Journal of Inorganic Materials, Volume. 37, Issue 10, 1093(2022)
Figures & Tables(24)
1. Schematic diagram of the fabrication of BiZnx /Si photoelectrocathode and CO2 reduction process
2. (a) Physical picture and (b) schematic model of photoelectrochemical cell for CO2 reduction
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
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
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
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
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
9. Mechanismic schematic of formation process of HCOOH on the photocathode BiZn2/Si
S3. i -t curves of (a) Bi/Si, (b) BiZn1/Si, (c) BiZn2/Si and (d) BiZn3/Si
S4. (a-c) Images of retention time H2, CO and O2, (d) H1 NMR spectrum of liquid product
S5. FE for PEC CO2 to CO, H2, HCOOH productions over BiZn2/Si, Bi/Si and Zn/Si
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
S7. (a) Photocurrent curves of BiZn2/Si, Bi/Si and Si-T, (b) PL spectra of BiZn2/Si, Bi/Si and Si-T
S8. Cycling stability runs of BiZn2/Si in CO2-saturated 0.5 mol·L-1 KHCO3 solution
S9. (a) XRD patterns of BiZn2/Si before and after stability test, (b) typical SEM image of BiZn2/Si after stability test
S10. CV curves for (a) Bi/Si, (b) BiZn1/Si, (c) BiZn2/Si and (d) BiZn3/Si at different scan rates
S12. FT-IR spectra of BiZn2/Si before and after photoelectrochemical CO2 reduction reaction
Table 1. Bi/Zn molar ratios of different samples in ICP results
View tableView in ArticleTable 1. Bi/Zn molar ratios of different samples in ICP results
Sample BiZn1/Si BiZn2/Si BiZn3/Si (n)Bi/(n)Zn 142 120 88
Table 2. Faraday efficiency and current density comparison of different photo/electrocatalysts
View tableView in ArticleTable 2. 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 [ 1 ]SnO2 0.5 mol·L-1 NaOH -0.6 vs. RHE -3.5 67.6% EC [ 2 ]Sn foil 0.5 mol·L-1 KHCO3 -2.0 vs. SCE -28 63.5% EC [ 3 ]Sn dendrite 0.1 mol·L-1 KHCO3 -1.36 vs. RHE -17.1 71.6% EC [ 4 ]Sn GDE 0.5 mol·L-1 KHCO3 -1. 8 vs. SCE -22.2 78.6% EC [ 5 ]2,2’-bpy-coordinated Cu 0.5 mol·L-1 KHCO3 -1.2 vs. RHE -15 57.7% PEC [ 6 ]Si/Bi5 0.5 mol·L-1 KHCO3 -1.03 vs. RHE -24.1 72.1% PEC [ 7 ]Bi-PMo nanosheets 0.5 mol·L-1 NaHCO3 -0.86 vs. RHE -30 93% EC [ 8 ]Bi2O3 nanoparticle 0.5 mol·L-1 NaHCO3 -1.2 vs. RHE -22 91% EC [ 9 ]p-Si/Bi 0.5 mol·L-1 NaHCO3 -0.9 vs. RHE -12 90% PEC [ 10 ]Bi nanoflakes 0.1 mol·L-1 KHCO3 -0.4 vs. RHE - 79.5% EC [ 11 ]Cu25In75 0.5 mol·L-1 NaHCO3 -0.7 vs. RHE - 84.1% EC [ 12 ]In1.5Cu0.5 NPs 0.1 mol·L-1 KHCO3 -1.2 vs. RHE -3.59 90% EC [ 13 ]This work 0.5 mol·L-1 KHCO3 -0.8 vs. RHE -6.45 96.1% PEC This work
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Chengjin LI, Yi XUE, Xiaoxia ZHOU, Hangrong CHEN.
Paper Information
Category: RESEARCH ARTICLE
Received: Jan. 17, 2022
Accepted: --
Published Online: Jan. 12, 2023
The Author Email: Xiaoxia ZHOU (zhouxiaoxia@mail.sic.ac.cn)
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