A unifying mechanism for cation effect modulating C1 and C2 productions from CO(2) electroreduction.
A unifying mechanism for cation effect modulating C1 and C2 productions from CO(2) electroreduction.
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阳离子效应调节 CO(2) 电还原生成 C1 和 C2 的统一机制。
DOI:
10.1038/s41467-022-33199-8
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发表时间:
2022-09-19
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Electrocatalysis, whose reaction venue locates at the catalyst–electrolyte interface, is controlled by the electron transfer across the electric double layer, envisaging a mechanistic link between the electron transfer rate and the electric double layer structure. A fine example is in the CO2 reduction reaction, of which rate shows a strong dependence on the alkali metal cation (M+) identity, but there is yet to be a unified molecular picture for that. Using quantum-mechanics-based atom-scale simulation, we herein scrutinize the M+-coupling capability to possible intermediates, and establish H+- and M+-associated ET mechanisms for CH4 and CO/C2H4 formations, respectively. These theoretical scenarios are successfully underpinned by Nernstian shifts of polarization curves with the H+ or M+ concentrations and the first-order kinetics of CO/C2H4 formation on the electrode surface charge density. Our finding further rationalizes the merit of using Nafion-coated electrode for enhanced C2 production in terms of enhanced surface charge density. CO2 reduction rate shows a strong dependence on alkali metal cation identity but a unified molecular picture for underlying mechanism requires further investigation. Using advanced molecular simulations and experimental kinetic studies, here the authors establish a unified mechanism for cation-coupled electron transfer.
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影响因子:
16.6
作者:
Deng W;Zhang P;Seger B;Gong J
通讯作者:
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13.6
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56.9
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Sargent, Edward H.
影响因子:
2.2
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通讯作者:
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16.6
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