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Biorefining of precious metals from wastes: an answer to manufacturing of cheap nanocatalysts for fuel cells and power generation via an integrated biorefinery?

Biorefining of precious metals from wastes: an answer to manufacturing of cheap nanocatalysts for... Bio-manufacturing of nano-scale palladium was achieved via enzymatically-mediated deposition of Pd from solution using Desulfovibrio desulfuricans, Escherichia coli and Cupriavidus metallidurans. Dried ‘Bio-Pd’ materials were sintered, applied onto carbon papers and tested as anodes in a proton exchange membrane (PEM) fuel cell for power production. At a Pd(0) loading of 25% by mass the fuel cell power using Bio-Pd D. desulfuricans (positive control) and Bio-Pd E. coli (negative control) was ~140 and ~30 mW respectively. Bio-Pd C. metallidurans was intermediate between these with a power output of ~60 mW. An engineered strain of E. coli (IC007) was previously reported to give a Bio-Pd that was >3-fold more active than Bio-Pd of the parent E. coli MC4100 (i.e. a power output of >110 mW). Using this strain, a mixed metallic catalyst was manufactured from an industrial processing waste. This ‘Bio-precious metal’ (‘Bio-PM’) gave ~68% of the power output as commercial Pd(0) and ~50% of that of Bio-Pd D. desulfuricans when used as fuel cell anodic material. The results are discussed in relation to integrated bioprocessing for clean energy. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Biotechnology Letters Springer Journals

Biorefining of precious metals from wastes: an answer to manufacturing of cheap nanocatalysts for fuel cells and power generation via an integrated biorefinery?

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References (33)

Publisher
Springer Journals
Copyright
Copyright © 2010 by Springer Science+Business Media B.V.
Subject
Life Sciences; Biochemistry, general; Applied Microbiology; Biotechnology; Microbiology
ISSN
0141-5492
eISSN
1573-6776
DOI
10.1007/s10529-010-0378-6
pmid
20734111
Publisher site
See Article on Publisher Site

Abstract

Bio-manufacturing of nano-scale palladium was achieved via enzymatically-mediated deposition of Pd from solution using Desulfovibrio desulfuricans, Escherichia coli and Cupriavidus metallidurans. Dried ‘Bio-Pd’ materials were sintered, applied onto carbon papers and tested as anodes in a proton exchange membrane (PEM) fuel cell for power production. At a Pd(0) loading of 25% by mass the fuel cell power using Bio-Pd D. desulfuricans (positive control) and Bio-Pd E. coli (negative control) was ~140 and ~30 mW respectively. Bio-Pd C. metallidurans was intermediate between these with a power output of ~60 mW. An engineered strain of E. coli (IC007) was previously reported to give a Bio-Pd that was >3-fold more active than Bio-Pd of the parent E. coli MC4100 (i.e. a power output of >110 mW). Using this strain, a mixed metallic catalyst was manufactured from an industrial processing waste. This ‘Bio-precious metal’ (‘Bio-PM’) gave ~68% of the power output as commercial Pd(0) and ~50% of that of Bio-Pd D. desulfuricans when used as fuel cell anodic material. The results are discussed in relation to integrated bioprocessing for clean energy.

Journal

Biotechnology Letters – Springer Journals

Published: Aug 24, 2010

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