Premium
SDS‐modified Nanoporous Silver as an Efficient Electrocatalyst for Selectively Converting CO 2 to CO in Aqueous Solution
Author(s) -
Shi Lei,
Zhang Yuning,
Han Xiaofei,
Niu Dongfang,
Sun Jinlong,
Yang Jenny Y.,
Hu Shuozhen,
Zhang Xinsheng
Publication year - 2019
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201800579
Subject(s) - chemistry , nanoporous , electrolysis , electrochemistry , aqueous solution , electrocatalyst , electrode , chemical engineering , faraday efficiency , scanning electron microscope , sodium dodecyl sulfate , inorganic chemistry , nuclear chemistry , electrolyte , materials science , chromatography , organic chemistry , composite material , engineering
Summary of main observation and conclusion Selectively electrochemical conversion of CO 2 into organic fuel using renewable electricity is one of the most sought‐after processes. In this paper, we report the electrochemical reduction of CO 2 (CO 2 RR) on the nanoporous Ag electrodes made of compacted Ag nanoparticles (AgNPs), which were prepared by one‐step reduction in the water phase with or without the surfactant sodium dodecyl sulfate (SDS). The scanning electron microscope (SEM) characterizations show that the compacted Ag electrodes have the nanoporous morphology formed by stacking AgNPs. Compared with the nanoporous Ag electrode without SDS modification (C‐AgNPs), the SDS‐modified AgNPs electrode (C‐AgNPs‐SDS) is highly effective in improving selective CO production in a wide range of potentials (–0.69 V — –1.19 V, vs . RHE), with a Faradaic efficiency of 92.2% and a current density of –8.23 mA·cm –2 for CO production at –0.79 V ( vs . RHE). C‐AgNPs‐SDS is also catalytically stable with only less than 7% deactivation after 8 h of continuous electrolysis.