Active Site Engineering via Optimizing the Heterogeneous Support Structure for Single-Atom Catalysis
Active Site Engineering via Optimizing the Heterogeneous Support Structure for Single-Atom Catalysis
复制标题
通过优化单原子催化的多相支撑结构进行活性位点工程
DOI:
10.1021/acs.jpcc.3c03915
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Skodje, Rex T.
中科院分区:
文献类型:
--
作者:
An, Suming;Patel, Prajay;Liu, Cong;Skodje, Rex T.
Supported single-atom catalysts show a large range of activities and selectivities that depend on the local environment of the catalytic sites. A theory-based optimization strategy is presented that is based on a density functional theory determination of the transition states and intermediates for a low-dimensional coordinate representation of the heterogeneity of the active sites. The approach is applied to a vanadium catalyst on an amorphous SiO2support that involves a large kinetic network described using a full chemistry model. Without assuminga prioriscaling relations or mechanism reduction, the optimal state of heterogeneity is found to lie at atomic configurations where the activation energies for two distinct key chemical processes are equal. It is founda posteriorithat the behavior of the system is consistent with linear free energy scaling relations in the randomness parameters. The energetic span theory proves quite useful in reducing the full chemistry model to a small number of key reactions. The use of a nonlinear optimization algorithm in combination with energetic span theory provides significant simplification in treating disordered systems.
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