Abstract: Metal clusters with sizes below 1 nm attract great scientific interest, but the main information on their properties still comes from quantum mechanics modeling and costly physical methods of limited availability. We have studied ultradispersed Pt/γ-Al2O3 samples with temperature-programmed desorption (TPD) and complementary adsorption/desorption techniques and observed that the H2-TPD profile of Pt/γ-Al2O3 is strongly dependent on the pretreatment conditions (0 < PH2 ≤ 1 bar; 200 K ≤ T ≤ 470 K). The results corroborate recent theoretical and spectroscopic studies predicting alterations in the structure of Pt nanoclusters under H2-treatment conditions but reveal that the restructuring needs to overcome continuous activation barriers and leads both to an increase in surface coverage and strengthening of the Pt-H bonds. This was interpreted as being a consequence of the strong interaction of Pt clusters with the support. The results extend insights into the behavior of supported metal particles and expand the potential of existing experimental techniques

Cite: Yakovina O.A. , Lisitsyn A.S.
Probing the H2‑Induced Restructuring of Pt Nanoclusters by H2‑TPD
Langmuir. 2016. V.32. N46. P.12013-12021. DOI: 10.1021/acs.langmuir.6b02847 WOS Scopus РИНЦ ANCAN PMID OpenAlex

Dates:

Submitted:	Jul 31, 2016
Accepted:	Oct 6, 2016
Published online:	Nov 8, 2016
Published print:	Nov 22, 2016

Identifiers:

Web of science:	WOS:000388914400003
Scopus:	2-s2.0-84997830839
Elibrary:	27586774
Chemical Abstracts:	2016:1743457
Chemical Abstracts (print):	165:565512
PMID:	27779882
OpenAlex:	W2537128857

Citing:

DB	Citing
Web of science	21
Scopus	23
Elibrary	21
OpenAlex	23

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