%0 Online Multimedia
%A Li, Yuguang
C.
%A Lee, Geonhui
%A Yuan, Tiange
%A Wang, Ying
%A Nam, Dae-Hyun
%A Wang, Ziyun
%A Pelayo García de Arquer, F.
%A Lum, Yanwei
%A Dinh, Cao-Thang
%A Voznyy, Oleksandr
%A Sargent, Edward H.
%D 2019
%T CO2 Electroreduction from Carbonate Electrolyte
%U https://acs.figshare.com/articles/media/CO_sub_2_sub_Electroreduction_from_Carbonate_Electrolyte/8204594
%R 10.1021/acsenergylett.9b00975.s002
%2 https://acs.figshare.com/ndownloader/files/15291044
%K syngas product stream
%K CO 2 release
%K CO 2 electrolysis
%K CO 2
%K CO 2 Electroreduction
%K upgrades carbonate electrolyte
%K CO 2 conversion technologies
%X The
process of CO2 valorizationfrom capture
of CO2 to its electrochemical upgraderequires significant
inputs in each of the capture, upgrade, and separation steps. Here
we report an electrolyzer that upgrades carbonate electrolyte from
CO2 capture solution to syngas, achieving 100% carbon utilization
across the system. A bipolar membrane is used to produce proton in
situ to facilitate CO2 release at the membrane:catalyst
interface from the carbonate solution. Using a Ag catalyst, we generate
syngas at a 3:1 H2:CO ratio, and the product is not diluted
by CO2 at the gas outlet; we generate this pure syngas
product stream at a current density of 150 mA/cm2 and an
energy efficiency of 35%. The carbonate-to-syngas system is stable
under a continuous 145 h of catalytic operation. The work demonstrates
the benefits of coupling CO2 electrolysis with a CO2 capture electrolyte on the path to practicable CO2 conversion technologies.
%I ACS Publications