Journal
SMALL
Volume 17, Issue 10, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202006534
Keywords
alkaline medium; electrocatalysis; ethylene glycol oxidation reaction; mass activity; RhCu nanoboxes
Categories
Funding
- National Science Foundation Committee of China [51873100, 21875133, 51773112]
- Natural Science Foundation of Shaanxi Province [2019JM-037, 2020JZ-23]
- Program for Key Science & Technology Innovation Team of Shaanxi Province [2018TD030]
- Fundamental Research Funds for the Central Universities [GK201801001, GK202101005, GK201901002]
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Porous RhCu nanoboxes were successfully prepared and showed excellent electrocatalytic performance toward the EGOR, with higher mass activity and better long-term stability compared to commercial Rh nanocrystals. Theoretical calculations demonstrated that RhCu nanoboxes have lower CO adsorption energy and reaction barrier, resulting in outstanding electrocatalytic performance toward the EGOR.
The efficient electrocatalysts toward the ethylene glycol oxidation reaction (EGOR) are highly desirable for direct ethylene glycol fuel cells because of the sluggish kinetics of anodic EGOR. Herein, porous RhCu nanoboxes are successfully prepared through facile galvanic replacement reaction and succedent sodium borohydride reduction strategy. Benefiting from hierarchical pore structure, RhCu nanoboxes display excellent electrocatalytic performance toward the EGOR in alkaline medium with a mass activity of 775.1 A g(Rh)(-1), which is 2.8 times as large as that of commercial Rh nanocrystals. Moreover, the long-term stability of RhCu nanoboxes is better than that of commercial Rh nanocrystals. Furthermore, the theoretical calculations demonstrate that RhCu nanoboxes possess lower adsorption energy of CO and lower reaction barrier (0.27 eV) for the COads oxidation with aid of the adsorbed OHads species, resulting in the outstanding electrocatalytic performance toward the EGOR. This work provides a meaningful reference for developing highly effective electrocatalysts toward the EGOR.
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