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Title: Role of Lattice Oxygen Participation in Understanding Trends in the Oxygen Evolution Reaction on Perovskites

Journal Article · · ACS Catalysis
ORCiD logo [1];  [1];  [2];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Mechanical Engineering
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Materials Science and Engineering

Here, this study demonstrates the importance of considering lattice oxygen participation in understanding trends in the oxygen evolution reaction (OER) on ABO3 (A = lanthanum or strontium, B = transition metal) perovskites. Using density functional theory, we show that the lattice oxygen mechanism (LOM) can lead to higher OER activity than the conventional adsorbate evolving mechanism (AEM) by minimizing the thermodynamically required overpotential. We also show that the OER activity volcano for AEM is universal for all perovskites, whereas that for LOM depends on the identity of the A cation in ABO3. This explains experimental observations that perovskites such as Pr0.5Ba0.5CoO3-$$δ$$ and SrCoO3-$$δ$$ show higher OER activities than the conventionally predicted optimum compounds such as LaNiO3 and SrCoO3. Furthermore, we show that LOM is preferred to AEM in achieving bifunctional catalysts capable of promoting both OER and ORR. Using our overall activity volcano, we finally suggest several candidate materials that are predicted to be highly active for OER via LOM.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE
OSTI ID:
1543700
Journal Information:
ACS Catalysis, Vol. 8, Issue 5; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 286 works
Citation information provided by
Web of Science

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Perovskite Materials in Electrocatalysis book January 2020
Fe-Doping in Double Perovskite PrBaCo2(1-x)Fe2xO6-δ: Insights into Structural and Electronic Effects to Enhance Oxygen Evolution Catalyst Stability journal March 2019
Enhanced Stability and Thickness‐Independent Oxygen Evolution Electrocatalysis of Heterostructured Anodes with Buried Epitaxial Bilayers journal June 2019
Mastering Surface Reconstruction of Metastable Spinel Oxides for Better Water Oxidation journal January 2019
The role of metastability in enhancing water-oxidation activity journal January 2019
Progress and Challenges Toward the Rational Design of Oxygen Electrocatalysts Based on a Descriptor Approach journal November 2019
Chemical and structural origin of lattice oxygen oxidation in Co–Zn oxyhydroxide oxygen evolution electrocatalysts journal March 2019
Intrinsic Effects of Ruddlesden‐Popper‐Based Bifunctional Catalysts for High‐Temperature Oxygen Reduction and Evolution journal June 2019
Vacancy diffusion barriers in TaON and Ta 3 N 5 water-splitting photocatalysts journal January 2019
Realizing Ultrafast Oxygen Evolution by Introducing Proton Acceptor into Perovskites journal April 2019
Highly Active Nanoperovskite Catalysts for Oxygen Evolution Reaction: Insights into Activity and Stability of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 2+δ and PrBaCo 2 O 5+δ journal September 2018
Fe-doping in double perovskite prbaco2(1-x)fe2xo6-б: Insights into structural and electronic effects to enhance oxygen evolution catalyst stability text January 2019
The role of metastability in enhancing water-oxidation activity text January 2019

Figures / Tables (5)