ORCID Profile
0000-0003-4496-0057
Current Organisation
Hong Kong University of Science and Technology
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Publisher: American Chemical Society (ACS)
Date: 19-06-2019
Abstract: When the geometric features of plasmonic nanostructures approach the subnanometric regime, nonlocal screening and charge spill-out of metallic electrons will strongly modify the optical responses of the structures. While quantum tunneling resulting from charge spill-out has been widely discussed in the literature, the near-field enhancement saturation caused by the nonlocal screening effect still lacks a direct experimental verification. In this work, we use surface-enhanced Raman spectroscopy (SERS) of graphene to probe the in-plane near-field enhancement limit in gold nanosphere-on-film nanocavities where different layers of graphene are sandwiched between a gold nanosphere and a gold film. Together with advanced transmission electron microscopy cross-sectional imaging and nonlocal hydrodynamic theoretical calculations, the cavity gap width correlated SERS and dark-field scattering measurements reveal that the intrinsic nonlocal dielectric response of gold limits the near-field enhancement factors and mitigates the plasmon resonance red-shift with decreasing the gap width to less than one nanometer. Our results not only verify previous theoretical predictions in both the near-field and far-field regime but also demonstrate the feasibility of controlling the near- and far-field optical response in such versatile plasmonic particle-graphene-on-film nanocavities, which can find great potential in applications of graphene-based photonic devices in the visible and near-infrared region.
Publisher: American Chemical Society (ACS)
Date: 27-06-2018
Abstract: Highly efficient and low-cost nonprecious metal electrocatalysts that favor a four-electron pathway for the oxygen reduction reaction (ORR) are essential for high-performance metal-air batteries. Herein, we show an ultrasonication-assisted synthesis method to prepare Mn
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1EE00878A
Abstract: Sustainable production of H 2 O 2 is boosted by oxygen reduction reaction on Co–N 5 sites in a flow cell in simulated seawater.
Publisher: American Chemical Society (ACS)
Date: 28-01-2021
DOI: 10.1021/JACS.0C13178
Publisher: American Chemical Society (ACS)
Date: 21-12-2021
DOI: 10.1021/JACS.1C11313
Publisher: American Chemical Society (ACS)
Date: 05-10-2022
Publisher: American Chemical Society (ACS)
Date: 25-10-2022
DOI: 10.1021/JACS.2C08305
Abstract: The poor durability of Pt-based nanoparticles dispersed on carbon black is the challenge for the application of long-life polymer electrolyte fuel cells. Recent work suggests that Fe- and N-codoped carbon (Fe-N-C) might be a better support than conventional high-surface-area carbon. In this work, we find that the electrochemical surface area retention of Pt/Fe-N-C is much better than that of commercial Pt/C during potential cycling in both acidic and basic media.
Publisher: Springer Science and Business Media LLC
Date: 02-06-2022
Publisher: American Chemical Society (ACS)
Date: 22-06-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8NR10025J
Abstract: Freestanding nitrogen-doped graphene fiber webs prepared by wet-spinning for multi-battery charge storage in both LOBs and LSBs.
Publisher: Wiley
Date: 07-07-2023
Abstract: The conventional industrial production of nitrogen‐containing fertilizers, such as urea and ammonia, relies heavily on energy‐intensive processes, accounting for approximately 3 % of global annual CO 2 emissions. Herein, we report a sustainable electrocatalytic approach that realizes direct and selective synthesis of urea and ammonia from co‐reduction of CO 2 and nitrates under ambient conditions. With the assistance of a copper (Cu)‐based salphen organic catalyst, outstanding urea (3.64 mg h −1 mg cat −1 ) and ammonia (9.73 mg h −1 mg cat −1 ) yield rates are achieved, in addition to a remarkable Faradaic efficiency of 57.9±3 % for the former. This work proposes an appealing sustainable route to converting greenhouse gas and waste nitrates by renewable energies into value‐added fertilizers.
Publisher: Wiley
Date: 28-10-2009
Publisher: Wiley
Date: 07-07-2023
Abstract: The conventional industrial production of nitrogen‐containing fertilizers, such as urea and ammonia, relies heavily on energy‐intensive processes, accounting for approximately 3 % of global annual CO 2 emissions. Herein, we report a sustainable electrocatalytic approach that realizes direct and selective synthesis of urea and ammonia from co‐reduction of CO 2 and nitrates under ambient conditions. With the assistance of a copper (Cu)‐based salphen organic catalyst, outstanding urea (3.64 mg h −1 mg cat −1 ) and ammonia (9.73 mg h −1 mg cat −1 ) yield rates are achieved, in addition to a remarkable Faradaic efficiency of 57.9±3 % for the former. This work proposes an appealing sustainable route to converting greenhouse gas and waste nitrates by renewable energies into value‐added fertilizers.
Publisher: American Chemical Society (ACS)
Date: 22-02-2023
Publisher: American Chemical Society (ACS)
Date: 19-04-2021
No related grants have been discovered for Minhua Shao.