Beyond the Rate-Determining Step in the Oxygen Evolution Reaction over a Single-Crystalline IrO2(110) Model Electrode: Kinetic Scaling Relations

ACS Catalysis ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 6755-6765 ◽  
Author(s):  
Kai S. Exner ◽  
Herbert Over
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Scaling Relations ◽  
Single Crystalline ◽  
Rate Determining Step ◽  
Kinetic Scaling

Synthesis of Cu–Ir nanocages with enhanced electrocatalytic activity for the oxygen evolution reaction

2015 ◽  
Vol 3 (39) ◽  
pp. 19669-19673 ◽  
Author(s):  
Chao Wang ◽  
Yongming Sui ◽  
Guanjun Xiao ◽  
Xinyi Yang ◽  
Yingjin Wei ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Catalytic Performance ◽  
Single Crystalline

Single-crystalline Cu1.11Ir nanocages were synthesized, which exhibited high catalytic performance toward the oxygen evolution reaction in 0.05 M H2SO4.

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.

Breaking the Scaling Relations of Oxygen Evolution Reaction on Amorphous NiFeP Nanostructures with Enhanced Activity for Overall Seawater Splitting

2021 ◽  
pp. 120862
Author(s):  
Jianyun Liu ◽  
Xuan Liu ◽  
Hao Shi ◽  
Jiahuan Luo ◽  
Liang Wang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Scaling Relations ◽  
Enhanced Activity

scholarly journals Enhanced oxygen evolution reaction by stacking single-crystalline freestanding SrRuO3

2021 ◽  
Author(s):  
Qixiang Wang ◽  
Huan Liu ◽  
Bin He ◽  
Ji Qi ◽  
Di Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
Transition Metal ◽  
Metal Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Transition Metal Oxide ◽  
Oxide Thin Film ◽  
Strain Condition ◽  
Single Crystalline ◽  
Metal Oxide Thin Film

Abstract Transition metal oxide thin film has recently become an attractive platform for enhanced catalytic activity and to perceive the fundamental functions of d electron structure and charge transfer processes. Owing to the long-range lattice ordering and accurate stoichiometry, the single-crystalline transition metal oxide thin film enables the mechanism discussion of electrochemistry down to the atomic level. However, it is technically unviable in the fabrication of transition metal oxide thin film with a substantial surface area and strain condition. Here we report the oxygen evolution reaction enhancement by a stack of multilayer SrRuO3 featured with single-crystallinity, flexibility, and stackability, which was achieved from the rigid heterostructure via a water-dissolution of Sr3Al2O6 sacrifice interlayers. The controllable stack of multilayer SrRuO3 and the emergent high-spin state t2g(3↑)eg(1↑) of Ru efficiently enhances the oxygen evolution reaction activity. Our study provides an approach for fine manipulation of single-crystalline freestanding transition metal oxide morphologically, and an efficient strategy aiming at the extreme enhancement of the electrochemically active surface area and strain condition.

Oxygen evolution reaction efficiently catalyzed by a quasi-single-crystalline cobalt fluoride

2020 ◽  
Vol 397 ◽  
pp. 125500 ◽  
Author(s):  
Zong Liu ◽  
Hui Liu ◽  
Xiaocong Gu ◽  
Ligang Feng
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Single Crystalline ◽  
Cobalt Fluoride

Cr‐Dopant Induced Breaking of Scaling Relations in CoFe Layered Double Hydroxides for Improvement of Oxygen Evolution Reaction

Small ◽  
2019 ◽  
Vol 15 (35) ◽  
pp. 1902373 ◽  
Author(s):  
Lulu Wen ◽  
Xilin Zhang ◽  
Jieyu Liu ◽  
Xinyang Li ◽  
Changchang Xing ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Layered Double Hydroxides ◽  
Oxygen Evolution Reaction ◽  
Scaling Relations ◽  
Double Hydroxides

Single-crystalline layered double hydroxides with rich defects and hierarchical structure by mild reduction for enhancing the oxygen evolution reaction

2019 ◽  
Vol 62 (10) ◽  
pp. 1365-1370 ◽  
Author(s):  
Peng Zhou ◽  
Junying He ◽  
Yuqin Zou ◽  
Yanyong Wang ◽  
Chao Xie ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Hierarchical Structure ◽  
Layered Double Hydroxides ◽  
Oxygen Evolution Reaction ◽  
Single Crystalline ◽  
Mild Reduction ◽  
Double Hydroxides

A New Type of Scaling Relations to Assess the Accuracy of Computational Predictions of Catalytic Activities Applied to the Oxygen Evolution Reaction

ChemCatChem ◽  
2017 ◽  
Vol 9 (7) ◽  
pp. 1261-1268 ◽  
Author(s):  
Ludovic G. V. Briquet ◽  
Misbah Sarwar ◽  
Jane Mugo ◽  
Glenn Jones ◽  
Federico Calle-Vallejo
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Scaling Relations ◽  
Catalytic Activities ◽  
New Type ◽  
Computational Predictions

Operando Stability Studies of Ultrathin Single-Crystalline IrO2(110) Films under Acidic Oxygen Evolution Reaction Conditions

ACS Catalysis ◽  
2021 ◽  
pp. 12651-12660
Author(s):  
Tim Weber ◽  
Vedran Vonk ◽  
Daniel Escalera-López ◽  
Giuseppe Abbondanza ◽  
Alfred Larsson ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Stability Studies ◽  
Reaction Conditions ◽  
Single Crystalline

scholarly journals A rational method to kinetically control the rate-determining step to explore efficient electrocatalysts for the oxygen evolution reaction

2018 ◽  
Vol 10 (7) ◽  
pp. 659-669 ◽  
Author(s):  
Nam Hee Kwon ◽  
Minho Kim ◽  
Xiaoyan Jin ◽  
Joohyun Lim ◽  
In Young Kim ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Rational Method ◽  
Rate Determining Step
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