Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (10): 1093-1101.DOI: 10.15541/jim20220027
Special Issue: 【能源环境】CO2绿色转换
• RESEARCH ARTICLE • Previous Articles Next Articles
LI Chengjin1,2(), XUE Yi1,2, ZHOU Xiaoxia2(
), CHEN Hangrong2
Received:
2022-01-17
Revised:
2022-04-18
Published:
2022-10-20
Online:
2022-04-26
Contact:
ZHOU Xiaoxia, associate professor. E-mail: zhouxiaoxia@mail.sic.ac.cnAbout author:
LI Chengjin (1995-), male, Master candidate. E-mail: ChengjinLL@163.com
Supported by:
CLC Number:
LI Chengjin, XUE Yi, ZHOU Xiaoxia, CHEN Hangrong. BiZnx/Si Photocathode: Preparation and CO2 Reduction Performance[J]. Journal of Inorganic Materials, 2022, 37(10): 1093-1101.
Fig. 3 SEM images of (a) planar-Si, (b) Si treated with NaOH solution, (c) Bi/Si, (d) BiZn1/Si, (e) BiZn2/Si, and (f) BiZn3/Si with (g-i) elemental mappings of BiZn2/Si
Fig. 4 (a) XRD patterns of Bi/Si, BiZn1/Si, BiZn2/Si, and BiZn3/Si, and (b) UV-Vis reflectivity spectra of Planar-Si, Si-T, Bi/Si, BiZn1/Si, BiZn2/Si and BiZn3/Si Colorful figures are available on website
Fig. 5 (a) High resolution Bi4f XPS spectra of Bi/Si, BiZn1/Si, BiZn2/Si and BiZn3/Si, (b) ratios of Bi3+/Bi0 for BiZn1/Si, BiZn2/Si, and BiZn3/Si, and (c) high resolution Zn2p XPS spectrum for BiZn2/Si Colorful figures are available on website
Fig. 6 (a) Transient photocurrent curves of Si-T, Bi/Si, BiZn1/Si, BiZn2/Si, and BiZn3/Si, (b) LSV curves of untreated Si (Planar Si), Si-T, Bi/Si, and BiZn2/Si in Ar or CO2-saturated 0.5 mol·L-1 KHCO3 aqueous solution, (c) FE histograms of CO2 reduction productions and (d) HCOOH current densities for Bi/Si, BiZn1/Si, BiZn2/Si, and BiZn3/Si, (e) electrochemical impedance spectra (EIS) of Si-T, Bi/Si and BiZn2/Si, and (f) stability of BiZn2/Si during 10 h test Colorful figures are available on website
Fig. 7 PEC and EC CO2 reduction performances of BiZn2/Si (a) Faradaic efficiency of CO2 reduction products; (b) HCOOH production rates; (c) EE. Colorful figures are available on website
Fig. 8 (a) ECSA lines of Bi/Si, BiZn1/Si, BiZn2/Si, and BiZn3/Si, and (b) oxidation LSV curves of PEC and EC CO2 reduction for BiZn2/Si in 0.1 mol·L-1 KOH aqueous solution
Fig. S6 1H NMR spectrum of the liquid phase products of BiZn2/Si in CO2-saturated 0.5 mol·L-1 KOH and Ar-saturated 0.5 mol·L-1 KHCO3 solutions for photoelechemical reduction of CO2
Sample | BiZn1/Si | BiZn2/Si | BiZn3/Si |
---|---|---|---|
(n)Bi/(n)Zn | 142 | 120 | 88 |
Table S1 Bi/Zn molar ratios of different samples in ICP results
Sample | BiZn1/Si | BiZn2/Si | BiZn3/Si |
---|---|---|---|
(n)Bi/(n)Zn | 142 | 120 | 88 |
Electrode | Electrolyte | Eapp/V | Jtotal/(mA·cm-2) | FEformate | Ref. |
---|---|---|---|---|---|
Sn/SnOx | 0.5 mol·L-1 KHCO3 | -0.7 vs. RHE | -2 | ~38% PEC | [ |
SnO2 | 0.5 mol·L-1 NaOH | -0.6 vs. RHE | -3.5 | 67.6% EC | [ |
Sn foil | 0.5 mol·L-1 KHCO3 | -2.0 vs. SCE | -28 | 63.5% EC | [ |
Sn dendrite | 0.1 mol·L-1 KHCO3 | -1.36 vs. RHE | -17.1 | 71.6% EC | [ |
Sn GDE | 0.5 mol·L-1 KHCO3 | -1. 8 vs. SCE | -22.2 | 78.6% EC | [ |
2,2’-bpy-coordinated Cu | 0.5 mol·L-1 KHCO3 | -1.2 vs. RHE | -15 | 57.7% PEC | [ |
Si/Bi5 | 0.5 mol·L-1 KHCO3 | -1.03 vs. RHE | -24.1 | 72.1% PEC | [ |
Bi-PMo nanosheets | 0.5 mol·L-1 NaHCO3 | -0.86 vs. RHE | -30 | 93% EC | [ |
Bi2O3 nanoparticle | 0.5 mol·L-1 NaHCO3 | -1.2 vs. RHE | -22 | 91% EC | [ |
p-Si/Bi | 0.5 mol·L-1 NaHCO3 | -0.9 vs. RHE | -12 | 90% PEC | [ |
Bi nanoflakes | 0.1 mol·L-1 KHCO3 | -0.4 vs. RHE | - | 79.5% EC | [ |
Cu25In75 | 0.5 mol·L-1 NaHCO3 | -0.7 vs. RHE | - | 84.1% EC | [ |
In1.5Cu0.5 NPs | 0.1 mol·L-1 KHCO3 | -1.2 vs. RHE | -3.59 | 90% EC | [ |
This work | 0.5 mol·L-1 KHCO3 | -0.8 vs. RHE | -6.45 | 96.1% PEC | This work |
Table S2 Faraday efficiency and current density comparison of different photo/electrocatalysts
Electrode | Electrolyte | Eapp/V | Jtotal/(mA·cm-2) | FEformate | Ref. |
---|---|---|---|---|---|
Sn/SnOx | 0.5 mol·L-1 KHCO3 | -0.7 vs. RHE | -2 | ~38% PEC | [ |
SnO2 | 0.5 mol·L-1 NaOH | -0.6 vs. RHE | -3.5 | 67.6% EC | [ |
Sn foil | 0.5 mol·L-1 KHCO3 | -2.0 vs. SCE | -28 | 63.5% EC | [ |
Sn dendrite | 0.1 mol·L-1 KHCO3 | -1.36 vs. RHE | -17.1 | 71.6% EC | [ |
Sn GDE | 0.5 mol·L-1 KHCO3 | -1. 8 vs. SCE | -22.2 | 78.6% EC | [ |
2,2’-bpy-coordinated Cu | 0.5 mol·L-1 KHCO3 | -1.2 vs. RHE | -15 | 57.7% PEC | [ |
Si/Bi5 | 0.5 mol·L-1 KHCO3 | -1.03 vs. RHE | -24.1 | 72.1% PEC | [ |
Bi-PMo nanosheets | 0.5 mol·L-1 NaHCO3 | -0.86 vs. RHE | -30 | 93% EC | [ |
Bi2O3 nanoparticle | 0.5 mol·L-1 NaHCO3 | -1.2 vs. RHE | -22 | 91% EC | [ |
p-Si/Bi | 0.5 mol·L-1 NaHCO3 | -0.9 vs. RHE | -12 | 90% PEC | [ |
Bi nanoflakes | 0.1 mol·L-1 KHCO3 | -0.4 vs. RHE | - | 79.5% EC | [ |
Cu25In75 | 0.5 mol·L-1 NaHCO3 | -0.7 vs. RHE | - | 84.1% EC | [ |
In1.5Cu0.5 NPs | 0.1 mol·L-1 KHCO3 | -1.2 vs. RHE | -3.59 | 90% EC | [ |
This work | 0.5 mol·L-1 KHCO3 | -0.8 vs. RHE | -6.45 | 96.1% PEC | This work |
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