Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 12, Issue 12, Pages 3246-3252Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.1c00150
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Funding
- Leader Researcher program of the Korean Ministry of Science, ICT and Planning (MSIP) [NRF-2018R1A3B1052042]
- MSIP [NRF-2019K1A3A7A09033395, NRF-NRF-2016K1A4A3914691]
- project CALIPSOplus under EU Framework Program for Research and Innovation HORIZON 2020 [730872]
- U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- US Department of Energy through the Los Alamos National Laboratory
- National Nuclear Security Administration [89233218CNA000001]
- Department of Energy, Laboratory Directed Research and Development program at Los Alamos National Laboratory [20190643DR]
- Department of Energy, Laboratory Directed Research and Development program at SLAC National Accelerator Laboratory [DE-AC02-76SF00515]
- Panofsky Fellowship at SLAC
- DOE Office of Fusion Energy Science [FWP100182]
- EPSRC [EP/P024513/1, EP/R02927X/1]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation Programme [670787, 864877]
- DFG [FOR 2440]
- I-SITE ULNE project MetalCore [R-ERCGEN-19-006-MERKEL]
- DOENNSA [DE-NA0003342]
- NSF [DMR-1701360]
- ARO [W911NF-17-1-0468]
- EPSRC [EP/R02927X/1, EP/P024513/1] Funding Source: UKRI
- European Research Council (ERC) [864877] Funding Source: European Research Council (ERC)
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The ultrafast synthesis of epsilon-Fe3N1+x from Fe and N-2 under high pressure using XFEL was observed, demonstrating the exploration of time-dependence of reactions under high-pressure conditions by coupling intense X-ray exposures with the source time structure.
The ultrafast synthesis of epsilon-Fe3N1+x in a diamond-anvil cell (DAC) from Fe and N-2 under pressure was observed using serial exposures of an X-ray free electron laser (XFEL). When the sample at 5 GPa was irradiated by a pulse train separated by 443 ns, the estimated sample temperature at the delay time was above 1400 K, confirmed by in situ transformation of alpha- to gamma-iron. Ultimately, the Fe and N-2 reacted uniformly throughout the beam path to form Fe3N1.33, as deduced from its established equation of state (EOS). We thus demonstrate that the activation energy provided by intense X-ray exposures in an XFEL can be coupled with the source time structure to enable exploration of the time-dependence of reactions under high-pressure conditions.
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