5 research outputs found
Plasma-liquid interactions: a review and roadmap
Plasma-liquid interactions represent a growing interdisciplinary area of research involving plasma science, fluid dynamics, heat and mass transfer, photolysis, multiphase chemistry and aerosol science. This review provides an assessment of the state-of-the-art of this multidisciplinary area and identifies the key research challenges. The developments in diagnostics, modeling and further extensions of cross section and reaction rate databases that are necessary to address these challenges are discussed. The review focusses on non-equilibrium plasmas
Varying Surface Chemistries for p‑Doped and n‑Doped Silicon Nanocrystals and Impact on Photovoltaic Devices
Doping of quantum confined nanocrystals
offers unique opportunities
to control the bandgap and the Fermi energy level. In this contribution,
boron-doped (p-doped) and phosphorus-doped (n-doped) quantum confined
silicon nanocrystals (SiNCs) are surface-engineered in ethanol by
an atmospheric pressure radio frequency microplasma. We reveal that
surface chemistries induced on the nanocrystals strongly depend on
the type of dopants and result in considerable diverse optoelectronic
properties (e.g., photoluminescence quantum yield is enhanced more
than 6 times for n-type SiNCs). Changes in the position of the SiNCs
Fermi levels are also studied and implications for photovoltaic application
are discussed
Flexible Bifunctional Electrode for Alkaline Water Splitting with Long-Term Stability
Progress in electrochemical
water-splitting devices as
future renewable
and clean energy systems requires the development of electrodes composed
of efficient and earth-abundant bifunctional electrocatalysts. This
study reveals a novel flexible and bifunctional electrode (NiO@CNTR) by hybridizing macroscopically assembled
carbon nanotube ribbons (CNTRs) and
atmospheric plasma-synthesized NiO quantum dots (QDs) with varied
loadings to demonstrate bifunctional electrocatalytic activity for
stable and efficient overall water-splitting (OWS) applications. Comparative
studies on the effect of different electrolytes, e.g., acid and alkaline,
reveal a strong preference for alkaline electrolytes for the developed NiO@CNTR electrode, suggesting its bifunctionality
for both HER and OER activities. Our proposed NiO@CNTR electrode demonstrates significantly enhanced overall catalytic
performance in a two-electrode alkaline electrolyzer cell configuration
by assembling the same electrode materials as both the anode and the
cathode, with a remarkable long-standing stability retaining ∼100%
of the initial current after a 100 h long OWS run, which is attributed
to the “synergistic coupling” between NiO QD catalysts
and the CNTR matrix. Interestingly, the developed electrode exhibits
a cell potential (E10) of only 1.81 V
with significantly low NiO QD loading (83 μg/cm2)
compared to other catalyst loading values reported in the literature.
This study demonstrates a potential class of carbon-based electrodes
with single-metal-based bifunctional catalysts that opens up a cost-effective
and large-scale pathway for further development of catalysts and their
loading engineering suitable for alkaline-based OWS applications and
green hydrogen generation
Flexible Bifunctional Electrode for Alkaline Water Splitting with Long-Term Stability
Progress in electrochemical
water-splitting devices as
future renewable
and clean energy systems requires the development of electrodes composed
of efficient and earth-abundant bifunctional electrocatalysts. This
study reveals a novel flexible and bifunctional electrode (NiO@CNTR) by hybridizing macroscopically assembled
carbon nanotube ribbons (CNTRs) and
atmospheric plasma-synthesized NiO quantum dots (QDs) with varied
loadings to demonstrate bifunctional electrocatalytic activity for
stable and efficient overall water-splitting (OWS) applications. Comparative
studies on the effect of different electrolytes, e.g., acid and alkaline,
reveal a strong preference for alkaline electrolytes for the developed NiO@CNTR electrode, suggesting its bifunctionality
for both HER and OER activities. Our proposed NiO@CNTR electrode demonstrates significantly enhanced overall catalytic
performance in a two-electrode alkaline electrolyzer cell configuration
by assembling the same electrode materials as both the anode and the
cathode, with a remarkable long-standing stability retaining ∼100%
of the initial current after a 100 h long OWS run, which is attributed
to the “synergistic coupling” between NiO QD catalysts
and the CNTR matrix. Interestingly, the developed electrode exhibits
a cell potential (E10) of only 1.81 V
with significantly low NiO QD loading (83 μg/cm2)
compared to other catalyst loading values reported in the literature.
This study demonstrates a potential class of carbon-based electrodes
with single-metal-based bifunctional catalysts that opens up a cost-effective
and large-scale pathway for further development of catalysts and their
loading engineering suitable for alkaline-based OWS applications and
green hydrogen generation
Flexible Bifunctional Electrode for Alkaline Water Splitting with Long-Term Stability
Progress in electrochemical
water-splitting devices as
future renewable
and clean energy systems requires the development of electrodes composed
of efficient and earth-abundant bifunctional electrocatalysts. This
study reveals a novel flexible and bifunctional electrode (NiO@CNTR) by hybridizing macroscopically assembled
carbon nanotube ribbons (CNTRs) and
atmospheric plasma-synthesized NiO quantum dots (QDs) with varied
loadings to demonstrate bifunctional electrocatalytic activity for
stable and efficient overall water-splitting (OWS) applications. Comparative
studies on the effect of different electrolytes, e.g., acid and alkaline,
reveal a strong preference for alkaline electrolytes for the developed NiO@CNTR electrode, suggesting its bifunctionality
for both HER and OER activities. Our proposed NiO@CNTR electrode demonstrates significantly enhanced overall catalytic
performance in a two-electrode alkaline electrolyzer cell configuration
by assembling the same electrode materials as both the anode and the
cathode, with a remarkable long-standing stability retaining ∼100%
of the initial current after a 100 h long OWS run, which is attributed
to the “synergistic coupling” between NiO QD catalysts
and the CNTR matrix. Interestingly, the developed electrode exhibits
a cell potential (E10) of only 1.81 V
with significantly low NiO QD loading (83 μg/cm2)
compared to other catalyst loading values reported in the literature.
This study demonstrates a potential class of carbon-based electrodes
with single-metal-based bifunctional catalysts that opens up a cost-effective
and large-scale pathway for further development of catalysts and their
loading engineering suitable for alkaline-based OWS applications and
green hydrogen generation