Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 275, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119104
Keywords
Zn-air battery; Electrocatalytic; Co4N@N-doped carbon box; Density functional theory
Funding
- National Natural Science Foundation of China [11774188]
- Natural Science Foundation of Shandong Province [ZR2018QB003]
- Youth Innovation and Technology Support Plan of Shandong Province [2019KJA006]
- Incubation Program of University Preponderant Discipline of Shandong Province [03010304]
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The rational design of high-performance tri-functional electrocatalysts plays an important role for the fast development of Zn-air batteries (ZABs) and water splitting and still remains a great challenge up to date. Herein, Co4N nanoparticles encapsulated in nitrogen doped carbon (Co4N@NC) composite has been conveniently fabricated which shows excellent stability over 750 h at 5 mA cm(-2) and the voltage gap remain almost constant for long cycles. Flexible ZABs assembled based on this catalyst can be normally charged/discharged at any bent angles. Co4N@NC also can be used as HER catalyst to derive efficient splitting water under the ZABs which are assembled with Co4N@NC as ORR/OER catalyst. Density functional theory calculations reveal that N-doping in Co crystal could improve electronic conductivity, decrease the overpotential and accelerate reaction kinetics for OER/ORR. The above results indicate that Co4N@NC can be used as promising tri-functional high performance catalyst for Zn-air battery and overall water splitting.
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