Fine-tuning of the water oxidation performance of hierarchical Co3O4 nanostructures prepared from different cobalt precursors

2021 ◽  
Author(s):  
Pradnya Bodhankar ◽  
Avani Chunduri ◽  
Nainesh Patel ◽  
Dattatray Sadashiv Dhawale ◽  
Ajayan Vinu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Water Oxidation ◽  
Low Cost ◽  
Fine Tuning ◽  
Oxidation Performance ◽  
Co3o4 Nanostructures

Design of efficient and low-cost catalyst for water oxidation, which can outperform the electrochemical performance is of great importance. Herein, we report on fine-tuning of water oxidation performance using solvothermal...

Three-dimensional flexible electrode derived from low-cost nickel–phytate with improved electrochemical performance

2016 ◽  
Vol 4 (24) ◽  
pp. 9486-9495 ◽  
Author(s):  
Panpan Li ◽  
Zhaoyu Jin ◽  
Rui Wang ◽  
Yong Jin ◽  
Dan Xiao
Keyword(s):  
Electrochemical Performance ◽  
Water Oxidation ◽  
Low Cost ◽  
Three Dimensional ◽  
Flexible Electrode ◽  
Green Approach

A three-dimensional flexible electrode derived from nickel–phytate nanoplates was fabricatedviaa green approach, and showed outstanding performance in both water oxidation and supercapacitance.

A Simple, Rapid and Scalable Synthesis Approach for Ultra-Small Size Transition Metal Selenides with Efficient Water Oxidation Performance

2021 ◽  
Author(s):  
Yue Shi ◽  
Dan Zhang ◽  
Hongfu Miao ◽  
Wen Zhang ◽  
XueKe Wu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Low Cost ◽  
Oxidation Performance ◽  
Scalable Synthesis ◽  
Metal Selenides ◽  
Synthesis Approach

Transition metal-based nanomaterials are regarded as promising catalysts due to low cost and abundant reserves. In particular, transition metal-based selenide exhibit excellent capability for oxygen evolution reaction (OER). However, the...

Fine-Tuning Pulse Reverse Electrodeposition for Enhanced Photoelectrochemical Water Oxidation Performance of α-Fe2O3Photoanodes

2015 ◽  
Vol 119 (10) ◽  
pp. 5281-5292 ◽  
Author(s):  
Pravin S. Shinde ◽  
Alagappan Annamalai ◽  
Jae Young Kim ◽  
Sun Hee Choi ◽  
Jae Sung Lee ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Fine Tuning ◽  
Oxidation Performance ◽  
Pulse Reverse ◽  
Photoelectrochemical Water Oxidation

Controllable growth of graphdiyne layered nanosheets for high-performance water oxidation

2021 ◽  
Author(s):  
Shuya Zhao ◽  
Yurui Xue ◽  
Zhongqiang Wang ◽  
Zhiqiang Zheng ◽  
Xiaoyu Luan ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
High Performance ◽  
Low Cost ◽  
Highly Active ◽  
Controllable Growth

Developing highly active, stable and low-cost electrocatalysts capable of an efficient oxygen evolution reaction (OER) is urgent and challenging.

scholarly journals Shape Effects of Ceria Nanoparticles on the Water‒Gas Shift Performance of CuOx/CeO2 Catalysts

Catalysts ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 753
Author(s):  
Maria Lykaki ◽  
Sofia Stefa ◽  
Sónia A. C. Carabineiro ◽  
Miguel A. Soria ◽  
Luís M. Madeira ◽  
...  
Keyword(s):  
Low Cost ◽  
Catalytic Performance ◽  
Fine Tuning ◽  
Water Gas Shift ◽  
Oxygen Species ◽  
Ceria Nanoparticles ◽  
Ceo2 Sample ◽  
Equilibrium Conversion ◽  
Shape Effects ◽  
Water Gas

The copper–ceria (CuOx/CeO2) system has been extensively investigated in several catalytic processes, given its distinctive properties and considerable low cost compared to noble metal-based catalysts. The fine-tuning of key parameters, e.g., the particle size and shape of individual counterparts, can significantly affect the physicochemical properties and subsequently the catalytic performance of the binary oxide. To this end, the present work focuses on the morphology effects of ceria nanoparticles, i.e., nanopolyhedra (P), nanocubes (C), and nanorods (R), on the water–gas shift (WGS) performance of CuOx/CeO2 catalysts. Various characterization techniques were employed to unveil the effect of shape on the structural, redox and surface properties. According to the acquired results, the support morphology affects to a different extent the reducibility and mobility of oxygen species, following the trend: R > P > C. This consequently influences copper–ceria interactions and the stabilization of partially reduced copper species (Cu+) through the Cu2+/Cu+ and Ce4+/Ce3+ redox cycles. Regarding the WGS performance, bare ceria supports exhibit no activity, while the addition of copper to the different ceria nanostructures alters significantly this behaviour. The CuOx/CeO2 sample of rod-like morphology demonstrates the best catalytic activity and stability, approaching the thermodynamic equilibrium conversion at 350 °C. The greater abundance in loosely bound oxygen species, oxygen vacancies and highly dispersed Cu+ species can be mainly accounted for its superior catalytic performance.

scholarly journals Improvement of long-term cycling performance of high-nickel cathode materials by ZnO coating

2021 ◽  
Vol 10 (1) ◽  
pp. 210-220
Author(s):  
Fangfang Wang ◽  
Ruoyu Hong ◽  
Xuesong Lu ◽  
Huiyong Liu ◽  
Yuan Zhu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Solid Phase ◽  
Low Cost ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Side Reaction ◽  
Chemical Route ◽  
High Nickel

Abstract The high-nickel cathode material of LiNi0.8Co0.15Al0.05O2 (LNCA) has a prospective application for lithium-ion batteries due to the high capacity and low cost. However, the side reaction between the electrolyte and the electrode seriously affects the cycling stability of lithium-ion batteries. In this work, Ni2+ preoxidation and the optimization of calcination temperature were carried out to reduce the cation mixing of LNCA, and solid-phase Al-doping improved the uniformity of element distribution and the orderliness of the layered structure. In addition, the surface of LNCA was homogeneously modified with ZnO coating by a facile wet-chemical route. Compared to the pristine LNCA, the optimized ZnO-coated LNCA showed excellent electrochemical performance with the first discharge-specific capacity of 187.5 mA h g−1, and the capacity retention of 91.3% at 0.2C after 100 cycles. The experiment demonstrated that the improved electrochemical performance of ZnO-coated LNCA is assigned to the surface coating of ZnO which protects LNCA from being corroded by the electrolyte during cycling.

Electrochemical Reconstruction of Zn0.3Co2.7(PO4)2·4H2O for Enhanced Water Oxidation Performance

2020 ◽  
Vol 3 (12) ◽  
pp. 12088-12098
Author(s):  
Rahul Kumar ◽  
Harish Reddy Inta ◽  
Heramba V S R M Koppisetti ◽  
Sagar Ganguli ◽  
Sourav Ghosh ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Oxidation Performance
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