title: Bioreduction of Precious Metals by Microorganism: Efficient Gold@N-Doped Carbon Electrocatalysts for the Hydrogen Evolution Reaction.
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.
authors.affiliation: School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong, 510006, China. eszhouwj@scut.edu.cn.|Guangdong Provincial Key Lab of Atmospheric Environment and Pollution Control, Environmental Protection Key Lab of Solid Waste Treatment and Recycling, Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, China. eszhouwj@scut.edu.cn.
authors.forename: Weijia
authors.initials: W
authors.lastname: Zhou
authors.affiliation: School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong, 510006, China.
authors.forename: Tanli
authors.initials: T
authors.lastname: Xiong
authors.affiliation: School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong, 510006, China.
authors.forename: Chaohong
authors.initials: C
authors.lastname: Shi
authors.affiliation: National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing, Jiangsu, 210093, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhou
authors.affiliation: School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong, 510006, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Zhou
authors.affiliation: School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong, 510006, China. nwzhu@scut.edu.cn.|Guangdong Provincial Key Lab of Atmospheric Environment and Pollution Control, Environmental Protection Key Lab of Solid Waste Treatment and Recycling, Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, China. nwzhu@scut.edu.cn.
authors.forename: Nengwu
authors.initials: N
authors.lastname: Zhu
authors.affiliation: School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong, 510006, China.
authors.forename: Ligui
authors.initials: L
authors.lastname: Li
authors.affiliation: School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong, 510006, China.
authors.forename: Zhenghua
authors.initials: Z
authors.lastname: Tang
authors.affiliation: School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong, 510006, China.|Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, CA, 95064, USA.
authors.forename: Shaowei
authors.initials: S
authors.lastname: Chen
mesh_terms: D002244:Carbon / Q000737:chemistry / Q000378:metabolism*; D002384:Catalysis; D006046:Gold / Q000737:chemistry / Q000378:metabolism*; D006859:Hydrogen / Q000737:chemistry / Q000378:metabolism*; D053758:Nanoparticles / Q000737:chemistry / Q000378:metabolism*; D010084:Oxidation-Reduction; D010316:Particle Size; D055494:Pycnoporus / Q000166:cytology / Q000378:metabolism*; D013499:Surface Properties
chemical_list: D002244:Carbon; D006046:Gold; D006859:Hydrogen
keywords: biosynthesis; catalyst recycling; core-shell structure; electron transfer; hydrogen evolution reaction