Improving the stability and selectivity for the oxygen-evolution reaction on semiconducting WO3 photoelectrodes with a solid-state FeOOH catalyst

2016 ◽  
Vol 4 (8) ◽  
pp. 2960-2968 ◽  
Author(s):  
Charles R. Lhermitte ◽  
J. Garret Verwer ◽  
Bart M. Bartlett
Keyword(s):  
Solid State ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Sol Gel ◽  
Electrode Stability ◽  
The Stability

WO3 electrodes were synthesized via a sol–gel route followed by the photoelectrochemical deposition of a solid state FeOOH oxygen-evolution catalyst (OEC) to observe its effects on electrode stability and selectivity towards the oxygen evolution reaction (OER).

scholarly journals Correction: Improving the stability and selectivity for the oxygen-evolution reaction on semiconducting WO3 photoelectrodes with a solid-state FeOOH catalyst

2016 ◽  
Vol 4 (8) ◽  
pp. 3153-3153 ◽  
Author(s):  
Charles R. Lhermitte ◽  
J. Garret Verwer ◽  
Bart M. Bartlett
Keyword(s):  
Solid State ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
The Stability

Correction for ‘Improving the stability and selectivity for the oxygen-evolution reaction on semiconducting WO3 photoelectrodes with a solid-state FeOOH catalyst’ by Charles R. Lhermitte et al., J. Mater. Chem. A, 2016, DOI: 10.1039/c5ta04747a.

Interfacing RuO2 with Pt to induce efficient charge transfer from Pt to RuO2 for highly efficient and stable oxygen evolution under acidic media

2021 ◽  
Author(s):  
Taehyun Kwon ◽  
Heesu Yang ◽  
Minki Jun ◽  
Taekyung Kim ◽  
Jinwhan Joo ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Acidic Media ◽  
Highly Efficient ◽  
Efficient Charge ◽  
Stable Oxygen ◽  
The Stability

The oxygen evolution reaction (OER) requires a large overpotential which undermines the stability of electrocatalysts, typically IrOx or RuOx. RuOx is particularly vulnerable to high overpotential in acidic media, due...

scholarly journals Electrochemical Analysis of CuxCo3-xO4 Catalyst for Oxygen Evolution Reaction Prepared by Sol-Gel Method

2019 ◽  
Vol 29 (2) ◽  
pp. 92-96 ◽  
Author(s):  
Yoo Sei Park ◽  
Changwook Jung ◽  
Chiho Kim ◽  
Taewoo Koo ◽  
Changgyu Seok ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Sol Gel ◽  
Electrochemical Analysis ◽  
Gel Method ◽  
Sol Gel Method

Lattice Oxygen Redox Chemistry in Solid-State Electrocatalysts for Water Oxidation

2021 ◽  
Author(s):  
Ning Zhang ◽  
Yang Chai
Keyword(s):  
Solid State ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Water Electrolysis ◽  
Redox Chemistry ◽  
Lattice Oxygen ◽  
Vital Importance ◽  
Production Of Hydrogen ◽  
Overall Efficiency

Fundamental understandings towards oxygen evolution reaction (OER) are of vital importance as it dominates the overall efficiency of water electrolysis – a compelling technique for sustainable production of hydrogen feedstock....

scholarly journals Study of the Oxygen Evolution Reaction at Strontium Palladium Perovskite Electrocatalyst in Acidic Medium

2020 ◽  
Vol 21 (11) ◽  
pp. 3785 ◽  
Author(s):  
Areej A. Eskandrani ◽  
Shimaa M. Ali ◽  
Hibah M. Al-Otaibi
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Electrochemical Impedance ◽  
Sol Gel ◽  
Combustion Method ◽  
Catalyst Stability ◽  
Hydroxyl Groups ◽  
Calculated Activation Energy ◽  
Calculated Activation

The catalytic activity of Sr2PdO3, prepared through the sol-gel citrate-combustion method for the oxygen evolution reaction (OER) in a 0.1 M HClO4 solution, was investigated. The electrocatalytic activity of Sr2PdO3 toward OER was assessed via the anodic potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The glassy carbon modified Sr2PdO3 (GC/Sr2PdO3) electrode exhibited a higher electrocatalytic activity, by about 50 times, in comparison to the unmodified electrode. The order of the reaction was close to unity, which indicates that the adsorption of the hydroxyl groups is a fast step. The calculated activation energy was 21.6 kJ.mol−1, which can be considered a low value in evaluation with those of the reported OER electrocatalysts. The Sr2PdO3 perovskite portrayed a high catalyst stability without any probability of catalyst poisoning. These results encourage the use of Sr2PdO3 as a candidate electrocatalyst for water splitting reactions.

scholarly journals Covalently Bonded Ir(IV) on Conducted Blue TiO2 for Efficient Electrocatalytic Oxygen Evolution Reaction in Acid Media

Catalysts ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1176
Author(s):  
Chau T. K. Nguyen ◽  
Ngoc Quang Tran ◽  
Thi Anh Le ◽  
Hyoyoung Lee
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Acid Media ◽  
Covalent Bonds ◽  
Covalently Bonded ◽  
Tiny Amount ◽  
Primary Obstacle ◽  
Anode Electrode ◽  
Mass Activity ◽  
The Stability

The stability of anode electrode has been a primary obstacle for the oxygen evolution reaction (OER) in acid media. We design Ir-oxygen of hydroxyl-rich blue TiO2 through covalent bonds (Ir–O2–2Ti) and investigate the outcome of favored exposure of different amounts of covalent Ir–oxygen linked to the conductive blue TiO2 in the acidic OER. The Ir-oxygen-blue TiO2 nanoclusters show a strong synergy in terms of improved conductivity and tiny amount usage of Ir by using blue TiO2 supporter, and enhanced stability using covalent Ir-oxygen-linking (i.e., Ir oxide) in acid media, leading to high acidic OER performance with a current density of 10 mA cm−2 at an overpotential of 342 mV, which is much higher than that of IrO2 at 438 mV in 0.1 M HClO4 electrolyte. Notably, the Ir–O2–2Ti has a great mass activity of 1.38 A/mgIr at an overpotential 350 mV, which is almost 27 times higher than the mass activity of IrO2 at the same overpotential. Therefore, our work provides some insight into non-costly, highly enhanced, and stable electrocatalysts for the OER in acid media.

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.

Bifunctional oxygen electrocatalysis on ultra-thin Co9S8/MnS carbon nanosheets for all-solid-state zinc-air batteries

2021 ◽  
Author(s):  
Jiacheng Li ◽  
Wanqing Li ◽  
Hongwei Mi ◽  
Yongliang Li ◽  
Libo Deng ◽  
...  
Keyword(s):  
Energy Storage ◽  
Solid State ◽  
Oxygen Reduction Reaction ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Efficiency ◽  
Reduction Reaction ◽  
Energy Storage And Conversion ◽  
Carbon Nanosheets ◽  
Zinc Air Batteries

The development of high-efficiency and durable bifunctional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalysts as air cathodes is still a challenge in energy storage and conversion. In...

scholarly journals Spinel ferrite MFe2O4 (M = Ni, Co, or Cu) nanoparticles prepared by a proteic sol-gel route for oxygen evolution reaction

2021 ◽  
pp. 103391
Author(s):  
Luciena S. Ferreira ◽  
Thayse R. Silva ◽  
Vinícius D. Silva ◽  
Rafael A. Raimundo ◽  
Thiago A. Simões ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Spinel Ferrite ◽  
Sol Gel ◽  
Cu Nanoparticles

scholarly journals Electrochemical Synergies of Heterostructured Fe2O3-MnO Redox Couple for Oxygen Evolution Reaction in Alkaline Water Splitting

2019 ◽  
Author(s):  
Junyeong Kim ◽  
Jun Neoung Heo ◽  
Jeong Yeon Do ◽  
Rama Krishna Chava ◽  
Misook Kang
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Photoelectron Spectroscopy ◽  
Oxygen Evolution Reaction ◽  
Redox Reaction ◽  
Sol Gel ◽  
Alkaline Electrolyte ◽  
Ni Foam ◽  
X Ray ◽  
Electrolysis System

For efficient electrode development in an electrolysis system, Fe2O3, MnO, and heterojunction Fe2O3-MnO materials were synthesized via a simple sol-gel method. These particles were coated on a Ni-foam electrode, and the resulting material was used as an electrode to be used during an oxygen evolution reaction (OER). A 1000-cycle OER test in a KOH alkaline electrolyte indicated that the heterojunction Fe2O3-MnO/NF electrode exhibited the most stable and highest OER activity: it exhibited a low overvoltage (n) of 370 mV and a small Tafel slope of 66 mV/dec. X-ray photoelectron spectroscopy indicated that the excellent redox performance contributed to the synergy of Mn and Fe, which enhanced the OER performance of the Fe2O3-MnO/NF electrode. Furthermore, the effective redox reaction of Mn and Fe indicated that the structure maintained stability even under 1000 repeated OER cycles.

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