Multiple effects driven by AC magnetic field for enhanced electrocatalytic oxygen evolution in alkaline electrolyte

Magnetic Enhancement of Oxygen Evolution in CoNi@C Nanosheets

“…It was found that there is a spin exchange between the magnetic metal ions and the oxygen intermediate, which leads to the fast kinetics of the OER. In addition, it was also found that ac magnetic field can promote the alkaline OER process at low current densities in NiCoFe-MOF-74 . These findings suggest a promising strategy to boost the catalytic activity of oxygen by electromagnetic induction and encourage more extensive research to understand the effect of spin polarization induced by magnetic field on oxygen evolution.…”

“…XRD patterns (a) of the CoNi@C samples; SEM image of CoNi@C-600 (b), CoNi@C-700 (c), CoNi@C-800 (d), and CoNi@C-900 (e); EDX pattern of CoNi@C-900 (f); TEM (g,h); HRTEM (i); and elemental mappings (j) of CoNi@C-900 magnetic field can promote the alkaline OER process at low current densities in NiCoFe-MOF-74. 28 These findings suggest a promising strategy to boost the catalytic activity of oxygen by electromagnetic induction and encourage more extensive research to understand the effect of spin polarization induced by magnetic field on oxygen evolution. Herein, we considered whether a thin N-doped carbon layer with high conductivity and well-confined magnetic nanoalloys can be used as a reasonable magnetic enhancement strategy for the OER.…”

Decoupling gaseous hydrogen production from liquid water using a magnetic‐photo‐thermal coupling reactor

“…The results showed that the density of induced charges at the interface of FePt–FeC heterojunction increased under AMF 32 . In another example, Zheng et al found an increased current density platform generated in electrolyte, due to the vortex electric field caused by the external AMF 33 …”

“…In our experiments, the sinusoidal AMF was generated by a sinusoidal alternating current when it passes through a coil, inducing a sinusoidal alternating vortex electric field in the metal conductor. After that, the free electrons in the metal conductor would move around the metal surface, that is, in the form of eddy current 33 . The eddy current is circularly distributed in metal conductor and becomes smaller from edge to center, which leads to the electric potential gradient between the edge and center in NF, as illustrated in Figure 6B.…”

“…32 In another example, Zheng et al found an increased current density platform generated in electrolyte, due to the vortex electric field caused by the external AMF. 33 To clarify the effect of the generated internal electric field on the photocatalytic performance, photoelectrocatalytic experiments were carried out under the AMF condition with or without solar light illumination. The experimental device is shown in Figure S9, which consists of electrochemical workstation with standard three-electrode system and a self-assembled AMF generator.…”