10.6084/M9.FIGSHARE.19551730.V1
Lijie Zhang
Lijie
Zhang
Ying Zhang
Ying
Zhang
Hongtao Wang
Hongtao
Wang
Jianbing Chen
Jianbing
Chen
Zhongqi Cao
Zhongqi
Cao
Preparation of hollow Au<sub>x</sub>-Cu<sub>2</sub>O nanospheres by galvanic replacement to enhance the selective electrocatalytic CO<sub>2</sub> reduction to ethanol
<p>Electrocatalytic CO<sub>2</sub> reduction to fuel is one of the important ways to solve energy and environmental problems. In this work, the preparation of hollow Au<sub>x</sub>-Cu<sub>2</sub>O electrocatalyst and the performance of electrocatalytic CO<sub>2</sub> reduction to ethanol were studied. Hollow Cu<sub>2</sub>O nanospheres were prepared by a soft template method, and Au<sub>x</sub>-Cu<sub>2</sub>O composites were prepared by galvanic replacement. The characterization results of XRD and XPS reveal that Cu<sup>+</sup> is the main chemical state of Cu in the catalysts. The results of electroactive surface area demonstrate that the electroactive surface area of Au<sub>0.51</sub>-Cu<sub>2</sub>O is the largest. The performance evaluation of electrocatalytic CO<sub>2</sub> reduction shows that the Faraday efficiency of H<sub>2</sub> on Au<sub>0.51</sub>-Cu<sub>2</sub>O is the lowest (∼19.5%) and the Faraday efficiency of ethanol can reach ∼18.8% at −1.2 V vs. RHE. Compared with hollow Cu<sub>2</sub>O nanospheres, Au<sub>x</sub>-Cu<sub>2</sub>O catalysts have an earlier onset for ethanol production and promote the CO<sub>2</sub> reduction to ethanol with high efficiency, while the hydrogen evolution reaction is significantly inhibited. Our study demonstrates an effective approach to develop Cu-based electrocatalysts favourable toward ethanol in electrocatalytic CO<sub>2</sub> reduction.</p>
Environmental Sciences not elsewhere classified
Chemical Sciences not elsewhere classified
Sociology
Biological Sciences not elsewhere classified
Science Policy
Taylor & Francis
2022
2022-04-08
2024-02-12
Journal contribution
4131815 Bytes
10.6084/m9.figshare.19551730
10.1080/17458080.2021.2005246
CC BY 4.0