Selectively converting CO2 to HCOOH on Cu-alloys integrated in hematite-driven artificial photosynthetic cells

Jiwu Zhao; Liang Huang; Lan Xue; Zhenjie Niu; Zizhong Zhang; Zhengxin Ding; Rusheng Yuan; Xu Lu; Jinlin Long

doi:10.1016/j.jechem.2022.12.062

Selectively converting CO2 to HCOOH on Cu-alloys integrated in hematite-driven artificial photosynthetic cells

Jiwu Zhao, Liang Huang, Lan Xue, Zhenjie Niu, Zizhong Zhang, Zhengxin Ding, Rusheng Yuan, Xu Lu, Jinlin Long

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

The integration of electrochemical CO2 reduction (CO2RR) and photoelectrochemical water oxidation offers a sustainable access to valuable chemicals and fuels. Here, we develop a rapidly annealed hematite photoanode with a photocurrent density of 2.83 mA cm−2 at 1.7 VRHE to drive the full-reaction. We also present Cu-alloys electrocatalysis extended from CuInSnS4, which are superior in both activity and selectivity for CO2RR. Specifically, the screened CuInSn achieves a CO2 to HCOOH Faradaic efficiency of 93% at a cell voltage of −2.0 V by assembling into artificial photosynthesis cell. The stability test of IT exhibits less than 3% degradation over 24 h. Furthermore, in-situ Raman spectroscopy reveals that both CO32- and CO2 are involved in CO2RR as reactants. The preferential affinity of C for H in the *HCO2 intermediate enables an improved HCOOH-selectivity, highlighting the role of multifunctional Cu in reducing the cell voltage and enhancing the photocurrent density.

Original language	English (US)
Pages (from-to)	601-610
Number of pages	10
Journal	Journal of Energy Chemistry
Volume	79
DOIs	https://doi.org/10.1016/j.jechem.2022.12.062
State	Published - Feb 16 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-03-01
Acknowledged KAUST grant number(s): BAS/1/1413-01-01
Acknowledgements: This work was financially supported by the National Key R&D Program of China (2018YFE0208500) and the National Natural Science Foundation of China (Grants No. 22072022). X. L. was funded by King Abdullah University of Science and Technology (KAUST) through the baseline funding (BAS/1/1413-01-01).

ASJC Scopus subject areas

Electrochemistry
Energy Engineering and Power Technology
Energy (miscellaneous)
Fuel Technology

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10.1016/j.jechem.2022.12.062

https://repository.kaust.edu.sa/bitstream/10754/689486/1/Proofread%20manuscript.pdf

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title = "Selectively converting CO2 to HCOOH on Cu-alloys integrated in hematite-driven artificial photosynthetic cells",

abstract = "The integration of electrochemical CO2 reduction (CO2RR) and photoelectrochemical water oxidation offers a sustainable access to valuable chemicals and fuels. Here, we develop a rapidly annealed hematite photoanode with a photocurrent density of 2.83 mA cm−2 at 1.7 VRHE to drive the full-reaction. We also present Cu-alloys electrocatalysis extended from CuInSnS4, which are superior in both activity and selectivity for CO2RR. Specifically, the screened CuInSn achieves a CO2 to HCOOH Faradaic efficiency of 93% at a cell voltage of −2.0 V by assembling into artificial photosynthesis cell. The stability test of IT exhibits less than 3% degradation over 24 h. Furthermore, in-situ Raman spectroscopy reveals that both CO32- and CO2 are involved in CO2RR as reactants. The preferential affinity of C for H in the *HCO2 intermediate enables an improved HCOOH-selectivity, highlighting the role of multifunctional Cu in reducing the cell voltage and enhancing the photocurrent density.",

author = "Jiwu Zhao and Liang Huang and Lan Xue and Zhenjie Niu and Zizhong Zhang and Zhengxin Ding and Rusheng Yuan and Xu Lu and Jinlin Long",

note = "KAUST Repository Item: Exported on 2023-03-01 Acknowledged KAUST grant number(s): BAS/1/1413-01-01 Acknowledgements: This work was financially supported by the National Key R&D Program of China (2018YFE0208500) and the National Natural Science Foundation of China (Grants No. 22072022). X. L. was funded by King Abdullah University of Science and Technology (KAUST) through the baseline funding (BAS/1/1413-01-01).",

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doi = "10.1016/j.jechem.2022.12.062",

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AU - Zhao, Jiwu

AU - Huang, Liang

AU - Xue, Lan

AU - Niu, Zhenjie

AU - Zhang, Zizhong

AU - Ding, Zhengxin

AU - Yuan, Rusheng

AU - Lu, Xu

AU - Long, Jinlin

N1 - KAUST Repository Item: Exported on 2023-03-01 Acknowledged KAUST grant number(s): BAS/1/1413-01-01 Acknowledgements: This work was financially supported by the National Key R&D Program of China (2018YFE0208500) and the National Natural Science Foundation of China (Grants No. 22072022). X. L. was funded by King Abdullah University of Science and Technology (KAUST) through the baseline funding (BAS/1/1413-01-01).

PY - 2023/2/16

Y1 - 2023/2/16

N2 - The integration of electrochemical CO2 reduction (CO2RR) and photoelectrochemical water oxidation offers a sustainable access to valuable chemicals and fuels. Here, we develop a rapidly annealed hematite photoanode with a photocurrent density of 2.83 mA cm−2 at 1.7 VRHE to drive the full-reaction. We also present Cu-alloys electrocatalysis extended from CuInSnS4, which are superior in both activity and selectivity for CO2RR. Specifically, the screened CuInSn achieves a CO2 to HCOOH Faradaic efficiency of 93% at a cell voltage of −2.0 V by assembling into artificial photosynthesis cell. The stability test of IT exhibits less than 3% degradation over 24 h. Furthermore, in-situ Raman spectroscopy reveals that both CO32- and CO2 are involved in CO2RR as reactants. The preferential affinity of C for H in the *HCO2 intermediate enables an improved HCOOH-selectivity, highlighting the role of multifunctional Cu in reducing the cell voltage and enhancing the photocurrent density.

AB - The integration of electrochemical CO2 reduction (CO2RR) and photoelectrochemical water oxidation offers a sustainable access to valuable chemicals and fuels. Here, we develop a rapidly annealed hematite photoanode with a photocurrent density of 2.83 mA cm−2 at 1.7 VRHE to drive the full-reaction. We also present Cu-alloys electrocatalysis extended from CuInSnS4, which are superior in both activity and selectivity for CO2RR. Specifically, the screened CuInSn achieves a CO2 to HCOOH Faradaic efficiency of 93% at a cell voltage of −2.0 V by assembling into artificial photosynthesis cell. The stability test of IT exhibits less than 3% degradation over 24 h. Furthermore, in-situ Raman spectroscopy reveals that both CO32- and CO2 are involved in CO2RR as reactants. The preferential affinity of C for H in the *HCO2 intermediate enables an improved HCOOH-selectivity, highlighting the role of multifunctional Cu in reducing the cell voltage and enhancing the photocurrent density.

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JO - Journal of Energy Chemistry

JF - Journal of Energy Chemistry

ER -

Selectively converting CO2 to HCOOH on Cu-alloys integrated in hematite-driven artificial photosynthetic cells

Abstract

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