Efficient photoelectrochemical conversion of CO2 to syngas by photocathode engineering

Chu, Sheng Yuan; Ou, Pengfei; Rashid, Roksana Tonny; Pan, Yuyang; Liang, Daolun; Zhang, Huiyan; Song, Jun

doi:10.1016/j.gee.2020.11.015

Cited by 19 publications

(16 citation statements)

References 89 publications

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“…Figure b presents the CO to H 2 ratios at an applied potential from −0.11 to 0.3 V vs RHE for the Au–TiO 2 /HCl-treated InP NP photocathodes with different Au deposition times. In general, the CO/H 2 ratio is higher at the more negative potential for individual photocathode, whereas, at the same applied potential, the Au layer with longer deposition time contributes to a higher CO/H 2 ratio, which is in line with a recent report . Nyquist plots of the photocathodes are shown in Figures S11 and c.…”

Section: Resultssupporting

confidence: 89%

“…In general, the CO/H 2 ratio is higher at the more negative potential for individual photocathode, whereas, at the same applied potential, the Au layer with longer deposition time contributes to a higher CO/H 2 ratio, which is in line with a recent report. 62 Nyquist plots of the photocathodes are shown in Figures S11 and 3c. The data collected under illumination are fitted by the equivalent circuit displayed as an inset of Figure 3c and Table S1.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Manipulating Intermediates at the Au–TiO₂ Interface over InP Nanopillar Array for Photoelectrochemical CO₂ Reduction

et al. 2021

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Photoelectrochemical (PEC) reduction of CO 2 with H 2 O is a promising approach to convert solar energy and greenhouse gas into valueadded chemicals or fuels. However, the exact role of structures and interfaces of photoelectrodes in governing the photoelectrocatalytic processes in terms of both activity and selectivity remains elusive. Herein, by systematically investigating the InP photocathodes with Au−TiO 2 interfaces, we discover that nanostructuring of InP can not only enhance the photoresponse owing to increased light absorption and prolonged minority carrier lifetime, but also improve selectivity toward CO production by providing more abundant interfacial contact points between Au and TiO 2 than planar photocathodes. In addition, theoretical studies on the Au−TiO 2 interface demonstrate that the charge transfer between Au and TiO 2 , which is locally confined to the interface, strengthens the binding of the CO* intermediate on positively charged Au interfacial sites, thus improving CO 2 photoelectroreduction to form CO. An optimal Au−TiO 2 /InP nanopillar-array photocathode exhibits an onset potential of +0.3 V vs reversible hydrogen electrode (RHE) and a Faradaic efficiency of 84.2% for CO production at −0.11 V vs RHE under simulated AM 1.5G illumination at 1 sun. The present findings of the synergistic effects of the structure and interface on the photoresponse and selectivity of a photoelectrode provide insights into the development of III−V semiconductor-based PEC systems for solar fuel generation.

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Section: Resultssupporting

confidence: 89%

Section: ■ Results and Discussionmentioning

confidence: 99%

Manipulating Intermediates at the Au–TiO₂ Interface over InP Nanopillar Array for Photoelectrochemical CO₂ Reduction

et al. 2021

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“…Furthermore, the size effect of Au nanoparticles was studied for syngas This journal is © The Royal Society of Chemistry 2023 production on a GaN/n + -p Si photocathode. 180 A gradual increase in CO selectivity with decreasing H 2 selectivity was observed with increasing particle size at 0.17 V RHE under solar irradiation (Fig. 20d).…”

Section: Co Productionmentioning

confidence: 84%

One-dimensional III-nitrides: towards ultrahigh efficiency, ultrahigh stability artificial photosynthesis

Dong

2023

J. Mater. Chem. A

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“…According to the diverse transfer pathways, the main products could be CO, HCHO, HCOOH, CH 3 OH, CH 4 etc. 8,9 The photocatalytic efficiency and activity are determined by three crucial factors, which are light harvesting, charge separation and transportation, as well as the surface reaction. 10,11 Hence, to obtain high photocatalytic performance, wide light absorption, effective charge separation and transportation, and rapid surface reaction are indispensable.…”

Section: Introductionmentioning

confidence: 99%

Cu-doped SnS₂ nanosheets with superior visible-light photocatalytic CO₂ reduction performance

Cao

Liu

et al. 2023

Phys. Chem. Chem. Phys.

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Efficient photoelectrochemical conversion of CO2 to syngas by photocathode engineering

Cited by 19 publications

References 89 publications

Manipulating Intermediates at the Au–TiO₂ Interface over InP Nanopillar Array for Photoelectrochemical CO₂ Reduction

Manipulating Intermediates at the Au–TiO₂ Interface over InP Nanopillar Array for Photoelectrochemical CO₂ Reduction

One-dimensional III-nitrides: towards ultrahigh efficiency, ultrahigh stability artificial photosynthesis

Cu-doped SnS₂ nanosheets with superior visible-light photocatalytic CO₂ reduction performance

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Efficient photoelectrochemical conversion of CO2 to syngas by photocathode engineering

Cited by 19 publications

References 89 publications

Manipulating Intermediates at the Au–TiO2 Interface over InP Nanopillar Array for Photoelectrochemical CO2 Reduction

Manipulating Intermediates at the Au–TiO2 Interface over InP Nanopillar Array for Photoelectrochemical CO2 Reduction

One-dimensional III-nitrides: towards ultrahigh efficiency, ultrahigh stability artificial photosynthesis

Cu-doped SnS2 nanosheets with superior visible-light photocatalytic CO2 reduction performance

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Product

Resources

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Manipulating Intermediates at the Au–TiO₂ Interface over InP Nanopillar Array for Photoelectrochemical CO₂ Reduction

Manipulating Intermediates at the Au–TiO₂ Interface over InP Nanopillar Array for Photoelectrochemical CO₂ Reduction

Cu-doped SnS₂ nanosheets with superior visible-light photocatalytic CO₂ reduction performance