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Carbon Quantum Dot/NiFe Layered Double-Hydroxide Composite as a Highly Efficient Electrocatalyst for Water Oxidation

2014; American Chemical Society; Volume: 6; Issue: 10 Linguagem: Inglês

10.1021/am501256x

1944-8252

Di Tang, Juan Liu, Xuanyu Wu, Ruihua Liu, Xiao Han, Yuzhi Han, Hui Huang, Yang Liu, Zhenhui Kang,

Advanced battery technologies research

The design of highly efficient, durable, and earth-abundant catalysts for the oxygen evolution reaction is crucial to a variety of important energy conversion and storage processes. Here, we use carbon quantum dots (CQDs, ∼5 nm) to form hybrids with the ultrathin nickel-iron layered double-hydroxide (NiFe-LDH) nanoplates. The resulting CQD/NiFe-LDH complex exhibits high electrocatalytic activity (with an overpotential of ∼235 mV in 1 M KOH at a current density of 10 mA cm(-2)) and stability for oxygen evolution, which almost exceed the values of all previously reported Ni-Fe compounds and were comparable to those of the most active perovskite-based catalyst.