Selective Room-Temperature Hydrogenation of Carbonyl Compounds under Atmospheric Pressure over Platinum Nanoparticles Supported on Ceria-Zirconia Mixed Oxide
作者:Elena A. Redina、Kseniia V. Vikanova、Gennady I. Kapustin、Igor V. Mishin、Olga P. Tkachenko、Leonid M. Kustov
DOI:10.1002/ejoc.201900215
日期:2019.7.14
Developed Pt/CeO2‐ZrO2 catalyst demonstrates record low‐temperaturehydrogen spill‐over affording selective hydrogenation of carbonyl compounds to alcohols at roomtemperature and atmosphericpressure.
研发的Pt / CeO 2 -ZrO 2催化剂显示出创纪录的低温氢气溢出效果,可在室温和大气压下将羰基化合物选择性氢化为醇。
Nanocrystalline Oxalate/Carbonate Precursors of Ce and Zr and Their Decompositions to CeO<sub>2</sub>and ZrO<sub>2</sub>Nanoparticles
作者:Sonalika Vaidya、Tokeer Ahmad、Suman Agarwal、Ashok K. Ganguli
DOI:10.1111/j.1551-2916.2007.01484.x
日期:2007.3
The oxalate and carbonate precursors of cerium and zirconium have been prepared using reverse micelles as nanoreactors. Cerium oxalate precursor on thermal decomposition leads to a mixture of nanorods and nanoparticles of cerium oxide (nano-particles of 10 nm and nanorods with 7 nm diameter and 30 nm length). Cerium oxide with crystallite size of 10 nm was obtained from cerium carbonate precursor.
Determination of trace amount of oxalic acid with zirconium(IV)–(DBS-arsenazo) by spectrophotometry
作者:Qing-Zhou Zhai
DOI:10.1016/j.saa.2007.12.026
日期:2008.11
novel method is proposed for the determination of trace amount of oxalic acid in the present article. In 1.0 M hydrochloric acid medium, oxalic acid can react with the zirconium(IV) in Zr(IV)–(DBS-arsenazo) complex and replaces the DBS-arsenazo to produce a hyperchromic effect at 520 nm. The hyperchromic degree is proportional to the concentration of the oxalic acid added over a defined range. Based
本文提出了一种测定痕量草酸的新方法。在1.0 M盐酸介质中,草酸可与Zr(IV)–(DBS-砷偶氮)络合物中的锆(IV)反应,并取代DBS-砷偶氮在520 nm处产生增色作用。高色度与在规定范围内添加的草酸浓度成正比。基于此性质,开发了一种分光光度法测定痕量草酸的新方法。 草酸的比尔定律在9.0×10 -6至5.0×10 -4 M的浓度范围内保持,相关系数为0.9995。该方法的表观摩尔吸收率为ɛ520 nm = 1.16×10 3 L mol-1 cm -1,草酸的检出限为0.815μg/ mL。该方法直接用于番茄样品中草酸的测定,结果令人满意。