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Insight into the electrocatalytic performance of in-situ fabricated electroactive biofilm-Pd: The role of biofilm thickness, initial Pd(II) concentration and the exposure time to Pd precursor
Hou, Ya-Nan; Ma, Jin-Feng; Yang, Zhen-Ni; Sun, Su-Yun; Wang, Ai-Jie; Cheng, Hao-Yi
2020-11-10
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume742Pages:1-9
AbstractBiogenic palladium (bio-Pd) nanoparticles have been considered as promising biocatalyst for energy generation and contaminants remediation in water and sediment. Recently, an electroactive biofilm-Pd (EAB-Pd) network, which can be used directly as electrocatalyst and showenhanced electrocatalytic performance, has exhibited tremendous application potential. However, the information regarding to the controllable biosynthetic process and corresponding catalytic properties is scarce. This study demonstrated that the catalytic performance of EAB-Pd could be influenced by Pd loading on bacteria cells (Pd/cells), which was crucial to determine the final distribution characteristic of Pd nanocrystal on EAB skeleton. For instance, the high Pd/cells (over 0.18 pg cell-1) exhibited almost 6-fold and 1.5-fold enhancement over EAB-Pds with Pd/cells below 0.03 in catalytic current toward hydrogen evolution reaction and nitrobenzene reduction, respectively. In addition, the Pd/cells was found to be affected by the synthesis factors, such as the ratio of biomass to initial Pd(II) concentration (cells/Pd-II) and the exposure time of EAB to Pd(II) precursor solution. The Pd/cells increased significantly as the cell/Pd-II ratio decreased from similar to 5.5 x 10(7) to similar to 1.3 x 10(7) cells L mg(-1) or the prolongation of exposure time from 3 h to 24 h. The findings developed in this work extensively expand our knowledge for the in-situ designing biogenic electrocatalyst and provide important information for the development of its catalytic property. (C) 2020 Elsevier B.V. All rights reserved.
Department中国科学院环境生物技术重点实验室
KeywordBiogenic Pd nanoparticles Electroactive biofilm EAB thickness Electrocatalytic performance
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/45174
Collection中国科学院环境生物技术重点实验室
Recommended Citation
GB/T 7714
Hou, Ya-Nan,Ma, Jin-Feng,Yang, Zhen-Ni,et al. Insight into the electrocatalytic performance of in-situ fabricated electroactive biofilm-Pd: The role of biofilm thickness, initial Pd(II) concentration and the exposure time to Pd precursor[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,742:1-9.
APA Hou, Ya-Nan,Ma, Jin-Feng,Yang, Zhen-Ni,Sun, Su-Yun,Wang, Ai-Jie,&Cheng, Hao-Yi.(2020).Insight into the electrocatalytic performance of in-situ fabricated electroactive biofilm-Pd: The role of biofilm thickness, initial Pd(II) concentration and the exposure time to Pd precursor.SCIENCE OF THE TOTAL ENVIRONMENT,742,1-9.
MLA Hou, Ya-Nan,et al."Insight into the electrocatalytic performance of in-situ fabricated electroactive biofilm-Pd: The role of biofilm thickness, initial Pd(II) concentration and the exposure time to Pd precursor".SCIENCE OF THE TOTAL ENVIRONMENT 742(2020):1-9.
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