Kinetics of the reaction of H2with Pt-nanoparticles in aqueous suspensions monitored by the catalytic reduction of PW12O403-

Aswin Kottapurath Vijay; Dan Meyerstein; Vered Marks; Yael Albo

doi:10.1039/d0qi01255f

Kinetics of the reaction of H₂with Pt-nanoparticles in aqueous suspensions monitored by the catalytic reduction of PW₁₂O₄₀^3-

Aswin Kottapurath Vijay, Dan Meyerstein, Vered Marks, Yael Albo

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The reaction between Pt and H2 is very fast and essential in many catalytic processes, but until now, the rate constants of this reaction were measured only electrochemically. Herein we report the first kinetic measurements of H2 + Pt nanoparticles, Pt-NPs, in the absence of an electric field. The reaction of H2 with two different sized Pt-nanoparticles (2.0 and 4.0 nm) stabilized by a monolayer of PW12O403- was studied by following the rate of formation of PW12O404-/5-. The observed reaction rate depends linearly on [Pt-NPs] and on [H2] but is independent on [PW12O403-]. The results indicate that the rate-determining step is either Pt-NP-H2 ? Pt-NP-2H or Pt-NP-H2 ? (Pt-NP-H)- + H3O+. The rate constants of the latter two reactions decrease with the increase of hydrogen coverage of the Pt-NPs.

Original language	English
Pages (from-to)	989-995
Number of pages	7
Journal	Inorganic Chemistry Frontiers
Volume	8
Issue number	4
DOIs	https://doi.org/10.1039/d0qi01255f
State	Published - 21 Feb 2021

ASJC Scopus subject areas

Inorganic Chemistry

Access to Document

10.1039/d0qi01255f

Cite this

@article{4d29324ee9fd43d88fe78228e6576028,

title = "Kinetics of the reaction of H2with Pt-nanoparticles in aqueous suspensions monitored by the catalytic reduction of PW12O403-",

abstract = "The reaction between Pt and H2 is very fast and essential in many catalytic processes, but until now, the rate constants of this reaction were measured only electrochemically. Herein we report the first kinetic measurements of H2 + Pt nanoparticles, Pt-NPs, in the absence of an electric field. The reaction of H2 with two different sized Pt-nanoparticles (2.0 and 4.0 nm) stabilized by a monolayer of PW12O403- was studied by following the rate of formation of PW12O404-/5-. The observed reaction rate depends linearly on [Pt-NPs] and on [H2] but is independent on [PW12O403-]. The results indicate that the rate-determining step is either Pt-NP-H2 ? Pt-NP-2H or Pt-NP-H2 ? (Pt-NP-H)- + H3O+. The rate constants of the latter two reactions decrease with the increase of hydrogen coverage of the Pt-NPs.",

author = "Vijay, {Aswin Kottapurath} and Dan Meyerstein and Vered Marks and Yael Albo",

note = "Publisher Copyright: {\textcopyright} the Partner Organisations.",

year = "2021",

month = feb,

day = "21",

doi = "10.1039/d0qi01255f",

language = "English",

volume = "8",

pages = "989--995",

journal = "Inorganic Chemistry Frontiers",

issn = "2052-1545",

publisher = "Royal Society of Chemistry",

number = "4",

}

TY - JOUR

T1 - Kinetics of the reaction of H2with Pt-nanoparticles in aqueous suspensions monitored by the catalytic reduction of PW12O403-

AU - Vijay, Aswin Kottapurath

AU - Meyerstein, Dan

AU - Marks, Vered

AU - Albo, Yael

PY - 2021/2/21

Y1 - 2021/2/21

N2 - The reaction between Pt and H2 is very fast and essential in many catalytic processes, but until now, the rate constants of this reaction were measured only electrochemically. Herein we report the first kinetic measurements of H2 + Pt nanoparticles, Pt-NPs, in the absence of an electric field. The reaction of H2 with two different sized Pt-nanoparticles (2.0 and 4.0 nm) stabilized by a monolayer of PW12O403- was studied by following the rate of formation of PW12O404-/5-. The observed reaction rate depends linearly on [Pt-NPs] and on [H2] but is independent on [PW12O403-]. The results indicate that the rate-determining step is either Pt-NP-H2 ? Pt-NP-2H or Pt-NP-H2 ? (Pt-NP-H)- + H3O+. The rate constants of the latter two reactions decrease with the increase of hydrogen coverage of the Pt-NPs.

AB - The reaction between Pt and H2 is very fast and essential in many catalytic processes, but until now, the rate constants of this reaction were measured only electrochemically. Herein we report the first kinetic measurements of H2 + Pt nanoparticles, Pt-NPs, in the absence of an electric field. The reaction of H2 with two different sized Pt-nanoparticles (2.0 and 4.0 nm) stabilized by a monolayer of PW12O403- was studied by following the rate of formation of PW12O404-/5-. The observed reaction rate depends linearly on [Pt-NPs] and on [H2] but is independent on [PW12O403-]. The results indicate that the rate-determining step is either Pt-NP-H2 ? Pt-NP-2H or Pt-NP-H2 ? (Pt-NP-H)- + H3O+. The rate constants of the latter two reactions decrease with the increase of hydrogen coverage of the Pt-NPs.

UR - http://www.scopus.com/inward/record.url?scp=85101410191&partnerID=8YFLogxK

U2 - 10.1039/d0qi01255f

DO - 10.1039/d0qi01255f

M3 - Article

AN - SCOPUS:85101410191

SN - 2052-1545

VL - 8

SP - 989

EP - 995

JO - Inorganic Chemistry Frontiers

JF - Inorganic Chemistry Frontiers

IS - 4

ER -

Kinetics of the reaction of H₂with Pt-nanoparticles in aqueous suspensions monitored by the catalytic reduction of PW₁₂O₄₀^3-

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this