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Regulating *OCHO In...
Regulating *OCHO Intermediate as Rate-Determining Step of Defective Oxynitride Nanosheets Enabling Robust CO2 Electroreduction
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Zhang, B. (författare)
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Chang, Y. (författare)
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Wu, Y. (författare)
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visa fler...
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Fan, Z. (författare)
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Zhai, P. (författare)
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Wang, C. (författare)
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Gao, J. (författare)
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- Sun, Licheng, 1962- (författare)
- KTH,Kemi
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Hou, J. (författare)
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visa färre...
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(creator_code:org_t)
- 2022-06-03
- 2022
- Engelska.
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Ingår i: Advanced Energy Materials. - : Wiley. - 1614-6832 .- 1614-6840. ; 12:27, s. 2200321-
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The electrochemical conversion of CO2 into hydrocarbons is an important approach to store sustainable energy and address climate concerns. However, it is a huge challenge to unearth a promising model for elucidating the role of dopants and vacancies on catalysts upon CO2 electroreduction. Herein, porous indium oxynitride nanosheets with simultaneous incorporation of nitrogen dopant and oxygen vacancy (Vo-N-InON) are reported for achieving efficient CO2 conversion to formic acid (HCOOH). As a result, the catalyst exhibits an extremely high formate selectivity of 95.1% at a low potential of −0.8 V versus reversible hydrogen electrode (RHE) compared with pristine In2O3, Vo-In2O3, and InN, delivering a large partial current density of 121.1 mA cm–2 for formate production at −1.13 V versus RHE in the flow cell. Density functional theory calculations reveal that the generation of *OCHO intermediate is the rate-determining step. The synergistic effect between nitrogen dopants and oxygen vacancies contributes to the activation of CO2, facilitates the charge transfer, and reduces the reaction free energy of *OCHO protonation. This work not only discloses a fundamental understanding of synergistic effects between nitrogen dopants and oxygen vacancies to improve catalytic performance, but also provides an effective platform toward CO2 conversion.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Catalyst selectivity
- Charge transfer
- Density functional theory
- Electrolytic reduction
- Formic acid
- Free energy
- Indium compounds
- Nanosheets
- Nitrides
- Oxygen vacancies
- *OCHO intermediate
- CO 2 electroreduction
- Electro reduction
- Nitrogen dopant
- Oxynitride nanosheet
- Oxynitrides
- Rate determining step
- Reversible hydrogen electrodes
- Synergistic effect
- ]+ catalyst
- Carbon dioxide
- CO <sub>2</sub> electroreduction
- nitrogen dopants
- oxynitride nanosheets
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- Av författaren/redakt...
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Zhang, B.
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Chang, Y.
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Wu, Y.
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Fan, Z.
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Zhai, P.
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Wang, C.
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visa fler...
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Gao, J.
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Sun, Licheng, 19 ...
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Hou, J.
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visa färre...
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