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Title: Xenon Trapping in Metal-Supported Silica Nanocages

Journal Article · · Small
 [1]; ORCiD logo [2];  [1];  [3];  [4]; ORCiD logo [4];  [1];  [4];  [4];  [4];  [5];  [6];  [5]; ORCiD logo [7]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); State Univ. of New York (SUNY), Stony Brook, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Delaware, Newark, DE (United States)
  3. State Univ. of New York (SUNY), Stony Brook, NY (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Universidad Nacional de San Luis (UNSL) (Argentina)
  6. Univ. of Pennsylvania, Philadelphia, PA (United States)
  7. Brookhaven National Lab. (BNL), Upton, NY (United States); State Univ. of New York (SUNY), Stony Brook, NY (United States); Univ. of Delaware, Newark, DE (United States)

Xenon (Xe) is a valuable and scarce noble gas used in various applications, including lighting, electronics, and anesthetics, among many others. It is also a volatile byproduct of the nuclear fission of uranium. In this work, a novel material architecture consisting of silicate nanocages in contact with a metal surface and an approach for trapping single Xe atoms in these cages is presented. The trapping is done at low Xe pressures and temperatures between 400 and 600 K, and the process is monitored in situ using synchrotron-based ambient pressure X-ray photoelectron spectroscopy. Release of the Xe from the cages occurs only when heating to temperatures above 750 K. A model that explains the experimental trapping kinetics is proposed and tested using Monte Carlo methods. Density functional theory calculations show activation energies for Xe exiting the cages consistent with experiments. This work can have significant implications in various fields, including Xe production, nuclear power, nuclear waste remediation, and nonproliferation of nuclear weapons. The results are also expected to apply to argon, krypton, and radon, opening an even more comprehensive range of applications.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
American Chemical Society (ACS); U.S. Department of Energy; USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001004; SC0012704
OSTI ID:
1827153
Report Number(s):
BNL--222186-2021-JAAM
Journal Information:
Small, Journal Name: Small Journal Issue: 39 Vol. 17; ISSN 1613-6810
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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