Effect of the electric potential on the interaction of gold nanoparticles deposited on a graphite substrate with molecular hydrogen

Гатин, А. К.; Grishin, M. V.; Kolchenko, N. N.; Sarvadii, S. Yu.; Шуб, Б. Р.

doi:10.1134/s1990793117020051

Cited by 4 publications

(2 citation statements)

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“…This has been experimentally proven recently by an example of the Diels–Alder reaction, which was studied by the scanning tunneling microscopy (STM) break-junction method [ 16 ]. Previously, we found similar effects of the electric fields on the reduction of oxidized platinum by hydrogen [ 17 ], hydrogen adsorption on gold [ 18 , 19 ], decomposition of ammonia on organoboron [ 20 ] and platinum nanoparticles [ 21 ], and some reactions of the hydrogenation of hydrocarbons [ 22 ].…”

Section: Introductionmentioning

confidence: 77%

Effect of CO Molecule Orientation on the Reduction of Cu-Based Nanoparticles

et al. 2021

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The adsorption of CO on the surface of Cu-based nanoparticles was studied in the presence of an external electric field by means of scanning tunneling microscopy (STM) and spectroscopy (STS). Nanoparticles were synthesized on the surface of a graphite support by the impregnation–precipitation method. The chemical composition of the surface of the nanoparticles was determined as a mixture of Cu2O, Cu4O3 and CuO oxides. CO was adsorbed from the gas phase onto the surface of the nanoparticles. During the adsorption process, the potential differences ΔV = +1 or −1 V were applied to the vacuum gap between the sample and the grounded tip. Thus, the system of the STM tip and sample surface formed an asymmetric capacitor, inside which an inhomogeneous electric field existed. The CO adsorption process is accompanied by the partial reduction of nanoparticles. Due to the orientation of the CO molecule in the electric field, the reduction was weak in the case of a positive potential difference, while in the case of a negative potential difference, the reduction rate increased significantly. The ability to control the adsorption process of CO by means of an external electric field was demonstrated. The size of the nanoparticle was shown to be the key factor affecting the adsorption process, and particularly, the strength of the local electric field close to the nanoparticle surface.

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Section: Introductionmentioning

confidence: 77%

Effect of CO Molecule Orientation on the Reduction of Cu-Based Nanoparticles

et al. 2021

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“…In addition to a constant electric field, several studies have reported that some reactions, such as acceleration of CO oxidation over NiO at a certain frequency, can be affected by an alternating electric field. 35 Recent experimental studies have demonstrated the influence of an external constant electric field (or the applied potential, which is equivalent to the electric field) to various types of reactions: the processes of hydrogen reduction of oxidized platinum, 36 hydrogen chemisorption on gold nanoparticle surfaces, 37,38 decomposition of ammonia on organoboron nanoparticles 39 and platinum nanoparticles, 40 and hydrogenation of ethylene on a nanostructured platinum coating. 41 The premise of the presented study was work, 42 which established the influence of an external electric field on the processes of reduction of an oxidized copper nanoparticles surface interacting with carbon monoxide by the methods of scanning tunneling microscopy and spectroscopy.…”

Section: Introductionmentioning

confidence: 99%