Cs₃Bi₂I₉ nanodiscs with phase and Bi(iii) state stability under reductive potential or illumination for H₂ generation from diluted aqueous HI

Abstract

The increasingly popular, lead-free perovskite, Cs3Bi2I9 has a vulnerable Bi3+ state under reductive potentials, due to the high standard reduction potential of Bi3+/Bi+ (0 < δ < 3). Contrary to...

Photocatalytic Anaerobic Dehydrogenation of Alcohols over Metal Halide Perovskites: A New Acid-Free Scheme for H2 Production

“…18−20 These attractive features enable a broad range of photovoltaic and optoelectronic applications of these materials toward solar energy conversion. 21,22 In photocatalysis, since the first embodiment of the MAPbI 3 perovskite for photocatalytic H 2 evolution from HI solution in 2016, diverse types of MHP-based hybrid composites 15,18,23−29 such as Cs 2 SnI 6 /single-atom Pt, 26 Cs 3 Bi 2x Sb 2−2x I 9 , 27 2D-Cs 3 Bi 2 X 9 , 28 and Cs 3 Bi 2 I 9 nanodiscs 29 have been developed, which significantly promotes the catalytic performance and durability. Nevertheless, it is notable that nearly all of the photocatalytic H 2 evolution reactions (HERs) using maps are carried out in saturated hydrogen halide (HX) solution.…”

“…In photocatalysis, since the first embodiment of the MAPbI 3 perovskite for photocatalytic H 2 evolution from HI solution in 2016, diverse types of MHP-based hybrid composites ,,− such as Cs 2 SnI 6 /single-atom Pt, Cs 3 Bi 2 x Sb 2–2 x I 9 , 2D-Cs 3 Bi 2 X 9 , and Cs 3 Bi 2 I 9 nanodiscs have been developed, which significantly promotes the catalytic performance and durability. Nevertheless, it is notable that nearly all of the photocatalytic H 2 evolution reactions (HERs) using maps are carried out in saturated hydrogen halide (HX) solution. , Although such an approach mitigates the instability issue of MHPs in humid conditions by the establishment of a dynamic dissolution–precipitation equilibrium, the harsh acid reaction condition inevitably poses severe practical drawbacks and limits the overall sustainability. , Moreover, the oxidative products such as triiodide (I 3 – ions) in the electrolyte are dark-colored, which will compete with the active perovskite for solar photons. ,, Therefore, the continuous removal of the I 3 – ions from the solution to maintain activity is crucial.…”

Covalent Linking of the Porphyrin Light Harvester to the Multiwalled-Carbon-Nanotube-Based Polypyridineruthenium(II) Complex for Boosting the Electrocatalytic Oxygen Evolution Reaction

“…The ECSA can be calculated according to the formula ECSA = C dl / C s , where C s is reported to be ca. 40 μF cm –1 . , …”

“…40 μF cm −1 . 2,42 The overpotential (η) was calculated at a current density of 10 mA cm −2 according to the following formula: η (V) = E − 1. 23.…”

Recent developments in lead-free bismuth-based halide perovskite nanomaterials for heterogeneous photocatalysis under visible light

“…130 Given the advantages of a high light absorption coefficient, tunable band structures, versatile surface chemical environment and good stability, BHP nanomaterials can serve as promising heterogeneous photocatalysts with visible-light response for various significant reactions. In recent years, several BHP nanomaterials have been applied for diverse photocatalytic reactions under visible light, including H 2 generation, 88,103,131 CO 2 reduction, 42,104,132 organic synthesis, 49,87,133 pollutant degradation 134 and photoinduced polymerization. 135,136…”