者：
Jiang, Wei
中科院分区：
文献类型：
--
作者：
Liu, Qjang;Qiu, Wei;Jiang, Wei
在本研究中，将阳极氧化的TiO2纳米管通过光还原沉积法制备了壁面负载的X(X = Pt, Pd, Rh, PtPdRh)/TiO2纳米管（NT）催化剂，并将其组装在微通道反应器中催化氨氧化。结果表明，Pt/TiO2-NTs在280℃和380℃下的NH3转化率和NOx选择性分别高达100%。模拟结果表明，Pt（111）表面NH3和O2的吸附能介于Rh（111）和Pd（111）之间，但Pt（111）表面的NO解离能最高，因此Pt/TiO2-NTs最容易解吸NO，因此其催化性能最好。
In this research, wall-loaded X(X = Pt, Pd, Rh, PtPdRh)/TiO2 nanotube (NT) catalysts were prepared by deposition via photoreduction with anodized TiO2 nanotubes and were assembled in a microchannel reactor to catalyze ammonia oxidation. Results showed that Pt/TiO2-NTs gave NH3 conversion and NOx selectivity as high as 100% at 280 and 380 °C, respectively. Simulations confirmed that the NO-dissociation energy on Pt(111) is the highest, although the adsorption energy of NH3 and O2 on the Pt(111) surface was between those on Rh(111) and Pd(111), resulting in the easiest NO desorption and, consequently, the best catalytic performance of Pt/TiO2-NTs.