PMID- 32145551
OWN - NLM
STAT- MEDLINE
DCOM- 20200928
LR  - 20200928
IS  - 1096-0953 (Electronic)
IS  - 0013-9351 (Linking)
VI  - 184
DP  - 2020 May
TI  - Shewanella oneidensis MR-1 self-assembled Pd-cells-rGO conductive composite for 
      enhancing electrocatalysis.
PG  - 109317
LID - S0013-9351(20)30210-3 [pii]
LID - 10.1016/j.envres.2020.109317 [doi]
AB  - Biosynthesized noble metal nanoparticles (NPs) as promising green catalysts for 
      electrochemical application has invited a lot of attention. However, effective 
      electron transfer between biosynthesized NPs and electrode remains a challenge 
      due to the uncontrollable and poor conductive property of cell substrates. In 
      this study, graphene oxide (GO) was introduced into a bio-Pd synthesis process 
      governed by Shewanella oneidensis MR-1, which was demonstrated to be 
      simultaneously reduced with Pd(II) and transformed to reduced GO (rGO), resulting 
      in the formation of a Pd-cells-rGO composite. Compared to the control without rGO 
      (Pd-cells), the electrochemical conductivity of Pd-cells-rGO composite increased 
      from almost zero to 196 muS cm(-1), indicating the rGO facilities the electron 
      transport across the composite. Electrochemical characterizations revealed the 
      electrochemical active surface area (ECSA) of Pd in Pd-cells-rGO was enlarged by 
      increasing the amount of rGO in the composite, clearly indicating that the 
      conductive network created by rGO enable the Pd NPs receive electrons from 
      electrode and become electrochemical active. A considerable enhancement of 
      electrocatalytic activity was further confirmed for Pd-cells-rGO as indicated by 
      36.7- and 17.2-fold increase (Pd-cells-rGO with Pd/GO ratio of 5/1 vs Pd-cells) 
      of steady state current density toward hydrogen evolution and nitrobenzene 
      reduction at -0.7 V and -0.55 V vs Ag/AgCl, respectively. We also compared the 
      electrocatalytic performance with MWCNTs hybrids Pd-cells-CNTs. It was found that 
      the association of Pd, cells and rGO creates an interactive and synergistic 
      environment to allow higher conductivity and catalytic activity under the same 
      amount of carbon nanomaterial. The strategy developed in this work activates a 
      highly reactive NPs and proposed a designable protocol for enhancing 
      electrocatalytic activity of biocatalysts.
CI  - Copyright (c) 2020 Elsevier Inc. All rights reserved.
FAU - Hou, Ya-Nan
AU  - Hou YN
AD  - Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental 
      and Municipal Engineering, Tianjin Chengjian University, Tianjin, 300384, China; 
      Key Laboratory of Environmental Biotechnology, Research Center for 
      Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
FAU - Sun, Su-Yun
AU  - Sun SY
AD  - Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental 
      and Municipal Engineering, Tianjin Chengjian University, Tianjin, 300384, China.
FAU - Yang, Zhen-Ni
AU  - Yang ZN
AD  - Key Laboratory of Environmental Biotechnology, Research Center for 
      Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
FAU - Yun, Hui
AU  - Yun H
AD  - Gansu Key Laboratory of Biomonitoring and Bioremediation for Environment 
      Pollution, School of Life Science, Lanzhou University, Lanzhou, 730000, China.
FAU - Zhu, Ting-Ting
AU  - Zhu TT
AD  - School of Environmental Science and Engineering, Tianjin University, Tianjin, 
      300072, China.
FAU - Ma, Jin-Feng
AU  - Ma JF
AD  - Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental 
      and Municipal Engineering, Tianjin Chengjian University, Tianjin, 300384, China.
FAU - Han, Jing-Long
AU  - Han JL
AD  - Key Laboratory of Environmental Biotechnology, Research Center for 
      Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
FAU - Wang, Ai-Jie
AU  - Wang AJ
AD  - Key Laboratory of Environmental Biotechnology, Research Center for 
      Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
FAU - Cheng, Hao-Yi
AU  - Cheng HY
AD  - Key Laboratory of Environmental Biotechnology, Research Center for 
      Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; 
      School of Civil and Environmental Engineering, Harbin Institute of Technology 
      (Shenzhen), Shenzhen, 518055, China. Electronic address: hycheng@rcees.ac.cn.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20200229
PL  - Netherlands
TA  - Environ Res
JT  - Environmental research
JID - 0147621
RN  - 0 (graphene oxide)
RN  - 5TWQ1V240M (Palladium)
RN  - 7782-42-5 (Graphite)
RN  - Shewanella oneidensis
SB  - IM
MH  - Catalysis
MH  - *Graphite
MH  - *Metal Nanoparticles
MH  - Palladium
MH  - *Shewanella
OTO - NOTNLM
OT  - Biogenic palladium
OT  - Electrocatalytic activity
OT  - Graphene composite
OT  - Self-assembly
OT  - Shewanella oneidensis MR-1
COIS- Declaration of competing interests The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2020/03/08 06:00
MHDA- 2020/09/29 06:00
CRDT- 2020/03/08 06:00
PHST- 2019/12/31 00:00 [received]
PHST- 2020/02/26 00:00 [revised]
PHST- 2020/02/27 00:00 [accepted]
PHST- 2020/03/08 06:00 [pubmed]
PHST- 2020/09/29 06:00 [medline]
PHST- 2020/03/08 06:00 [entrez]
AID - S0013-9351(20)30210-3 [pii]
AID - 10.1016/j.envres.2020.109317 [doi]
PST - ppublish
SO  - Environ Res. 2020 May;184:109317. doi: 10.1016/j.envres.2020.109317. Epub 2020 
      Feb 29.