Three-dimensional porous Au nanocoral structure decorated with Pt submonolayer via galvanic displacement of copper adatoms for electrooxidation of formic acid
- Авторы: Hu J.1, Li H.1, Gan Q.1, Li Y.1
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Учреждения:
- State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Chemistry and Chemical Engineering
- Выпуск: Том 52, № 4 (2016)
- Страницы: 355-361
- Раздел: Article
- URL: https://journals.rcsi.science/1023-1935/article/view/187816
- DOI: https://doi.org/10.1134/S1023193516040054
- ID: 187816
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Аннотация
Three-dimensional (3D) porous Au nanocoral network (GNN) structure was fabricated on glassy carbon (GC) electrode by one-step, template-free electrodeposition and decorated with ultrathin Pt film by combining the underpotential deposition (UPD) of copper adatoms and the galvanic displacement (GD) between PtCl62- and Cu. The thickness of Pt atomic layers can be controlled precisely by repeating the UPD–GD process. Scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) were employed to characterize the morphology of GNN and Ptn/GNN (n, the cycles of repeating the UPD–GD process). Cyclic voltammometric and chronoamperometric tests indicate that all Ptn/GNN samples effectively support the direct oxidation of formic acid and show higher electrocatalytic performance than the commercial Pt/C catalyst (Pt, 20 wt %, Johnson Matthey Co.), where Pt1/GNN completely eliminates the indirect oxidation of formic acid, exhibiting the best electrocatalytic activity and stability among all Ptn/GNN samples due to the optimal coverage and distribution of Pt atoms on GNN.
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Об авторах
Jun Hu
State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Chemistry and Chemical Engineering
Email: liyje@hnu.edu.cn
Китай, Changsha, 410082
Huan Li
State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Chemistry and Chemical Engineering
Email: liyje@hnu.edu.cn
Китай, Changsha, 410082
Qi-Min Gan
State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Chemistry and Chemical Engineering
Email: liyje@hnu.edu.cn
Китай, Changsha, 410082
Yong-Jun Li
State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Chemistry and Chemical Engineering
Автор, ответственный за переписку.
Email: liyje@hnu.edu.cn
Китай, Changsha, 410082