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Title: Direct visualization of hydrogen absorption dynamics in individual palladium nanoparticles

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms14020· OSTI ID:1347444
 [1];  [1];  [2];  [1];  [1];  [3]
  1. Stanford Univ., Stanford, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); DIFFER - Dutch Institute for Fundamental Energy Research, Eindhoven (The Netherlands)
  3. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

Many energy storage materials undergo large volume changes during charging and discharging. The resulting stresses often lead to defect formation in the bulk, but less so in nanosized systems. Here, we capture in real time the mechanism of one such transformation—the hydrogenation of single-crystalline palladium nanocubes from 15 to 80 nm—to better understand the reason for this durability. First, using environmental scanning transmission electron microscopy, we monitor the hydrogen absorption process in real time with 3 nm resolution. Then, using dark-field imaging, we structurally examine the reaction intermediates with 1 nm resolution. The reaction proceeds through nucleation and growth of the new phase in corners of the nanocubes. As the hydrogenated phase propagates across the particles, portions of the lattice misorient by 1.5%, diminishing crystal quality. Once transformed, all the particles explored return to a pristine state. As a result, the nanoparticles’ ability to remove crystallographic imperfections renders them more durable than their bulk counterparts.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1347444
Journal Information:
Nature Communications, Vol. 8; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 89 works
Citation information provided by
Web of Science

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Hydrogen-induced plasticity in nanoporous palladium journal January 2018
Atomic-scale selectivity of hydrogen for storage sites in Pd nanoparticles at atmospheric pressure journal January 2019
Grain boundary mediated hydriding phase transformations in individual polycrystalline metal nanoparticles journal October 2017
Realization of an H 2 /CO dual-gas sensor using CoPd magnetic structures journal October 2018
Two-dimensional lithium diffusion behavior and probable hybrid phase transformation kinetics in olivine lithium iron phosphate journal October 2017
Driving energetically-unfavorable dehydrogenation dynamics with plasmonics text January 2020
A unified framework for heat and mass transport at the atomic scale journal March 2018
Phase-field model for diffusion-induced grain boundary migration: An application to battery electrodes journal June 2019
The self-healing of defects induced by the hydriding phase transformation in palladium nanoparticles journal November 2017
Deposition and morphological evolution of nanostructured palladium during potential cycling: a liquid-cell TEM study journal January 2019
Facets and vertices regulate hydrogen uptake and release in palladium nanocrystals journal March 2019
The cycling stability of the in situ formed Mg-based nanocomposite catalyzed by YH 2 journal January 2017