التفاصيل البيبلوغرافية
| العنوان: |
Engineering the Coordination Environment of Single Cobalt Atoms for Efficient Oxygen Reduction and Hydrogen Evolution Reactions |
| المؤلفون: |
Tao Sun (91038), Wenjie Zang (5697866), Huan Yan (445452), Jing Li (10611), Zhiqi Zhang (814650), Yongfeng Bu (1642795), Wei Chen (23863), John Wang (271394), Jiong Lu (72875), Chenliang Su (1662055) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Biochemistry, Biotechnology, Evolutionary Biology, Ecology, Computational Biology, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, energy conversion efficiency, Hydrogen Evolution Reactions, SAC, optimized electron density, Co-S 2 N 2 site, Co-S 2 N 2 sites exhibit, hydrogen evolution reaction, optimized Co 1, oxygen reduction reaction, coordination environment, Co-S 2 N 2 sites, 0.99 V vs RHE, Co 1, Single Cobalt Atoms, HER, ORR, Efficient Oxygen Reduction |
| الوصف: |
The coordination environment of single-atom catalysts (SACs) plays a crucial role in determining the energy conversion efficiency of related electrochemical devices. Herein, the coordination environment of a series of Co-based SACs (Co 1 -SACs) was tuned to correlate the chemical structures of these catalysts with their electrocatalytic performance. The optimized Co 1 -SACs containing Co-S 2 N 2 sites are electrocatalytically active in both the oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER), which were carried out in alkaline media. The Co 1 -SACs containing Co-S 2 N 2 sites exhibit high ORR activity, with an onset potential of 0.99 V vs RHE and good stability, as well as have promising application in a zinc-oxygen battery with a high power density (260 mW cm –2 ) and open-circuit voltage (1.50 V), remarkable tolerance to large current density, and long-term operation. The ORR of the Co-S 2 N 2 site is attributed to the optimized electron density of the Co atom through its cocoordination with adjacent S and N atoms. Moreover, the Co 1 -SACs efficiently catalyze the HER, exhibiting a low overpotential (121 mV at 20 mA cm –2 ), a low Tafel slope (47 mV dec –1 ), and long-term stability. This work also provides a facile heteroatom-doping strategy to engineer the desired coordination environments in SACs for efficient electrocatalysis. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Engineering_the_Coordination_Environment_of_Single_Cobalt_Atoms_for_Efficient_Oxygen_Reduction_and_Hydrogen_Evolution_Reactions/14333438 |
| DOI: |
10.1021/acscatal.0c05577.s001 |
| الاتاحة: |
https://doi.org/10.1021/acscatal.0c05577.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.A92172E8 |
| قاعدة البيانات: |
BASE |