程序升温技术 (TPAT)是在程序控制温度T下，测量气体的脱附，物质的还原、氧化、硫化和表面反应的技术，可以获得的信息有：表面吸附中心的类型、密度和能量分布；反应分子的动力学行为和反应机理；活性组分和载体、活性组分之间、活性组分和助催化剂、助催化剂和载体之间相互作用；各种催化效应，如溢流效应、协同效应、助催化效应等；催化剂失活和再生等。 具体分类 …

2018年5月15日 · Temperature programmed reduction (TPR) is an analytical technique that examines the surface chemistry of metal oxides under varying thermal conditions, an important factor in catalysis studies.

2022年11月10日 · Hydrogen temperature-programmed reduction (H 2-TPR) technique is significant for catalyst characterization. The available instruments typically measure the H 2 consumption using a thermal conductivity detector (TCD), which is strongly affected by the produced H 2 O molecules.

H2-TPR：就是可以检测出 分子筛催化剂 中负载金属的 物种的分布和含量。 什么是物种？ 比如负载的金属是Cu，那么Cu各种价态、形式的离子都是他的物种。 什么是H2-TPR？ TPR是 程序升温还原。 指在程序升温（按照特定程序进行升温操作）过程中，使催化剂被H2还原的过程，从流出气体中测量还原气体浓度而判断其还原效果。 其他TPR技术还有 程序升温氧化 （TPO）、 程 …

TPR(Temperature Programmed Reduction)：惰性气体吹扫后，先吸附一种还原性气体（H2、CO等），然后再通入一定流量的惰性气体吹扫，并且升高温度，测量吹扫出来的气体的成分与浓度。

2018年5月1日 · In a typical TPR experiment, a metal oxide such as nickel (NiO) is dispersed upon a surface and tested in a system known as a fixed bed reactor. A reducing gaseous mixture such as hydrogen (H 2) is then made to flow across the …

2022年11月29日 · Hydrogen temperature-programmed reduction (H 2 -TPR) technique is significant for catalyst characterization. The available instruments typically measure the H 2 consumption using a thermal conductivity detector (TCD), which is strongly affected by the produced H 2 O molecules.

2024年3月8日 · Here, we analyze H 2 -TPR over Cu-CHA by density functional theory calculations, microkinetic modeling, and TPR measurements of samples pretreated to have a dominant Cu species. We find that H 2 can react with Cu ions in oxidation state +2, whereas adsorption on Cu ions in +1 is endothermic.

2020年12月5日 · TPR-H 2 profile curve at the low heating rate (3 °·min −1) represents one asymmetric peak of hydrogen uptake with a small shoulder in a region of higher temperatures. At higher heating rates (6, 9 and 12 °C·min −1), the shapes of CuO–NiO TPR-H 2 curve profiles become more complex.

2024年10月8日 · H2 temperature-programmed reduction (H2-TPR) is commonly used to probe oxide reducibility by measuring the rate of H2 consumption during temperature ramps, assuming that this rate is controlled by oxide reduction.