Molybdenum and Niobium Codoped B-Site-Ordered Double Perovskite Catalyst for Efficient Oxygen Evolution Reaction

2018 ◽  
Vol 10 (20) ◽  
pp. 16939-16942 ◽  
Author(s):  
Hainan Sun ◽  
Gao Chen ◽  
Jaka Sunarso ◽  
Jie Dai ◽  
Wei Zhou ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Double Perovskite ◽  
Perovskite Catalyst

Ordering and Phase Control in Epitaxial Double-Perovskite Catalysts for the Oxygen Evolution Reaction

ACS Catalysis ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. 7029-7037 ◽  
Author(s):  
Felix Gunkel ◽  
Lei Jin ◽  
David N. Mueller ◽  
Clemens Hausner ◽  
Daniel S. Bick ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Double Perovskite ◽  
Phase Control ◽  
Perovskite Catalysts

scholarly journals Improving the Activity for Oxygen Evolution Reaction by Tailoring Oxygen Defects in Double Perovskite Oxides

2019 ◽  
Vol 29 (34) ◽  
pp. 1901783 ◽  
Author(s):  
Yunmin Zhu ◽  
Lei Zhang ◽  
Bote Zhao ◽  
Huijun Chen ◽  
Xi Liu ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Double Perovskite ◽  
Perovskite Oxides ◽  
Oxygen Defects

Smart Control of Composition for Double Perovskite Electrocatalysts toward Enhanced Oxygen Evolution Reaction

ChemSusChem ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 5111-5116 ◽  
Author(s):  
Hainan Sun ◽  
Xiaomin Xu ◽  
Gao Chen ◽  
Yupeng Zhou ◽  
Hong‐Ji Lin ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Double Perovskite ◽  
Smart Control

scholarly journals Fe-Doping in Double Perovskite PrBaCo2(1-x)Fe2xO6-δ: Insights into Structural and Electronic Effects to Enhance Oxygen Evolution Catalyst Stability

Catalysts ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 263 ◽  
Author(s):  
Bae-Jung Kim ◽  
Emiliana Fabbri ◽  
Ivano Castelli ◽  
Mario Borlaf ◽  
Thomas Graule ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Double Perovskite ◽  
Alkaline Media ◽  
Catalyst Stability ◽  
Electronic Effects ◽  
Single Transition ◽  
Charge Stability ◽  
X Ray Absorption

Perovskite oxides have been gaining attention for its capability to be designed as an ideal electrocatalyst for oxygen evolution reaction (OER). Among promising candidates, the layered double perovskite—PrBaCo2O6-δ (PBC)—has been identified as the most active perovskite electrocatalyst for OER in alkaline media. For a single transition metal oxide catalyst, the addition of Fe enhances its electrocatalytic performance towards OER. To understand the role of Fe, herein, Fe is incorporated in PBC in different ratios, which yielded PrBaCo2(1-x)Fe2xCo6-δ (x = 0, 0.2 and 0.5). Fe-doped PBCF’s demonstrate enhanced OER activities and stabilities. Operando X-ray absorption spectroscopy (XAS) revealed that Co is more stable in a lower oxidation state upon Fe incorporation by establishing charge stability. Hence, the degradation of Co is inhibited such that the perovskite structure is prolonged under the OER conditions, which allows it to serve as a platform for the oxy(hydroxide) layer formation. Overall, our findings underline synergetic effects of incorporating Fe into Co-based layered double perovskite in achieving a higher activity and stability during oxygen evolution reaction.

scholarly journals Highly active Bifunctional Lamo3 (M=Cr, Mn, Fe, Co, Ni) Perovskites for Oxygen Reduction and Oxygen Evolution Reaction in Alkaline Media

2020 ◽  
Author(s):  
Areeba Hameed ◽  
Khulood Logade ◽  
Naba Ali ◽  
Priya Ghosh ◽  
Sadiya Shafath ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Energy ◽  
Literature Survey ◽  
Experimental Results ◽  
Alkaline Media ◽  
Reaction Intermediates ◽  
Perovskite Catalyst ◽  
Rate Determining Step

Lanthanum based electrocatalytically active perovskites, LaMO3 (M=Cr, Mn, Fe, Co, Ni), were synthesized using a single step solution combustion synthesis technique. The perovskites showed exceptional performance for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline medium. Based on the experimental results and literature survey, it is suggested that the exceptional activity of Mn and Co based lanthanum perovskite catalyst could be due to the optimum stabilization of reaction intermediates involved in the rate-determining step (RDS) of ORR/OER. According to crystal field theory (CFT), the d-orbital of transition metals are affected by the octahedral arrangement of six negative charges around it. The d orbital degenerates by splitting into two high energy (eg) and three lower energy orbitals (t2g) while maintaining the same average energy level. The rate-determining step in the ORR/OER reaction that based on the eg orbital filling of B site transition metal cations If the d-electrons are less, the valence state goes up and lowering the eg orbital filling that results in strong adsorption of oxygenated species on the B site (strong B-OH bond). This strong bonding limits the overall reaction rate by the slow desorption of OH and its derivatives during ORR/OER. Similarly, too high eg filling causes weak adsorption of oxygenated species that limits the reaction through the slow adsorption of reactants. Therefore, to enhance the activity of ORR/OER reaction it is required to balance the adsorption and desorption of the reactants and the intermediate respectively. The better way is to optimize the eg orbital filling to be nearly 1 (eg = 1).Based on the experimental results and literature survey, it is suggested that the exceptional activity of Mn and Co based lanthanum perovskite catalyst could be due to the optimum stabilization of reaction intermediates involved in the rate-determining step (RDS) of ORR and OER.

Ultrahigh-performance tungsten-doped perovskites for the oxygen evolution reaction

2018 ◽  
Vol 6 (21) ◽  
pp. 9854-9859 ◽  
Author(s):  
Gao Chen ◽  
Zhiwei Hu ◽  
Yanping Zhu ◽  
Zhi-Gang Chen ◽  
Yijun Zhong ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Double Perovskite ◽  
Highly Efficient ◽  
Materials Genome

Based on the materials genome strategy, a novel B-site cation ordered double perovskite SrCo0.4Fe0.2W0.4O3−δ has been designed as a highly efficient OER catalyst.

scholarly journals Cover Feature: Smart Control of Composition for Double Perovskite Electrocatalysts toward Enhanced Oxygen Evolution Reaction (ChemSusChem 23/2019)

ChemSusChem ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 5061-5061
Author(s):  
Hainan Sun ◽  
Xiaomin Xu ◽  
Gao Chen ◽  
Yupeng Zhou ◽  
Hong‐Ji Lin ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Double Perovskite ◽  
Smart Control

Oxygen defect engineering in double perovskite oxides for effective water oxidation

2020 ◽  
Vol 8 (21) ◽  
pp. 10957-10965 ◽  
Author(s):  
Yunmin Zhu ◽  
Xiao Zhong ◽  
Shiguang Jin ◽  
Haijun Chen ◽  
Zuyun He ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Oxygen Vacancies ◽  
Double Perovskite ◽  
Perovskite Oxides ◽  
Oxygen Defect ◽  
Defect Engineering ◽  
Effective Water

Generating oxygen vacancies in PrBa0.5Sr0.5Co1.5Fe0.5O5+δvia plasma treatment for strongly boosted oxygen evolution reaction activity.

Sign in / Sign up

Export Citation Format

Share Document