期刊
AICHE JOURNAL
卷 66, 期 4, 页码 -出版社
WILEY
DOI: 10.1002/aic.16897
关键词
CO2 fixation; Curli nanofiber; microbial electrocatalysis; stainless-steel electrode; synthetic biology
资金
- China Postdoctoral Science Foundation [2018M630531]
- National Natural Science Foundation of China [51578266, 31870112, 51708254]
- National Postdoctoral Program for Innovative Talents [BX20180131]
- Natural Science Foundation of Jiangsu Province [BK20160015, BK20170545]
Microbial electrocatalysis systems (MES) provide a cutting-edge solution to global problems associated with the environment and energy, but practical applications are hindered by the expensive electrode materials. Although stainless steel (SS) has been proposed as a promising inexpensive candidate, poor cell/SS interaction results in a low performance for MES. Here, a new synthetic biology approach was established for reinforcing the cell/SS interaction. Hybridized curli nanofibers fused with a metal-binding domain were heterogeneously expressed onto the cell surface, which realized efficient cell binding with the SS electrode. Consequently, it enabled a similar to 420-fold improvement of the anodic power output and a substantial enhancement of the cathodic Coulombic efficiency (from 0.6 to 4% to over 80%) with an SS electrode. This work demonstrates low-cost MES with an SS electrode and introduces a new avenue to engineer the cell/electrode interaction, which is promising for future practical applications of MES.
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