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Polyvinylpyrrolidone (PVP)-Capped Pt Nanocubes with Superior Peroxidase-Like Activity

Journal Article · · ChemNanoMat
 [1];  [2];  [1];  [1];  [1]
  1. Department of Chemistry, Michigan Technological University, Houghton Michigan 49931 United States
  2. Center for Nanoscale Materials, Argonne National Laboratory, Argonne Illinois 60439 United States
Peroxidase mimics of inorganic nanoparticles are expected to circumvent the inherent issues of natural peroxidases, providing enhanced performance in important applications such as diagnosis and imaging. Despite the report of a variety of peroxidase mimics in the past decade, very limited progress has been made on improving their catalytic efficiency. The catalytic efficiencies of most previously reported mimics are only up to one order of magnitude higher than those of natural peroxidases. In this work, we demonstrate a type of highly efficient peroxidase mimic – polyvinylpyrrolidone (PVP)-capped Pt nanocubes of sub-10 nm in size. These PVP-capped Pt cubes are ~200-fold more active than the natural counterparts and exhibit a record-high specific catalytic efficiency. In addition to the superior efficiency, the new mimic shows several other promising features, including excellent stabilities, well-controlled uniformity in both size and shape, controllable sizes, and facile and scalable production.
Research Organization:
Argonne National Laboratory (ANL)
Sponsoring Organization:
USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1389648
Journal Information:
ChemNanoMat, Journal Name: ChemNanoMat Journal Issue: 1 Vol. 3; ISSN 2199-692X
Publisher:
Wiley
Country of Publication:
United States
Language:
English

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