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- Title
Bioreduction of Precious Metals by Microorganism: Efficient Gold@N-Doped Carbon Electrocatalysts for the Hydrogen Evolution Reaction.
- Authors
Zhou, Weijia; Xiong, Tanli; Shi, Chaohong; Zhou, Jian; Zhou, Kai; Zhu, Nengwu; Li, Ligui; Tang, Zhenghua; Chen, Shaowei
- 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 mVdec-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.
- Subjects
PRECIOUS metals; MICROORGANISMS; ELECTROCATALYSTS; HYDROGEN evolution reactions; METHANOL
- Publication
Angewandte Chemie, 2016, Vol 128, Issue 29, p8556
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/anie.201602627