The DOI matches its Crossref record; 8 of the 8 references it cites were found in a registry or an index.
Single-Atomic Cu with Multiple Oxygen Vacancies on Ceria for Electrocatalytic CO2 Reduction to CH4
Abstract
The electrocatalytic reduction of CO 2 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 CeO 2 to optimize the CO 2 electrocatalytic reduction to CH 4 . We carried out theoretical calculations to predict that the single-atomic Cu substitution in CeO 2 (110) surface can stably enrich up to three oxygen vacancies around each Cu site, yielding a highly effective catalytic center for CO 2 adsorption and activation. This theoretical prediction is consistent with our controlled synthesis of the Cu-doped, mesoporous CeO 2 nanorods. Structural characterizations indicate that the low concentration (<5%) Cu species in CeO 2 nanorods are highly dispersed at single-atomic level with an unconventionally low coordination number ∼5, suggesting the direct association of 3 oxygen vacancies with each Cu ion on surfaces. This multiple oxygen vacancy-bound, single atomic Cu-substituted CeO 2 enables an excellent electrocatalytic selectivity in reducing CO 2 to methane with a faradaic efficiency as high as 58%, suggesting strong capabilities of rational design of electrocatalyst active centers for boosting activity and selectivity.
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Citations
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Electronic Tuning of Co, Ni‐Based Nanostructured (Hydr)oxides for Aqueous Electrocatalysis
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Self-citation
Metadata
- Authors
- Wang, Y., Chen, Z., Han, P., Du, Y., Gu, Z., Xu, X., & Zheng, G.
- Venue
- ACS Catalysis
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-06-22
- Volume
- 8
- Issue
- 8
- Pages
- 7113-7119
- ISSN
- 2155-5435 (ISSN-L)
- OpenAlex
- W2809213534
- Cited by
- 682
- References
- 8
- FWCI
- 14.70
- Type
- journal article
- Language
- en
- Open access
- closed
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