2021
DOI: 10.1002/anie.202102983
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The Hole‐Tunneling Heterojunction of Hematite‐Based Photoanodes Accelerates Photosynthetic Reaction

Abstract: Single‐atom metal‐insulator‐semiconductor (SMIS) heterojunctions based on Sn‐doped Fe2O3 nanorods (SF NRs) were designed by combining atomic deposition of an Al2O3 overlayer with chemical grafting of a RuOx hole‐collector for efficient CO2‐to‐syngas conversion. The RuOx‐Al2O3‐SF photoanode with a 3.0 nm thick Al2O3 overlayer gave a >5‐fold‐enhanced IPCE value of 52.0 % under 370 nm light irradiation at 1.2 V vs. Ag/AgCl, compared to the bare SF NRs. The dielectric field mediated the charge dynamics at the Al2O… Show more

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Cited by 41 publications
(27 citation statements)
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“…In photoelectrocatalysis (PEC), the applied external electric field promotes charge separation and increases redox reaction rates, thus improving the overall solar‐to‐fuel conversion efficiency. Constructing a photoelectrode with a metal‐insulator‐semiconductor heterostructure could mediate the charge dynamics process and further promote the solar to energy conversion efficiency [69] . Besides electric fields, other external triggers, including mechanical stress, microwaves, magnetic field, and/or coupled fields, could improve the catalytic performance of MHPs from the inside out.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…In photoelectrocatalysis (PEC), the applied external electric field promotes charge separation and increases redox reaction rates, thus improving the overall solar‐to‐fuel conversion efficiency. Constructing a photoelectrode with a metal‐insulator‐semiconductor heterostructure could mediate the charge dynamics process and further promote the solar to energy conversion efficiency [69] . Besides electric fields, other external triggers, including mechanical stress, microwaves, magnetic field, and/or coupled fields, could improve the catalytic performance of MHPs from the inside out.…”
Section: Discussionmentioning
confidence: 99%
“…Constructing a photoelectrode with a metal-insulator-semiconductor heterostructure could mediate the charge dynamics process and further promote the solar to energy conversion efficiency. [69] Besides electric fields, other external triggers, including mechanical stress, microwaves, magnetic field, and/or coupled fields, could improve the catalytic performance of MHPs from the inside out. For example, with an external mechanical force, a built-in electric field will be created in the MAPbI 3 to effectively separate the photogenerated charge carriers, thus enhancing the final photoactivity.…”
Section: Discussionmentioning
confidence: 99%
“…37 Copyright 2019, Wiley-VCH. (i) Time course for the formation of gaseous products in the different cells at 2.4 V. 38 Copyright 2021, Wiley-VCH.…”
Section: Status Of Photocatalytic Co 2 Conversion To C1 Productsmentioning
confidence: 99%
“…6 A PEC reaction system is a bionic system which simulates the behaviour of plants in nature to absorb and convert solar energy for hydrogen production. Therefore, designing photocatalysts of high-performance through an economically viable approach is of great importance; 7,8 semiconductor materials have been widely used in PEC water splitting owing to their excellent chemical, physical and electrical properties. [9][10][11][12] Among these semiconductor candidates, TiO 2 is a promising n-type semiconductor photoanode because of its non-toxicity, photocorrosion resistance and low cost.…”
Section: Introductionmentioning
confidence: 99%