Water splitting for yielding high-purity hydrogen represents
the
ultimate choice to reduce carbon dioxide emission owing to the superior
energy density and zero-pollution emission after combustion. However,
the high electricity consumption and requirement of large quantities
of pure water impede its large-scale application. Here, a triboelectric
nanogenerator (W-TENG) converting offshore wind energy into electricity
is proposed for commercial electric energy saving and cost reduction.
By introducing PTFE/POM dielectric pairs with matched HOMO/LUMO band
gap energy, a high charge density is achieved to promote the output
of W-TENG. With the impedance matching design of transformers with
the internal resistance of W-TENG, the output current is further enhanced
from 1.42 mA to 54.5 mA with a conversion efficiency of more than
92.0%. Furthermore, benefiting from the high electrocatalytic activity
(overpotential = 166 mV and Tafel slope = 181.2 mV dec–1) of a carbon paper supported NiCoP-MOF catalyst, natural seawater
can be adopted as a resource for in situ hydrogen production without
acid or alkaline additives. Therefore, the self-powered seawater electrolysis
system achieves a H2 production rate as high as 1273.9
μL min–1 m–2 with a conversion
efficiency of 78.9%, demonstrating a more practical strategy for conversion
of wind energy into renewable hydrogen energy.
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