Effects of Cl on the reduction of supported PdO in ethanol/water solvent mixtures
Effects of Cl on the reduction of supported PdO in ethanol/water solvent mixtures
复制标题
Cl 对乙醇/水溶剂混合物中负载型 PdO 还原的影响
DOI:
10.1080/2055074x.2016.1267296
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Brazier J
中科院分区:
文献类型:
--
作者:
Brazier J
The reduction of γ-Al2O3-supported PdO in flowing aqueous ethanol was investigated. Quick EXAFS (QEXAFS) performed at the Pd K-edge reveals that the presence of Cl can have a profound effect on the reduction process. At low loadings of Pd (1 wt-%), the size dependency of the process is inverted, compared to Cl-free samples. The extent of reduction was found to be dependent on loading/particles size. It is shown, usingin situQEXAFS at the Cl K- and Pd L3-edges, that residual Cl is not removed by the flowing solvent mixture, even at an elevated temperature of 350 K. The origins of these behaviours are discussed in terms of the differing effects that Cl may have when bonded to oxidic or reduced metal centres and the results were compared to earlier observations made on the effects of Cl on commercial polyurea encapsulated Pd ENCAT™ NP 30 catalysts.
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