2 research outputs found
Additional file 1: of Relationship between high platelet reactivity on clopidogrel and long-term clinical outcomes after drug-eluting stents implantation (PAINT-DES): a prospective, propensity score-matched cohort study
Figure S1. Flowchart of study design. PCI: percutaneous coronary intervention; MAR: maximal aggregation ratio; ADP: adenosine diphosphate. (TIFF 110 kb
Photoprompted Hot Electrons from Bulk Cross-Linked Graphene Materials and Their Efficient Catalysis for Atmospheric Ammonia Synthesis
Ammonia
synthesis is the single most important chemical process
in industry and has used the successful heterogeneous Haber–Bosch
catalyst for over 100 years and requires processing under both high
temperature (300–500 °C) and pressure (200–300
atm); thus, it has huge energy costs accounting for about 1–3%
of human’s energy consumption. Therefore, there has been a
long and vigorous exploration to find a milder alternative process.
Here, we demonstrate that by using an iron- and graphene-based catalyst,
Fe@3DGraphene, hot (ejected) electrons from this composite catalyst
induced by visible light in a wide range of wavelength up to red could
efficiently facilitate the activation of N<sub>2</sub> and generate
ammonia with H<sub>2</sub> directly at ambient pressure using light
(including simulated sun light) illumination directly. No external
voltage or electrochemical or any other agent is needed. The production
rate increases with increasing light frequency under the same power
and with increasing power under the same frequency. The mechanism
is confirmed by the detection of the intermediate N<sub>2</sub>H<sub>4</sub> and also with a measured apparent activation energy only
∼1/4 of the iron based Haber–Bosch catalyst. Combined
with the morphology control using alumina as the structural promoter,
the catalyst retains its activity in a 50 h test