Journal
SMALL
Volume 16, Issue 46, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202003777
Keywords
3D micro‐ flowers; bifunctional electrocatalysis; NiFe layered double hydroxide; polyoxometalate; water splitting
Categories
Funding
- Shanghai Municipal Natural Science Foundation [17ZR1432200]
- Fundamental Research Funds for the Central Universities [22120200051]
- China Postdoctoral Science Foundation-funded project [0500229046]
Ask authors/readers for more resources
Rational design and preparation of efficient and durable bifunctional electrocatalyst is an eternal yet challenging goal for sustainable energy conversion processes, such as water splitting. Herein, 3D NiFe layered double hydroxide-polyoxometalate (LDH-POM; polyoxometalate, i.e., K-8[SiW11O39]center dot 13H(2)O) with micro-flower morphology is in situ grown on Ni foam via a facile one-step hydrothermal method, which can be used as a high-efficient bifunctional catalyst for overall water splitting. The as-prepared catalyst achieves overall water splitting current density of 10 mA cm(-2) at low overpotentials (oxygen evolution reaction (OER): approximate to 200 mV; hydrogen evolution reaction (HER): approximate to 156 mV) in 0.1 m KOH over a period of 20 h operation. Experimental investigation and density functional theory calculation indicate that, compared to pristine NiFe LDH, W6+ in NiFe LDH-POM can effectively minimize the adsorption energy barriers of *OH and therefore improve the kinetics of OER. This result may provide a promising strategy to synthesize 3D LDH micro-flowers by employing POM as a structure-direction agent for catalysis and energy applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available