Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 3, Pages 3919-3929Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c17283
Keywords
0D-2D nanohybrid; metal-organic framework; oxygen evolution reaction; oxygen reduction reaction; overall water splitting; zinc-air battery
Funding
- US National Science Foundation (NSF) Nanotechnology-Enabled Water Treatment Center [NEWT ERC435 1449500]
- USDA [2019-38422-30214]
- Ralph & Kathleen Ponce de Leon Professorship
- Qatar National Research Fund (a member of the Qatar Foundation) [NPRP10-0125-170252]
- King Saud University, Riyadh, Saudi Arabia [RSP-2021/30]
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This study reports a synthetic strategy using metal-organic frameworks (MOFs) to fabricate low-dimensional nanohybrids and demonstrates their excellent performance in oxygen reduction/oxygen evolution electrocatalysis.
The design of alternative earth-abundant van der Waals (vdW) nanoheterostructures for bifunctional oxygen evolution/reduction (OER/ORR) electrocatalysis is of paramount importance to fabricate energy-related devices. Herein, we report a simple metal-organic framework (MOF)-derived synthetic strategy to fabricate low-dimensional (LD) nanohybrids formed by zero-dimensional (0D) ZrO2 nanoparticles (NPs) and heteroatom-doped two-dimensional (2D) carbon nanostructures. The 2D platforms controlled the electronic structures of interfacial Zr atoms, thus producing optimized electron polarization for boron and nitrogen-doped carbon (BCN)/ZrO2 nanohybrids. X-ray photoelectron spectroscopy (XPS) and theoretical studies revealed the key role of the synergistic couple effect of boron (B) and nitrogen (N) in interfacial electronic polarization. The BCN/ZrO2 nanohybrid showed excellent bifunctional electrocatalytic activity, delivering an overpotential (eta(10)) of 301 mV to reach a current density of 10 mA-cm(-2) for the OER process and a half-wave potential (E-1/2) of 0.85 V vs reversible hydrogen electrode (RHE) for the ORR process, which are comparable to the state-of-the-art LD nanohybrids. Furthermore, BCN/ZrO2 also showed competitive performances for water-splitting and zinc-air battery devices. This work establishes a new route to fabricate highly efficient multifunctional electrocatalysts by tuning the electronic polarization properties of 0D-2D electrochemical interfaces.
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