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Breaking Scaling Relationships in CO2 Reduction on Copper Alloys with Organic Additives.

ABSTRACT: Boundary conditions for catalyst performance in the conversion of common precursors such as N2, O2, H2O, and CO2 are governed by linear free energy and scaling relationships. Knowledge of these limits offers an impetus for designing strategies to alter reaction mechanisms to improve performance. Typically, experimental demonstrations of linear trends and deviations from them are composed of a small number of data points constrained by inherent experimental limitations. Herein, high-throughput experimentation on 14 bulk copper bimetallic alloys allowed for data-driven identification of a scaling relationship between the partial current densities of methane and C2+ products. This strict dependence represents an intrinsic limit to the Faradaic efficiency for C-C coupling. We have furthermore demonstrated that coating the electrodes with a molecular film breaks the scaling relationship to promote C2+ product formation.

SUBMITTER: Lai Y 

PROVIDER: S-EPMC8554824 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature

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Breaking Scaling Relationships in CO<sub>2</sub> Reduction on Copper Alloys with Organic Additives.

Lai Yungchieh Y   Watkins Nicholas B NB   Rosas-Hernández Alonso A   Thevenon Arnaud A   Heim Gavin P GP   Zhou Lan L   Wu Yueshen Y   Peters Jonas C JC   Gregoire John M JM   Agapie Theodor T  

ACS central science 20211014 10

Boundary conditions for catalyst performance in the conversion of common precursors such as N<sub>2</sub>, O<sub>2</sub>, H<sub>2</sub>O, and CO<sub>2</sub> are governed by linear free energy and scaling relationships. Knowledge of these limits offers an impetus for designing strategies to alter reaction mechanisms to improve performance. Typically, experimental demonstrations of linear trends and deviations from them are composed of a small number of data points constrained by inherent experime  ...[more]

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