Abstract
We prepared a two-dimensional ZIF-L-derived high-performance ORR catalyst using a mesoporous silica coating strategy. By one-step pyrolysis of mSiO2@L composite, the Pt precursors adsorbed inside ZIF-L are reduced to ultra-small Pt nanoparticles, and the SiO2 template inhibits agglomeration and collapse of ZIF-L during pyrolysis. After the template is removed, the obtained Pt/SLC exhibits outstanding activity for ORR. The half-wave potential of Pt/SLC is 0.910 V vs. RHE, which far exceeds commercial Pt/C catalyst (0.895 V vs. RHE).
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