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Nanoscale structural oscillations in perovskite oxides induced by oxygen evolution

Journal Article · · Nature Materials
DOI:https://doi.org/10.1038/nmat4764· OSTI ID:1349577
 [1];  [1];  [2];  [3];  [3];  [4]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Materials Science and Engineering
  2. Ecole Polytechnique Federale Lausanne (Switzlerland). Inst. of Materials
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Materials Science and Engineering; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Mechanical Engineering
Understanding the interaction between water and oxides is critical for many technological applications, including energy storage, surface wetting/self-cleaning, photocatalysis and sensors. In this paper, we report observations of strong structural oscillations of Ba0.5Sr0.5Co0.8Fe0.2O3$$-$$δ (BSCF) in the presence of both H2O vapour and electron irradiation using environmental transmission electron microscopy. These oscillations are related to the formation and collapse of gaseous bubbles. Electron energy-loss spectroscopy provides direct evidence of O2 formation in these bubbles due to the incorporation of H2O into BSCF. SrCoO3$$-$$δ was found to exhibit small oscillations, while none were observed for La0.5Sr0.5CoO3$$-$$δ and LaCoO3. The structural oscillations of BSCF can be attributed to the fact that its oxygen 2p-band centre is close to the Fermi level, which leads to a low energy penalty for oxygen vacancy formation, high ion mobility, and high water uptake. This work provides surprising insights into the interaction between water and oxides under electron-beam irradiation.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0012704
OSTI ID:
1349577
Report Number(s):
BNL--113716-2017-JA; KC0403020
Journal Information:
Nature Materials, Journal Name: Nature Materials Journal Issue: 1 Vol. 16; ISSN 1476-1122
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (23)

Recent Advances in Oxygen Electrocatalysts Based on Perovskite Oxides journal August 2019
Enhanced Electrocatalytic Oxygen Evolution Activity by Tuning Both the Oxygen Vacancy and Orbital Occupancy of B‐Site Metal Cation in NdNiO 3 journal June 2019
Perovskite Hollow Fibers with Precisely Controlled Cation Stoichiometry via One-Step Thermal Processing journal March 2017
Mastering Surface Reconstruction of Metastable Spinel Oxides for Better Water Oxidation journal January 2019
Ultrathin Two-Dimensional Nanostructured Materials for Highly Efficient Water Oxidation journal June 2017
Flame-Engraved Nickel-Iron Layered Double Hydroxide Nanosheets for Boosting Oxygen Evolution Reactivity journal May 2018
Perovskite Materials in Electrocatalysis book January 2020
Engineering operando methodology: Understanding catalysis in time and space journal September 2018
Recent advances in ABO3 perovskites: their gas-sensing performance as resistive-type gas sensors journal December 2019
Electrochemical Behavior of Carbon Electrodes for In Situ Redox Studies in a Transmission Electron Microscope journal October 2019
Dynamic surface self-reconstruction is the key of highly active perovskite nano-electrocatalysts for water splitting journal July 2017
Chemical and structural origin of lattice oxygen oxidation in Co–Zn oxyhydroxide oxygen evolution electrocatalysts journal March 2019
Unified structural motifs of the catalytically active state of Co(oxyhydr)oxides during the electrochemical oxygen evolution reaction journal September 2018
Controlling cation segregation in perovskite-based electrodes for high electro-catalytic activity and durability journal January 2017
Frontiers of water oxidation: the quest for true catalysts journal January 2017
Enhanced photoelectrochemical water splitting of hematite multilayer nanowire photoanodes by tuning the surface state via bottom-up interfacial engineering journal January 2017
A prototype reactor for highly selective solar-driven CO 2 reduction to synthesis gas using nanosized earth-abundant catalysts and silicon photovoltaics journal January 2017
A crystalline and 3D periodically ordered mesoporous quaternary semiconductor for photocatalytic hydrogen generation journal January 2018
Activating basal plane in NiFe layered double hydroxide by Mn 2+ doping for efficient and durable oxygen evolution reaction journal January 2018
Enhanced charge separation and transport efficiency induced by vertical slices on the surface of carbon nitride for visible-light-driven hydrogen evolution journal January 2019
Redox inactive ion meliorated BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3−δ perovskite oxides as efficient electrocatalysts for the oxygen evolution reaction journal January 2018
Understanding interactions between halide perovskite surfaces and atmospheric/VOC gas molecules: an ab initio investigation journal July 2018
Factors Controlling the Redox Activity of Oxygen in Perovskites: From Theory to Application for Catalytic Reactions journal May 2017

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