Single-Atomic Cu with Multiple Oxygen Vacancies on Ceria for Electrocatalytic CO2 Reduction to CH4

By Yifei Wang, Zheng Chen, Peng Han, Yonghua Du, Zhengxiang Gu, Xin Xu, Gengfeng Zheng. ACS Catalysis, 2018

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The electrocatalytic reduction of CO2 into value-added chemicals such as hydrocarbons has the potential for supplying fuel energy and reducing environmental hazards, while the accurate tuning of electrocatalysts at the ultimate single-atomic level remains extremely challenging. In this work, we demonstrate an atomic design of multiple oxygen vacancy-bound, single-atomic Cu-substituted CeO2 to optimize the CO2 electrocatalytic reduction to CH4. We carried out theoretical calculations to predict that the single-atomic Cu substitution in CeO2(110) surface can stably enrich up to three oxygen vacancies around each Cu site, yielding a highly effective catalytic center for CO2 adsorption and activation. This theoretical prediction is consistent with our controlled synthesis of the Cu-doped, mesoporous CeO2 nanorods. Structural characterizations indicate that the low concentration (<5%) Cu species in CeO2 nanorods are highly dispersed at single-atomic level with an unconventionally low coordination number ∼5, su...

Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/fd773c5e05823f931ac5fd0617a17f23b1d1fe0d

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Citations in the corpus

Electrocatalytic carbon dioxide reduction: from fundamental principles to catalyst design (2020, background): “developed a Cu-doped cerium dioxide (CeO2) electrocatalyst for the selective reduction of CO2 to CH4 [169].”