Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 38, Pages 42634-42643Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c07821
Keywords
carbon nanotubes; electrocatalysis; metal-organic frameworks; oxygen evolution reaction; oxygen plasma treatment
Funding
- Advanced Research Center for Green Materials Science and Technology from The Featured Area Research Center Program within Ministry of Education [109L9006]
- Ministry of Science and Technology in Taiwan [MOST 109-2634-F-002-042]
- Ministry of Science and Technology (MOST) of Taiwan [107-2218-E-002001, 108-2221-E-002-112-MY3, 108-3116-F-002-010CC2]
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To obtain renewable and clean fuels, exploration of effective electrocatalysts is highly desirable due to the sluggish kinetics of water splitting. In this study, the oxygen plasma-activated hybrid structure of Ni-Fe Prussian blue analogue (PBA) interconnected by carbon nanotubes (O-CNT/NiFe) is reported as a highly effective electrocatalytic material for the oxygen evolution reaction (OER). The electrocatalytic performance is significantly influenced by different mass ratios of CNTs to Ni-Fe PBA. Benefiting from the conductive and oxygen plasma-activated CNTs as well as ordered and distributed metal sites in the framework, the optimized O-CNT/NiFe 1:18 exhibits a competitive overpotential of 279 mV at a current density of 10 mA cm(-2) and a low Tafel slope of 42.8 mV dec(-1) in 1.0 M KOH. Furthermore, the composite shows superior durability for at least 100 h. These results suggest that the O-CNT/NiFe 1:18 possesses promising potential as a highly active electrocatalyst.
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