Formation of self-inhibiting copper(ii) nanoparticles in an autocatalytic Fenton-like reaction

K.R. Naqvi; J. Marsh; V. Chechik

doi:10.1039/c3dt53617c

Formation of self-inhibiting copper(ii) nanoparticles in an autocatalytic Fenton-like reaction

K.R. Naqvi, J. Marsh, V. Chechik

Chemistry

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

Abstract

Cu(ii)-catalysed decomposition of hydrogen peroxide at alkaline pH in the presence of etidronic acid (HEDP) showed a sigmoid kinetic profile typical of autocatalytic reactions. However, the reaction abruptly stopped well before all hydrogen peroxide had decomposed, and further addition of Cu(ii) and HEDP did not restart the reaction. Results of a mechanistic study suggest that the reaction involves the formation of an active catalyst which decomposes hydrogen peroxide and oxidizes HEDP. Once all HEDP has been consumed, the active complex triggers Cu(ii) aggregation to form remarkably stable but catalytically inactive nanoparticles. The nanoparticles were found to be basic Cu(ii) phosphate/carbonate. They exhibit self-poisoning behaviour in the hydrogen peroxide decomposition and undergo seed-mediated growth upon addition of further Cu(ii).

Original language	English
Pages (from-to)	4745-4751
Number of pages	7
Journal	Dalton Transactions
Volume	43
Issue number	12
Early online date	20 Jan 2014
DOIs	https://doi.org/10.1039/c3dt53617c
Publication status	Published - 28 Mar 2014

Access to Document

10.1039/c3dt53617c

Cite this

@article{b88f494b782a49239419770397444883,

title = "Formation of self-inhibiting copper(ii) nanoparticles in an autocatalytic Fenton-like reaction",

abstract = "Cu(ii)-catalysed decomposition of hydrogen peroxide at alkaline pH in the presence of etidronic acid (HEDP) showed a sigmoid kinetic profile typical of autocatalytic reactions. However, the reaction abruptly stopped well before all hydrogen peroxide had decomposed, and further addition of Cu(ii) and HEDP did not restart the reaction. Results of a mechanistic study suggest that the reaction involves the formation of an active catalyst which decomposes hydrogen peroxide and oxidizes HEDP. Once all HEDP has been consumed, the active complex triggers Cu(ii) aggregation to form remarkably stable but catalytically inactive nanoparticles. The nanoparticles were found to be basic Cu(ii) phosphate/carbonate. They exhibit self-poisoning behaviour in the hydrogen peroxide decomposition and undergo seed-mediated growth upon addition of further Cu(ii).",

author = "K.R. Naqvi and J. Marsh and V. Chechik",

year = "2014",

month = mar,

day = "28",

doi = "10.1039/c3dt53617c",

language = "English",

volume = "43",

pages = "4745--4751",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "The Royal Society of Chemistry",

number = "12",

}

TY - JOUR

T1 - Formation of self-inhibiting copper(ii) nanoparticles in an autocatalytic Fenton-like reaction

AU - Naqvi, K.R.

AU - Marsh, J.

AU - Chechik, V.

PY - 2014/3/28

Y1 - 2014/3/28

N2 - Cu(ii)-catalysed decomposition of hydrogen peroxide at alkaline pH in the presence of etidronic acid (HEDP) showed a sigmoid kinetic profile typical of autocatalytic reactions. However, the reaction abruptly stopped well before all hydrogen peroxide had decomposed, and further addition of Cu(ii) and HEDP did not restart the reaction. Results of a mechanistic study suggest that the reaction involves the formation of an active catalyst which decomposes hydrogen peroxide and oxidizes HEDP. Once all HEDP has been consumed, the active complex triggers Cu(ii) aggregation to form remarkably stable but catalytically inactive nanoparticles. The nanoparticles were found to be basic Cu(ii) phosphate/carbonate. They exhibit self-poisoning behaviour in the hydrogen peroxide decomposition and undergo seed-mediated growth upon addition of further Cu(ii).

AB - Cu(ii)-catalysed decomposition of hydrogen peroxide at alkaline pH in the presence of etidronic acid (HEDP) showed a sigmoid kinetic profile typical of autocatalytic reactions. However, the reaction abruptly stopped well before all hydrogen peroxide had decomposed, and further addition of Cu(ii) and HEDP did not restart the reaction. Results of a mechanistic study suggest that the reaction involves the formation of an active catalyst which decomposes hydrogen peroxide and oxidizes HEDP. Once all HEDP has been consumed, the active complex triggers Cu(ii) aggregation to form remarkably stable but catalytically inactive nanoparticles. The nanoparticles were found to be basic Cu(ii) phosphate/carbonate. They exhibit self-poisoning behaviour in the hydrogen peroxide decomposition and undergo seed-mediated growth upon addition of further Cu(ii).

UR - http://www.scopus.com/inward/record.url?scp=84894810199&partnerID=8YFLogxK

U2 - 10.1039/c3dt53617c

DO - 10.1039/c3dt53617c

M3 - Article

AN - SCOPUS:84894810199

SN - 1477-9226

VL - 43

SP - 4745

EP - 4751

JO - Dalton Transactions

JF - Dalton Transactions

IS - 12

ER -

Formation of self-inhibiting copper(ii) nanoparticles in an autocatalytic Fenton-like reaction

Abstract

Access to Document

Other files and links

Cite this