Tubular Cu(OH)2 arrays decorated with nanothorny Co–Ni bimetallic carbonate hydroxide supported on Cu foam: a 3D hierarchical core–shell efficient electrocatalyst for the oxygen evolution reaction

2018 ◽  
Vol 6 (21) ◽  
pp. 10064-10073 ◽  
Author(s):  
Jiahui Kang ◽  
Jiali Sheng ◽  
Jinqi Xie ◽  
Huangqing Ye ◽  
Jiahui Chen ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Core Shell ◽  
Tafel Slope ◽  
Carbonate Hydroxide ◽  
Low Overpotential ◽  
Cu Foam

The hierarchical open-structured core–shell Cu(OH)2@CoNiCH NTs/CF achieves extraordinary OER performance with a low overpotential and low Tafel slope.

Enhanced oxygen evolution catalytic activity of NiS2 by coupling with ferrous phosphite and phosphide

2021 ◽  
Vol 5 (6) ◽  
pp. 1801-1808
Author(s):  
Jie Yu ◽  
Tao Zhang ◽  
Changchang Xing ◽  
Xuejiao Li ◽  
Xinyang Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Tafel Slope ◽  
Low Overpotential

NiS2/Fe-P nanospheres were developed as an efficient oxygen evolution reaction electrocatalyst with a low overpotential (218 mV @ 10 mA cm−2 and 306 mV @ 800 mA cm−2) and Tafel slope (47.5 mV dec−1).

Hierarchical micro/nanostructured C doped Co/Co3O4 hollow spheres derived from PS@Co(OH)2 for the oxygen evolution reaction

2017 ◽  
Vol 5 (22) ◽  
pp. 11163-11170 ◽  
Author(s):  
Lifeng Hang ◽  
Yiqiang Sun ◽  
Dandan Men ◽  
Shengwen Liu ◽  
Qian Zhao ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Hollow Spheres ◽  
Hollow Nanoparticles ◽  
Tafel Slope ◽  
Low Overpotential

C-Co/Co3O4 hollow nanoparticles with a low overpotential and Tafel slope.

Ion-biosorption induced core–shell Fe2P@carbon nanoparticles decorated on N, P co-doped carbon materials for the oxygen evolution reaction

2021 ◽  
Author(s):  
Min Jiang ◽  
Wei Fan ◽  
Anquan Zhu ◽  
Pengfei Tan ◽  
Jianping Xie ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Carbon Nanoparticles ◽  
Carbon Materials ◽  
Cost Effective ◽  
Core Shell ◽  
Co Doped

This work employs bacteria as precursors and induces a cost-effective biosorption strategy to obtain Fe2P@carbon nanoparticles decorated on N and P co-doped carbon (Fe2P@CNPs/NPC) materials.

Heterostructure of core-shell IrCo@IrCoOx as efficient and stable catalysts for oxygen evolution reaction

2021 ◽  
Author(s):  
Xiaoping Ma ◽  
Lili Deng ◽  
Manting Lu ◽  
Yi He ◽  
Shuai Zou ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Noble Metal ◽  
Oxygen Evolution Reaction ◽  
Proton Exchange Membrane ◽  
Precious Metals ◽  
Life Time ◽  
Proton Exchange ◽  
Core Shell ◽  
Large Current ◽  
Amorphous Metal Oxide

Abstract Although researches on non-noble metal electrocatalysts have been made some progress recently, their performance in proton exchange membrane water electrolyzer (PEMWE) is still incomparable to that of noble-metal-based catalysts. Therefore, it is a more practical way to improve the utilization of precious metals in electrocatalysts for oxygen evolution reaction (OER) in the acidic medium. Herein, nanostructured IrCo@IrCoOx core-shell electrocatalysts composed of IrCo alloy core and IrCoOx shell were synthesized through a simple colloidally synthesis and calcination method. As expected, the hybrid IrCo-200 NPs with petal-like morphology show the best OER activities in acidic electrolytes. They deliver lower overpotential and better electrocatalytic kinetics than pristine IrCo alloy and commercial Ir/C, reaching a low overpotential (j = 10 mA/cm2) of 259 mV (vs. RHE) and a Tafel slope of 59 mV dec−1. The IrCo-200 NPs displayed robust durability with life time of about 55 h in acidic solution under a large current density of 50 mA/cm2. The enhanced electrocatalytic activity may be associated with the unique metal/amorphous metal oxide core-shell heterostructure, allowing the improved charge transferability. Moreover, the *OH-rich amorphous shell functions as the active site for OER and prevents the further dissolution of the metallic core and thus ensures high stability.

Dynamic Active Site Evolution and Stabilization of Core-shell Structure Electrode for Oxygen Evolution Reaction

2022 ◽  
pp. 134672
Author(s):  
Chengyu Wei ◽  
Nannan Heng ◽  
Zuohui Wang ◽  
Xiaosheng Song ◽  
Zixu Sun ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Active Site ◽  
Oxygen Evolution Reaction ◽  
Shell Structure ◽  
Core Shell ◽  
Core Shell Structure

Dendritic core-shell Ni@Ni(Fe)OOH metal/metal oxyhydroxide electrode for efficient oxygen evolution reaction

2019 ◽  
Vol 469 ◽  
pp. 731-738 ◽  
Author(s):  
Jiaxin Wang ◽  
Wenchao Zhang ◽  
Zilong Zheng ◽  
Jingping Liu ◽  
Chunpei Yu ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Core Shell ◽  
Dendritic Core ◽  
Metal Metal

scholarly journals Facile Synthesis of Carbon Cloth Supported Cobalt Carbonate Hydroxide Hydrate Nanoarrays for Highly Efficient Oxygen Evolution Reaction

2021 ◽  
Vol 9 ◽  
Author(s):  
Yubing Yan
Keyword(s):  
Electron Microscopy ◽  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
Carbon Cloth ◽  
High Porosity ◽  
Cobalt Carbonate ◽  
Carbonate Hydroxide ◽  
Hydroxide Hydrate

Developing efficient and low-cost replacements for noble metals as electrocatalysts for the oxygen evolution reaction (OER) remain a great challenge. Herein, we report a needle-like cobalt carbonate hydroxide hydrate (Co(CO3)0.5OH·0.11H2O) nanoarrays, which in situ grown on the surface of carbon cloth through a facile one-step hydrothermal method. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations demonstrate that the Co(CO3)0.5OH nanoarrays with high porosity is composed of numerous one-dimensional (1D) nanoneedles. Owing to unique needle-like array structure and abundant exposed active sites, the Co(CO3)0.5OH@CC only requires 317 mV of overpotential to reach a current density of 10 mA cm−2, which is much lower than those of Co(OH)2@CC (378 mV), CoCO3@CC (465 mV) and RuO2@CC (380 mV). For the stability, there is no significant attenuation of current density after continuous operation 27 h. This work paves a facile way to the design and construction of electrocatalysts for the OER.

Autologous growth of Fe-doped Ni(OH)2 nanosheets with low overpotential for oxygen evolution reaction

2020 ◽  
Vol 45 (11) ◽  
pp. 6416-6424 ◽  
Author(s):  
Peican Wang ◽  
Yuqun Lin ◽  
Lei Wan ◽  
Baoguo Wang
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Low Overpotential
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