Abstract
Oxides containing two-dimensional metallic catalysts have shown enhanced catalytic activity, stability, and product selectivity. Porous three-dimensional structures maximize the accessibility of the active sites, thus enhancing the catalytic performance of the catalysts. By integrating these desirable features in a single catalyst, further improvement in catalytic activity and selectivity is expected. In this study, oxide-containing bismuth (Bi) nanosheets of about 4 nm thickness interconnected to form a porous three-dimensional structure were synthesized by electrodeposition in the presence of phosphomolybdic acid under hydrogen evolution conditions. These Bi nanosheets catalyze CO2 reduction in a CO2 -saturated 0.5 m NaHCO3 solution to formate with a faradaic efficiency of 93±2 % at −0.86 V vs. RHE with a formate partial current density as high as 30 mA cm −2 . The Tafel slope of about 78 mV dec −1 suggests that the protonation of the adsorbed CO 2 .− is the rate-limiting step.
| Original language | English |
|---|---|
| Pages (from-to) | 1091-1100 |
| Number of pages | 10 |
| Journal | ChemSusChem |
| Volume | 12 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 Jan 2019 |
Keywords
- bismuth
- carbon dioxide
- electrocatalysis
- polyoxometalates
- porous materials
Cite this
}
Phosphomolybdic Acid-Assisted Growth of Ultrathin Bismuth Nanosheets for Enhanced Electrocatalytic Reduction of CO2 to Formate. / Guo, Si Xuan; Zhang, Ying; Zhang, Xiaolong; Easton, Christopher D.; MacFarlane, Douglas R.; Zhang, Jie.
In: ChemSusChem, Vol. 12, No. 5, 01.01.2019, p. 1091-1100.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Phosphomolybdic Acid-Assisted Growth of Ultrathin Bismuth Nanosheets for Enhanced Electrocatalytic Reduction of CO2 to Formate
AU - Guo, Si Xuan
AU - Zhang, Ying
AU - Zhang, Xiaolong
AU - Easton, Christopher D.
AU - MacFarlane, Douglas R.
AU - Zhang, Jie
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Oxides containing two-dimensional metallic catalysts have shown enhanced catalytic activity, stability, and product selectivity. Porous three-dimensional structures maximize the accessibility of the active sites, thus enhancing the catalytic performance of the catalysts. By integrating these desirable features in a single catalyst, further improvement in catalytic activity and selectivity is expected. In this study, oxide-containing bismuth (Bi) nanosheets of about 4 nm thickness interconnected to form a porous three-dimensional structure were synthesized by electrodeposition in the presence of phosphomolybdic acid under hydrogen evolution conditions. These Bi nanosheets catalyze CO2 reduction in a CO2 -saturated 0.5 m NaHCO3 solution to formate with a faradaic efficiency of 93±2 % at −0.86 V vs. RHE with a formate partial current density as high as 30 mA cm −2 . The Tafel slope of about 78 mV dec −1 suggests that the protonation of the adsorbed CO 2 .− is the rate-limiting step.
AB - Oxides containing two-dimensional metallic catalysts have shown enhanced catalytic activity, stability, and product selectivity. Porous three-dimensional structures maximize the accessibility of the active sites, thus enhancing the catalytic performance of the catalysts. By integrating these desirable features in a single catalyst, further improvement in catalytic activity and selectivity is expected. In this study, oxide-containing bismuth (Bi) nanosheets of about 4 nm thickness interconnected to form a porous three-dimensional structure were synthesized by electrodeposition in the presence of phosphomolybdic acid under hydrogen evolution conditions. These Bi nanosheets catalyze CO2 reduction in a CO2 -saturated 0.5 m NaHCO3 solution to formate with a faradaic efficiency of 93±2 % at −0.86 V vs. RHE with a formate partial current density as high as 30 mA cm −2 . The Tafel slope of about 78 mV dec −1 suggests that the protonation of the adsorbed CO 2 .− is the rate-limiting step.
KW - bismuth
KW - carbon dioxide
KW - electrocatalysis
KW - polyoxometalates
KW - porous materials
UR - http://www.scopus.com/inward/record.url?scp=85061242413&partnerID=8YFLogxK
U2 - 10.1002/cssc.201802409
DO - 10.1002/cssc.201802409
M3 - Article
VL - 12
SP - 1091
EP - 1100
JO - ChemSusChem
JF - ChemSusChem
SN - 1864-5631
IS - 5
ER -