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Cu Nanoparticles Modified Step-Scheme $Cu_{2}O/WO_{3}$ Heterojunction Nanoflakes for Visible-Light-Driven Conversion of $CO_{2}$ to $CH_{4}$
| Content Provider | MDPI |
|---|---|
| Author | Shi, Weina Wang, Ji-Chao Chen, Aimin Xu, Xin Wang, Shuai Li, Renlong Zhang, Wanqing Hou, Yuxia |
| Copyright Year | 2022 |
| Description | In this study, Cu and $Cu_{2}$O hybrid nanoparticles were synthesized onto the $WO_{3}$ nanoflake film using a one-step electrodeposition method. The critical advance is the use of a heterojunction consisting of $WO_{3}$ flakes and $Cu_{2}$O as an innovative stack design, thereby achieving excellent performance for $CO_{2}$ photoreduction with water vapor under visible light irradiation. Notably, with the modified Cu nanoparticles, the selectivity of $CH_{4}$ increased from nearly 0% to 96.7%, while that of CO fell down from 94.5% to 0%. The yields of $CH_{4}$, $H_{2}$ and $O_{2}$ reached 2.43, 0.32 and 3.45 $mmol/g_{cat}$ after 24 h of visible light irradiation, respectively. The boosted photocatalytic performance primarily originated from effective charge-transfer in the heterojunction and acceleration of electron-proton transfer in the presence of Cu nanoparticles. The S-scheme charge transfer mode was further proposed by the in situ-XPS measurement. In this regard, the heterojunction construction showed great significance in the design of efficient catalysts for $CO_{2}$ photoreduction application. |
| Starting Page | 2284 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12132284 |
| Journal | Nanomaterials |
| Issue Number | 13 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-07-02 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Environmental Sciences Co2 Reduction Selectivity Cu/cu2o/wo3 Photocatalysis S-scheme |
| Content Type | Text |
| Resource Type | Article |
