Реферат: During the reaction of H2 + 12 O2 → H2O on a platinum field emitter at 300 <T<400 K, pH2 = 5×10-7 to 5 × 10-4 mbar and pO2 = 3 × 10-5 to 6 × 10-4 mbar, three different adsorption phases can be distinguished in-situ via FEM and FIM. In FEM the different local work functions lead to areas of differing brightness, i.e. an Oad-covered surface with high work function appears black and a Had-covered surface with lower work function bright. In FIM, oxygen acts as the imaging gas (O+2 ions) of the Oad-covered surface areas and even brighter images are formed by the product water, thus identifying active sites of the reaction. At steady-state conditions the adsorption of hydrogen appears in the form of islands with 30 to 50 Å diameter black areas. The oscillating H2/O2 reaction follows a Langmuir-Hinshelwood mechanism. The Oad-covered surface starts at the {111} planes ({331} terraces) and proceeds in an anisotropic reaction sequence of planes until finally the (001) plane is covered by hydrogen. This Had layer at the Pt(001) surface is transferred into the Oad layer by a reaction front traveling in the reverse direction, starting from the central Pt(001) and propagating to the peripheral {111} planes.

Библиографическая ссылка: Gorodetskii V. , Block J.H. , Drachsel W.
Isothermal Oscillations of the Hydrogen-Oxidation Reaction on Platinum: Investigations in the Field Electron and Field Ion Microscope
Applied Surface Science. 1994. V.76-77. N1-4. P.129-135. DOI: 10.1016/0169-4332(94)90333-6 WOS Scopus РИНЦ CAPlusCA OpenAlex Sciact

Даты:

Поступила в редакцию:	2 авг. 1993 г.
Принята к публикации:	20 сент. 1993 г.
Опубликована в печати:	2 мар. 1994 г.
Опубликована online:	10 окт. 2002 г.

Идентификаторы БД:

Web of science:	WOS:A1994ND58700023
Scopus:	2-s2.0-0028383205
РИНЦ:	31116230
Chemical Abstracts:	1994:287084
Chemical Abstracts (print):	120:287084
OpenAlex:	W2083444462
Sciact:	12323

Цитирование в БД:

БД	Цитирований
Scopus	44
OpenAlex	39

Альметрики: