The thermal decomposition of platinum(II) and (IV) complexes

Understanding the Influence of the Pretreatment Procedure on Platinum Particle Size and Particle-Size Distribution for SiO2 Impregnated with [Pt2+(NH3)4](NO3−)2: A Combination of HRTEM, Mass Spectrometry, and Quick EXAFS

“…10) (20). As expected during calcination, no metallic Pt-Pt contribution is present for the whole temperature range.…”

“…Several studies that give some insight into the chemical processes taking place during the pretreatment processes have been performed (18,20). Kinoshita et al (20) 4 on a HZSM-5 system using energydispersive extended X-ray absorption fine structure (EXAFS).…”

Highly loaded carbon black supported Pt catalysts for fuel cells

“…The same was observed during calcination of these samples in Ar at about 220 • C. The decomposition of Pt(NH 3 ) 4 (NO 3 ) 2 and Pt(NH 3 ) 2 (NO 2 ) 2 in their unsupported forms or supported on SiO 2 was studied in the literature [21][22][23][24][25]. The unsupported Pt(NH 3 ) 2 (NO 2 ) 2 decomposed to Pt at about 120-130 • C in H 2 flow while at about 210-230 • C in He or air flow.…”

“…The unsupported Pt(NH 3 ) 2 (NO 2 ) 2 decomposed to Pt at about 120-130 • C in H 2 flow while at about 210-230 • C in He or air flow. All these examples were always accompanied with high exothermic effects [21][22][23]. Pt(NH 3 ) 4 (NO 3 ) 2 supported on SiO 2 was reported to decompose to Pt between 150 and 200 • C in H 2 flow while between 200 and 250 • C in Ar or He flow [24,25].…”

Oxygen Reduction Reaction on Pt and Pt Bimetallic Surfaces: A Selective Review

“…In the next two sections we focus on the inhibitive effects of trace levels of Cl ad and Cu 2+ on the kinetics of the ORR. Considering that high-surface area catalysts are often synthesized from halide-containing educts [7][8][9][10][11][12] and that trace levels of chloride may also be present in the water contained in the feed-stream, the effect of Cl ± is of particular practical importance. Trace levels of copper may also be present in the real system, mostly as a corrosion product, thus the effects of underpotentially deposited copper (Cu upd ) on Pt(hkl) will serve as a model system to understand why a small amount of copper has a devastatingly inhibiting effect on the ORR.…”