Nanoporous metallic-glass electrocatalysts for highly efficient oxygen evolution reaction

Nanostructured Metallic Glass in a Highly Upgraded Energy State Contributing to Efficient Catalytic Performance

“…It is surprising that only the NGs form the nanoporous structure, which indicates that the different behavior is related to the heterogeneous microstructure with low-density (high-energy) interface region, as shown in Figure 2g and Figure S7 (Supporting Information). Generally, porous structures promote the close contact between the electrode, catalyst and electrolyte, which ensures the rapid transfer of charge and improve the current of the oxidation reaction, [7,65] thus reducing the overpotential in the UOR. Meanwhile, the porous structure increases the active surface area with high-energy and provides more active sites.…”

“…Recently, as part of the continuous exploration of the rapidly growing field of materials for energy applications, MGs have been reported to exhibit excellent catalytic performance due to their disordered structure. [5][6][7][8] For example, Ni-based MGs were reported as effective electrocatalysts used in water splitting because of their excellent performance in the oxygen evolution reaction (OER). [5][6][7] Fe-based MGs were reported to be particularly beneficial as advanced oxidation processes' catalysts in wastewater remediation.…”

“…[5][6][7][8] For example, Ni-based MGs were reported as effective electrocatalysts used in water splitting because of their excellent performance in the oxygen evolution reaction (OER). [5][6][7] Fe-based MGs were reported to be particularly beneficial as advanced oxidation processes' catalysts in wastewater remediation. [9,10] It is well established that the catalytic performance is closely related to the density of active sites.…”

Nanoflower electrocatalysts derived from mixed metal (Fe/Co/Ni) organic frameworks for the electrochemical oxygen evolution reaction

“…The decrease of the semicircle in the high frequency region proves that the charge transfer resistance ( R ct ) is reduced, and the charge transfer process of the OER becomes fast. 52 As shown in Fig. 5a, the semicircle of NiCoFe-MOF-2 is much smaller than that of other bimetal-based MOFs and commercial RuO 2 , which illustrates the small R ct of trimetal NiCoFe-MOF-2, which may benefit from its complete and thin nanoflower morphology.…”

Synthesis and electrochemical characterization of Si/TiO2/Au composite anode: Efficient oxygen evolution and hydroxyl radicals generation

“…Iridium oxide is usually preferred due to its higher stability and overpotential values lower than 400 mV at 10 mA cm −2 (as low as 200 mV) [42]. It is known that state-of-the-art non-noble metal materials for oxygen evolution reaction present high overpotential (about 330-500 mV) [43]. On the other hand, our novel composite anode has no parallels reported in the literature and could perform OER even below the standard oxygen evolution electrochemical potential when assisted by the bias voltage.…”