Premium
Self‐Supporting AuCu@Cu Elongated Pentagonal Bipyramids Toward Neutral Glucose Sensing
Author(s) -
Wang Gang,
Jin Zhitong,
Zhang Meirong,
Wang ZhongSheng
Publication year - 2016
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201600077
Subject(s) - catalysis , copper , alloy , materials science , crystallography , chemical engineering , metal , chemistry , metallurgy , organic chemistry , engineering
Controlling the electronic structure of a catalyst has become an important approach to tune and optimize its antipoisoning ability and catalytic efficiency for a chemical reaction. Using d ‐mannitol as a structure‐directing agent to induce size transformation and twinned defects in copper particles, penta‐twinned Cu elongated pentagonal bipyramids as supports have been synthesized, and HAuCl 4 is reduced in situ to form an AuCu alloy on the surface of Cu, generating a self‐supporting AuCu@Cu core–shell structure for application as a glucose sensor in a neutral medium. The AuCu@Cu elongated pentagonal bipyramids with 0.42 at% Au show activities comparable with the Au and Pt catalyst but are more tolerant toward Cl − than Au and more tolerant toward H 3– x PO 4 x − than Cu. The mass activity of AuCu@Cu reaches 0.10 A mg −1 of Au at 0.6 V versus Ag/AgCl (3 m KCl) in a pH 8.0 buffer. The self‐supporting AuCu@Cu elongated pentagonal bipyramids are promising catalysts for glucose sensing in a neutral medium. This work offers an effective way to design antitoxic and durable catalysts with ultralow content of noble metal for glucose sensing.