2d Single-Atom Rare-Earth Lanthanum as a Novel Bifunctional Electrocatalyst for Rechargeable Zinc-Air Batteries
Conventional graphene has poor electrocatalytic performance due to few active sites in it. To solve this problem, heteroatoms including metal and non-metal are generally introduced into graphene. Herein, nitrogen (N) is doped into the graphene oxide (GO) to obtain N-doped graphene oxide (NGO) in a facile way, and lanthanum (La) is introduced in the NGO to form single-atom 2D La@NGO. We analyze the properties of La@NGO series and find that 7%La@NGO shows the most excellent oxygen reduction reaction performances with a half-wave potential up to 0.84 V, outstanding stability and methanol tolerance in 0.1 M KOH, which are all superior to those of commercial Pt/C electrocatalyst. In addition, 7%La@NGO also shows good bifunctional electrocatalytic behaviors with a low ∆E of 0.76 V. The rechargeable zinc-air battery assembled by 7%La@NGO possesses a high power density of 80.9 mW cm -2 , a large specific capacity of 653 mAh g -1 , a high rechargeable efficiency of 55.2% and excellent cycling stability
Year of publication: |
[2022]
|
---|---|
Authors: | Yang, Zhou ; Xiang, Meng ; Wu, Zhonglian ; Fan, Wangxi ; Hui, Jia ; Yu, Chengbin ; Qin, Hengfei |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
Saved in favorites
Similar items by person
-
Ma, Zhongqing, (2012)
-
The Coupling Mechanism between FDI and employment structure : a case or Beijing
Liu, Liyan, (2020)
-
Ke, Xiaoling, (2018)
- More ...