And (e) Pt25SA4W. The graphic of theof the H2 consumption the TPR (up to 500 ) of C) (d) Pt25SAW, and (e) Pt25SAW. The graphic H2 consumption from in the TPR (as much as 500 theof the catalysts is inserted in the upper inset. catalysts is inserted in the upper inset.In In the Pt/Al2catalyst (Pt100A), 3 reduction peaks had been detected with maxithe Pt/Al2O3 O3 catalyst (Pt100A), 3 reduction peaks were detected with maximums at 270, and 430 430 C (Figure 11). These peaks have been were observed by other mums at 115,115, 270, and (Figure 11). These exact same identical peaks observed by other auauthors they they employed (Ketjen) inside the preparation of their Pt catalysts [50]. The initial thors whenwhen made use of Al2O3Al2 O3 (Ketjen) inside the preparation of their Pt catalysts [50]. The H2 initially H2 peak corresponded towards the reduction of massof mass PtO2 weakly towards the suppeak at 115 at 115 C corresponded towards the reduction PtO2 weakly bound bound to the help [51,52]. port [51,52]. The second reduction peak having a maximum 245 C has been attributed the The second reduction peak using a maximum at at 245 has been attributed to for the reduction a a platinum oxychlorinated compound the form [Pt(OH)xCly]s when the reduction of ofplatinum oxychlorinated compound of with the kind [Pt(OH)xCly]s when the catalyst has been calcined at 300 C [50,51] a different Pt oxychloro-complex in the type catalyst has been calcined at 300 [50,51] or or a further Pt oxychloro-complex with the type [PtOxCly]s that seems at 290 offered the sample is is calcined at 600 C [53]. [PtOxCly]s that appears at 290 , C, provided the sample calcined at 600 [53]. Other authors, which include Yao et [51], proposed the existence of of two probable oxidized Other authors, for instance Yao et al. al. [51], proposed the existence two achievable oxidized states of Pt:particulate phase of of PtO2 reducible a low temperature in addition to a dispersed states of Pt: a a particulate phase PtO2 reducible at at a low temperature as well as a dispersed phase of Pt oxide firmly bound towards the help that is certainly lowered at a temperature close towards the reduction with the previously mentioned Pt oxychloro-complex. As outlined by these authors, the smaller sized the concentration of platinum oxides, the stronger the interaction of dispersed Pt oxide with Al2O3.Catalysts 2021, 11,14 ofphase of Pt oxide firmly bound for the support that is decreased at a temperature close for the reduction in the previously pointed out Pt oxychloro-complex. In accordance with these authors, the smaller sized the concentration of platinum oxides, the stronger the interaction of dispersed Pt oxide with Al2 O3 . Other authors mention the existence of a reduction complicated of the Pt l2 O3 -x sort or the formation in the Pt3 Al alloy recommended by Dautzemberg et al. [54]. On the other hand, resulting from our chlorine analysis research, the proposal by Lieske et al. [53] is extra acceptable. The third peak appeared at 430 C, corresponing to a Pt Ganetespib supplier species strongly bound towards the help. This peak has been reported in other research [50] and might be related to the formation of an additional complex from the PtOxClz form; on the other hand, a well-defined peak was not located at this temperature in Al2 O3 . When H2 PtCl6 is impregnated on SiO2 , 3 peaks are located resulting from the chlorinated Pt compounds, with the highest at 452 C [55]. The reduction reactions could be: PtO2 + 2 H2 Pt + 2H2 O (1) Avibactam sodium Protocol PtOxCly + (x + y/2)H2 Pt + xH2 O + yHCl (2) It must be noted that Pt compounds containing Cl- are extra tough to minimize than Pt compounds containing O.