scholarly journals Functional Role of Fe-Doping in Co-Based Perovskite Oxide Catalysts for Oxygen Evolution Reaction

2019 ◽  
Vol 141 (13) ◽  
pp. 5231-5240 ◽  
Author(s):  
Bae-Jung Kim ◽  
Emiliana Fabbri ◽  
Daniel F. Abbott ◽  
Xi Cheng ◽  
Adam H. Clark ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Functional Role ◽  
Oxide Catalysts ◽  
Perovskite Oxide ◽  
Fe Doping

Functional Role of Fe, Cu-Doping in Ni-Based Perovskite Electrocatalysts for Oxygen Evolution Reaction

NANO ◽  
2020 ◽  
Vol 15 (06) ◽  
pp. 2050077
Author(s):  
Bingxue Hou ◽  
Cheng Cheng Wang ◽  
Rui Tang ◽  
Qi Zhang ◽  
Zanxiong Tan ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Functional Role ◽  
Sol Gel ◽  
Water Electrolysis ◽  
Cu Doping ◽  
Onset Potential ◽  
Potential Alternative ◽  
Perovskite Type

Water electrolysis is of vital importance to store renewable energy and the development of efficient, inexpensive and stable electrocatalysts for oxygen evolution reaction (OER) is essential, which requires much more understanding of the structural and the element classification. Here, a series of [Formula: see text]Fex[Formula: see text][Formula: see text] perovskites have been assessed as potential noble-metal-free OER electrocatalysts prepared by sol–gel method. Moreover, the functional role of Cu and Fe amount on the B-site of perovskites for OER electrocatalytic performance was evaluated. [Formula: see text][Formula: see text][Formula: see text] materials exhibited the highest intrinsic activities in 0.1[Formula: see text]M KOH for OER with an onset potential of 1.56[Formula: see text]V, a Tafel slope of 76[Formula: see text]mV[Formula: see text][Formula: see text], slightly lower than that of benchmark perovskite-type electrocatalyst [Formula: see text][Formula: see text]C[Formula: see text][Formula: see text]O3 (BSCF). The above results demonstrate that Cu element in the B-site of perovskites had little effect on the OER performance, and [Formula: see text][Formula: see text][Formula: see text] is a potential alternative electrocatalyst for OER application.

Dual Role of Deep Eutectic Solvent as a Solvent and Template for the Synthesis of Octahedral Cobalt Vanadate for an Oxygen Evolution Reaction

2018 ◽  
Vol 6 (12) ◽  
pp. 16255-16266 ◽  
Author(s):  
Gaurav M. Thorat ◽  
Harsharaj S. Jadhav ◽  
Animesh Roy ◽  
Wook-Jin Chung ◽  
Jeong Gil Seo
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Deep Eutectic Solvent ◽  
Dual Role

Ultrathin amorphous cobalt–vanadium hydr(oxy)oxide catalysts for the oxygen evolution reaction

2018 ◽  
Vol 11 (7) ◽  
pp. 1736-1741 ◽  
Author(s):  
Juzhe Liu ◽  
Yongfei Ji ◽  
Jianwei Nai ◽  
Xiaogang Niu ◽  
Yi Luo ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Oxide Catalysts ◽  
Simple Strategy

A simple strategy to synthesize ultrathin, amorphous and alloyed structural cobalt–vanadium hydr(oxy)oxide catalysts with enhanced water oxidation catalytic activity.

The role of selenium vacancies in the enhancement of electrocatalytic activity of CoNiSe2 for the oxygen evolution reaction

2021 ◽  
Vol 514 ◽  
pp. 230596
Author(s):  
Abdelhadi El Jaouhari ◽  
Amine Slassi ◽  
Bowen Zhang ◽  
Anton Pershin ◽  
Wei Liu ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity

Stabilizing role of Mo in TiO2-MoOx supported Ir catalyst toward oxygen evolution reaction

2021 ◽  
Vol 280 ◽  
pp. 119433 ◽  
Author(s):  
Eom-Ji Kim ◽  
Jaewook Shin ◽  
Junu Bak ◽  
Sang Jae Lee ◽  
Ki hyun Kim ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction

The Role of Surface States in the Oxygen Evolution Reaction on Hematite

2014 ◽  
Vol 126 (49) ◽  
pp. 13622-13626 ◽  
Author(s):  
Beniamino Iandolo ◽  
Anders Hellman
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Surface States

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.

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