In:
Angewandte Chemie, Wiley, Vol. 128, No. 29 ( 2016-07-11), p. 8556-8560
Abstract:
The uptake of precious metals from electronic waste is of environmental significance and potential commercial value. A facile bioreductive synthesis is described for Au nanoparticles (ca. 20 nm) supported on N‐doped carbon (Au@NC), which was derived from Au/ Pycnoporus sanguineus cells. The interface and charge transport between Au and N‐doped carbon were confirmed by HRTEM and XPS. Au@NC was employed as an electrocatalyst for the hydrogen evolution reaction (HER), exhibiting a small onset potential of −54.1 mV (vs. RHE), a Tafel slope of 76.8 mV dec −1 , as well as robust stability in acidic medium. Au@NC is a multifunctional electrocatalyst, which demonstrates high catalytic activity in the oxygen reduction reaction (ORR), as evidenced by an onset potential of +0.97 V, excellent tolerance toward methanol, and long‐term stability. This work exemplifies dual recovery of precious Au and fabrication of multifunctional electrocatalysts in an environmentally benign and application‐oriented manner.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v128.29
DOI:
10.1002/ange.201602627
Language:
English
Publisher:
Wiley
Publication Date:
2016
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