Hydrogen Adsorption Properties of Carbon Nanotubes and Platinum Nanoparticles from a New Ammonium‐Ethylimidazolium Chloroplatinate Salt

Abstract

Self-supporting membranes built entirely of carbon nanotubes have been prepared by wet methods and characterized by Raman spectroscopy. The membranes are used as supports for the electrodeposition of Pt nanoparticles without the use of additional additives and/or stabilizers. The Pt precursor is an ad hoc synthesized ammonium-ethylimidazolium chloroplatinate(IV) salt, [NH3 (CH2 )2 MIM)][PtCl6 ]. The Pt complex was characterized using NMR spectroscopy, XRD, ESI-MS, and FTIR spectroscopy. The interaction between the Pt-carbon nanotubes nanocomposites and hydrogen is analyzed using electrochemical and quartz microbalance measurements under near-ambient conditions. The contribution of the Pt phase to the hydrogen adsorption on nanotube is found and explained by a kinetic model that takes into account a spillover event. Such a phenomenon may be exploited conveniently for catalysis and electrocatalysis applications in which the hybrid systems could act as a hydrogen transfer agent in specific hydrogenation reactions.

Determination of the Electrochemical Area of Screen-Printed Electrochemical Sensing Platforms

“…Additionally, alternative electrochemically irreversible probes such as NAD + and ascorbic acid have been used to measure the surface area of commercial SPEs using CV [ 19 ]. Moreover, Terranova et al have utilised dilute H 2 SO 4 for determining the area of a MWCNT-PtNP modified electrode using a both CV and CC methods [ 20 ].…”

Advances in Strain‐Induced Noble Metal Nanohybrids for Electro‐Catalysis: From Theoretical Mechanisms to Practical Use

“…The preparation of noble metal surface layers can be controlled by electronic means, such as through electro‐deposition methods, adjusting the potential/current density and time, [42] as well as selecting platinum precursor salts and adjusting the electrolyte, [23c] to achieve control over the number of noble metal shell layers. Crooks and his colleagues have developed an electrochemical approach known as hydride‐terminated electrodeposition, which allows for the deposition of a single Pt monolayer on bulk‐phase Au surfaces (Figure 2a).…”

“…Orlanducci and colleagues fabricated self‐supporting membranes constructed solely from carbon nanotubes using wet methods. These membranes serve as substrates for the electrodeposition of Pt NPs, eliminating the need for supplementary additives and/or stabilizers [23c] . Recent work by our group has demonstrated that synthesizing micron‐sized Pt‐WC/CNT catalysts via a self‐assembly route, which are both superhydrophilic and feature a coronavirus‐like structure, leads to outstanding intrinsic activity and efficient bubble transfer properties (Figure 10b–d).…”