Research output: Contribution to journal › Article › peer-review
Pd on Nanodiamond/Graphene in Hydrogenation of Propyne with Parahydrogen. / Burueva, Dudari B.; Sviyazov, Sergey V.; Huang, Fei et al.
In: Journal of Physical Chemistry C, Vol. 125, No. 49, 16.12.2021, p. 27221-27229.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Pd on Nanodiamond/Graphene in Hydrogenation of Propyne with Parahydrogen
AU - Burueva, Dudari B.
AU - Sviyazov, Sergey V.
AU - Huang, Fei
AU - Prosvirin, Igor P.
AU - Bukhtiyarov, Andrey V.
AU - Bukhtiyarov, Valerii I.
AU - Liu, Hongyang
AU - Koptyug, Igor V.
N1 - Publisher Copyright: © 2021 American Chemical Society
PY - 2021/12/16
Y1 - 2021/12/16
N2 - The catalytic behavior of Pd catalysts supported on a defective nanodiamond/graphene material (ND@G) was studied in propyne hydrogenation with parahydrogen, taking advantage of the possibility to control the character of metal distribution by changing metal loading. Two different catalysts were studied in this work: Pd1/ND@G with a monoatomic Pd distribution (0.11 wt %) and Pdn/ND@G comprising supported metal clusters (0.87 wt %). The monoatomic distribution of Pd in Pd1/ND@G was confirmed by XPS and HAADF-STEM methods. This catalyst demonstrated an outstanding selectivity to propene (up to 100%) in propyne hydrogenation. The activity of the two Pd catalysts in pairwise H2 addition to propyne was compared under the same experimental conditions by observing 1H NMR signal enhancements provided by the parahydrogen-induced polarization (PHIP) effect. The enhancements produced by the Pd1/ND@G catalyst were found to be ca. 6-fold larger than those observed with Pdn/ND@G, indicating that the character of metal distribution has important consequences for the performance of a catalyst and its efficiency in terms of PHIP effects.
AB - The catalytic behavior of Pd catalysts supported on a defective nanodiamond/graphene material (ND@G) was studied in propyne hydrogenation with parahydrogen, taking advantage of the possibility to control the character of metal distribution by changing metal loading. Two different catalysts were studied in this work: Pd1/ND@G with a monoatomic Pd distribution (0.11 wt %) and Pdn/ND@G comprising supported metal clusters (0.87 wt %). The monoatomic distribution of Pd in Pd1/ND@G was confirmed by XPS and HAADF-STEM methods. This catalyst demonstrated an outstanding selectivity to propene (up to 100%) in propyne hydrogenation. The activity of the two Pd catalysts in pairwise H2 addition to propyne was compared under the same experimental conditions by observing 1H NMR signal enhancements provided by the parahydrogen-induced polarization (PHIP) effect. The enhancements produced by the Pd1/ND@G catalyst were found to be ca. 6-fold larger than those observed with Pdn/ND@G, indicating that the character of metal distribution has important consequences for the performance of a catalyst and its efficiency in terms of PHIP effects.
UR - http://www.scopus.com/inward/record.url?scp=85120869743&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.1c08424
DO - 10.1021/acs.jpcc.1c08424
M3 - Article
AN - SCOPUS:85120869743
VL - 125
SP - 27221
EP - 27229
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 49
ER -
ID: 34951311