Platinum Catalyst Experiment
Platinum Catalyst Experiment - Related Videos
10:38
Electrochemical Measurements of Supported Catalysts Using a Potentiostat/Galvanostat
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2023
Source: Laboratory of Dr. Yuriy Román — Massachusetts Institute of Technology A potentiostat/galvanostat (often referred to as simply a potentiostat) is an instrument that measures current at an applied potential (potentiostatic operation) or measures potential at an applied current (galvanostatic operation) (Figure 1). It is the most commonly used instrument in the electrochemical characterization of anode and cathode materials for fuel cells, electrolyzers, batteries, and supercapacitors.
10:19
Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
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2017
A convenient method for the synthesis of 2 nm supported bimetallic nanoparticle Pt-Cu catalysts for propane dehydrogenation is reported here. In situ synchrotron X-ray techniques allow for the determination of the catalyst structure, which is typically unobtainable using laboratory instruments.
11:15
HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin
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Cited by 12 •
2016
The conversion of trans-ferulic acid to vanillin was achieved by heterogeneous catalysis. HKUST-1 was employed in this synthesis and the essential step in the catalytic process was the generation of unsaturated metal sites. Thus, when the catalyst was activated under vacuum, full vanillin conversion (yield of 95%) was obtained.
09:53
Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture
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Cited by 3 •
2018
Here we present a protocol to measure the modulus of rupture of an extruded catalyst and the breakage of said catalyst extrudates by collision against a surface or by compression in a fixed bed.
08:15
Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts
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Cited by 1 •
2017
Presented here is a protocol for the operation of a micro-scale temperature-programmed reactor for evaluating the catalytic performance of molybdenum carbide during acetic acid deoxygenation.
FAQs
At the platinum surface, reactant molecules adsorb, meaning they attach temporarily to the solid. This contact can weaken bonds within the reactants and organize them for reaction. The surface therefore enables an alternative pathway with lower activation energy than the corresponding uncatalyzed route, helping explain why measurable reaction rates can increase in the experiment.
Activation energy represents the energy barrier that reactants must overcome to form products. Platinum provides a reaction pathway with a lower barrier, so the comparison with an uncatalyzed process reveals how the catalyst affects reaction speed. This interpretation connects an observable rate change with molecular-scale events occurring at the catalyst surface.
The key distinction is the presence of surface-mediated interactions. With platinum, reactants adsorb at an active surface, their bonds can weaken, and a lower-energy pathway becomes available. Without the catalyst, that surface assistance is absent. Comparing the two processes allows students to relate different reaction speeds to changes in the molecular reaction pathway.
The experiment compares a reaction performed with platinum against a corresponding uncatalyzed process. Observable changes in reaction speed provide the central comparison, while product formation offers an additional outcome to examine. This paired approach helps separate the effect of the platinum surface from the underlying reaction behavior and demonstrates catalysis through evidence rather than description alone.
Students can connect changes in reaction speed and product formation with the operation of a catalyst. The results provide an experimental link between microscopic surface chemistry, including adsorption and bond weakening, and macroscopic chemical behavior. This makes the activity useful for understanding how molecular events produce measurable outcomes in a laboratory setting.
The same catalytic principles support several important technologies and chemical processes. Platinum is used in industrial catalysis and chemical synthesis, where its active surface can promote reactions, and in emissions control. It also has a role in electrochemical devices such as fuel cells, extending the experiment’s relevance from classroom chemistry to materials science and applied research.