Promotion of the oxygen evolution performance of Ni-Fe layered hydroxides via the introduction of a proton-transfer mediator anionShow others and affiliations
2022 (English)In: Science in China Series B: Chemistry, ISSN 1674-7291, E-ISSN 1869-1870, Vol. 65, no 2, p. 382-390Article in journal (Refereed) Published
Abstract [en]
Developing efficient catalysts with high durability and activity for the oxygen evolution reaction (OER) is imperative for sustainable energy conversion technologies, including hydrogen generation and CO2 reduction, as well as other electrochemical energy storage systems. To this end, a comprehensive understanding of the mechanism for the water oxidation reaction is vital. Herein, a surfactant, nonafluoro-1-butanesulfonate (FBS), was introduced into Ni-Fe layered double hydroxide (NiFe-FBS/CFP) via electrochemical deposition on the surface of a carbon fiber paper (CFP) substrate. The as-prepared NiFe-FBS/CFP electrode exhibited excellent catalytic activities for OER compared to the Ni-Fe layered double hydroxide based electrode (NiFe-LDH/CFP), an excellent stability of 15 h, and an ultralow Tafel slope of 25.8 mV dec−1. Furthermore, by combining the results of pH-dependent kinetics investigations, chemical probing, proton inventory studies, and isotopic and atom-protontransfer measurements, it was observed that a proton-transfer process controls the reaction rates of both the NiFe-LDH and NiFe-FBS catalysts, and the residual sulfonate groups serve as proton transfer mediator to accelerate the proton transfer rate.[Figure not available: see fulltext.]
Place, publisher, year, edition, pages
Springer Nature , 2022. Vol. 65, no 2, p. 382-390
Keywords [en]
NiFe-LDH, proton transfer mediator, proton-coupled electron transfer, sulfonate group, water splitting, Carbon fibers, Catalysis, Catalyst activity, Electrochemical deposition, Electrodes, Energy conversion, Hydrogen production, Iron alloys, Iron compounds, Nickel compounds, Oxygen, Reaction rates, Redox reactions, Reduction, Carbon fiber paper, Layered hydroxides, Layered-double hydroxides, Oxygen evolution, Performance, Proton coupled electron transfers, Sulfonate groups, Binary alloys
National Category
Other Materials Engineering Atom and Molecular Physics and Optics Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-317508DOI: 10.1007/s11426-021-1178-yISI: 000734145500002Scopus ID: 2-s2.0-85121575723OAI: oai:DiVA.org:kth-317508DiVA, id: diva2:1696756
Note
QC 20220919
2022-09-192022-09-192022-09-19Bibliographically approved