3 research outputs found
Interface Engineering of Anchored Ultrathin TiO<sub>2</sub>/MoS<sub>2</sub> Heterolayers for Highly-Efficient Electrochemical Hydrogen Production
An
efficient self-standing hydrogen evolution electrode was prepared
by in situ growth of stacked ultrathin TiO<sub>2</sub>/MoS<sub>2</sub> heterolayers on carbon paper (CP@TiO<sub>2</sub>@MoS<sub>2</sub>). Owing to the high overall conductivity, large electrochemical
surface area and abundant active sites, this novel electrode exhibits
an excellent performance for hydrogen evolution reaction (HER). Remarkably,
the composite electrode shows a low Tafel slope of 41.7 mV/dec, and
an ultrahigh cathodic current density of 550 mA/cm<sup>2</sup> at
a very low overpotential of 0.25 V. This work presents a new universal
strategy for the construction of effective, durable, scalable, and
inexpensive electrodes that can be extended to other electrocatalytic
systems
Interface Engineering of Anchored Ultrathin TiO<sub>2</sub>/MoS<sub>2</sub> Heterolayers for Highly-Efficient Electrochemical Hydrogen Production
An
efficient self-standing hydrogen evolution electrode was prepared
by in situ growth of stacked ultrathin TiO<sub>2</sub>/MoS<sub>2</sub> heterolayers on carbon paper (CP@TiO<sub>2</sub>@MoS<sub>2</sub>). Owing to the high overall conductivity, large electrochemical
surface area and abundant active sites, this novel electrode exhibits
an excellent performance for hydrogen evolution reaction (HER). Remarkably,
the composite electrode shows a low Tafel slope of 41.7 mV/dec, and
an ultrahigh cathodic current density of 550 mA/cm<sup>2</sup> at
a very low overpotential of 0.25 V. This work presents a new universal
strategy for the construction of effective, durable, scalable, and
inexpensive electrodes that can be extended to other electrocatalytic
systems
All-Inorganic Perovskite Solar Cells
The
research field on perovskite solar cells (PSCs) is seeing frequent
record breaking in the power conversion efficiency (PCE). However,
organic–inorganic hybrid halide perovskites and organic additives
in common hole-transport materials (HTMs) exhibit poor stability against
moisture and heat. Here we report the successful fabrication of all-inorganic
PSCs without any labile or expensive organic components. The entire
fabrication process can be operated in ambient environment without
humidity control (e.g., a glovebox). Even without encapsulation, the
all-inorganic PSCs present no performance degradation in humid air
(90–95% relative humidity, 25 °C) for over 3 months (2640
h) and can endure extreme temperatures (100 and −22 °C).
Moreover, by elimination of expensive HTMs and noble-metal electrodes,
the cost was significantly reduced. The highest PCE of the first-generation
all-inorganic PSCs reached 6.7%. This study opens the door for next-generation
PSCs with long-term stability under harsh conditions, making practical
application of PSCs a real possibility