Environmental concerns demand efficient removal of CO2, a major greenhouse gas. For this purpose, a traditional chemical strategy implements a catalytic conversion of CO2 to CO, with H2O as the sacrificial agent to generate O2. Herein we report the first self-photocatalytic conversion of CO2 to generate CO and O2 in the absence of H2O, using co-cationic perovskite nanocrystal Cs0.55FA0.45PbBr3. We

Band gap tunability of lead mixed halide perovskites makes them promising candidates for various applications in optoelectronics. Here we use the localization landscape theory to reveal that the static disorder due to iodide:bromide compositional alloying contributes at most 3 meV to the Urbach energy. Our modeling reveals that the reason for this small contribution is due to the small effective masses

Room-temperature Ca deposition/stripping is impeded by the formation of ionic insulating interfaces. Electrolyte optimization could partially enhance Ca reversibility by tailoring the interfaces, but the precise regulation of the composition remains challenging. Herein, we construct an ex situ artificial layer on Ca metal via a facile displacement reaction between metal halides and Ca. These Ca-driven

The global transition from fossil to renewable energy sources calls for a transformative change of our society’s energy landscape. On the positive side, electricity from photovoltaics and wind turbines is already today becoming economically competitive with electricity generated from fossil sources. Since the energy output from renewable sources is electrical, everything that can be electrified should

The electrochemical reduction of CO2 (CO2RR) on silver catalysts has been demonstrated under elevated current density, longer reaction times, and intermittent operation. Maintaining performance requires that CO2 can access the entire geometric catalyst area, thus maximizing catalyst utilization. Here we probe the time-dependent factors impacting geometric catalyst utilization for CO2RR in a zero-gap

Hydrogen peroxide (H2O2) is a powerful oxidant with many applications, but its chemical production is unsustainable and unsafe. Decentralized electrosynthesis of H2O2 via the selective two-electron oxygen reduction reaction (2e– ORR) is attractive, which demands active, selective, stable, and cost-effective electrocatalysts in acidic and neutral solutions where H2O2 is stable. Metal compounds are an

Micro light-emitting diodes (μ-LEDs) coupled to color conversion phosphors are among the most promising technologies for future display and artificial light sources. However, current emitters suffer from excessively large particle sizes, preventing micron-scale processability, and/or low stability that hampers the device lifetime. Here, we demonstrate down-conversion μ-LED phosphors based on CsPbBr3

Figure 1. (a) Emission spectra of sunlight, 3000 K CFL, and white 5000 K LED. (b) S-Q efficiency limit curves under the illumination of AM 1.5G sunlight and several indoor lights. (c) Performance (PCE and Voc) summary of perovskite IPVs in comparison with other IPV technologies. (b) is adapted with permission from ref (4). Copyright 2020 Royal Society of Chemistry. Figure 2. (a) Jsc of PIPVs under

Molecular catalysts can promote ammonia oxidation, providing mechanistic insights into the electrochemical N2 cycle for a carbon-free fuel economy. We report the ammonia oxidation activity of carbon anodes functionalized with the oligomer {[RuII(bda-κ-N2O2)(4,4′-bpy)]10(4,4′-bpy)}, Rubda-10, where bda is [2,2′-bipyridine]-6,6′-dicarboxylate and 4,4′-bpy is 4,4′-bipyridine. Electrocatalytic studies

The emergence of on-skin electronics with functions in human–machine interfaces and on-body sensing calls for the development of smart flexible batteries with high performance. Electrochromic energy-storage devices provide a visual indication of the capacity through a real-time change in color without any additional power supply. In this study, dual-function battery and supercapacitor devices for skin-interfaced

Solid electrolytes are revolutionizing the field of lithium–metal batteries; however, their practical implementation has been impeded by the interfacial instability between lithium metal electrodes and solid electrolytes. While various interlayers have been suggested to address this issue in recent years, long-term stability with repeated lithium deposition/stripping has been challenging to attain

Racing to critical milestones is a favorite pastime of historical explorers and scientist. From the race to be the first to the North Pole to the discovery of the Haber–Bosch process, overcoming seemingly impossible goals often comes through persistent teams exploring creative solutions, while at the same time paying close attention to past failures. The race to develop electrochemical routes for ammonia

Materials characterization is fundamental to our understanding of lithium ion battery electrodes and their performance limitations. Advances in laboratory-based characterization techniques have yielded powerful insights into the structure–function relationship of electrodes, yet there is still far to go. Further improvements rely, in part, on gaining a deeper understanding of complex physical heterogeneities

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Non-negligible K, acetate (OAc–), and nitrate (NO3–) impurities have been identified in commercially available PbI2 reagents, plausibly remnant from synthesis. Here, we characterize the individual impact of each of these impurities on the relative rate of the methylammonium (MA) condensation reaction with formamidinium (FA) to release N-methylformamidinium (MFA), a main degradation pathway of mixed-cation

Transparent radiative coolers can be used as window materials to reduce cooling energy needs for buildings and automobiles, which may contribute significantly to addressing climate change challenges. However, it is difficult to achieve high visible transparency and radiative cooling performance simultaneously. Here, we design a visually transparent radiative cooler on the basis of layered photonic

MnySb1–yOx powders with a series of compositions were evaluated as catalysts for chemical water oxidation in aqueous perchloric, sulfuric, or methanesulfonic acid. O2(g) evolved spontaneously over MnySb1–yOx catalyst powders that had been suspended in solutions that were pre-loaded with Ce4+ ions. The rate of O2 evolution depended on the amount, as well as the oxidation state, of the Mn in the powder