Structural evolution of CoMoO4 to CoOOH by ion electrochemical etching for boosting oxygen evolution reaction

2019 ◽  
Vol 442 ◽  
pp. 227252 ◽  
Author(s):  
Yao Zhang ◽  
Haoran Guo ◽  
Pengfei Yuan ◽  
Kanglei Pang ◽  
Baoxue Cao ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrochemical Etching ◽  
Structural Evolution

In situ structural evolution of a nickel boride catalyst: synergistic geometric and electronic optimization for the oxygen evolution reaction

2019 ◽  
Vol 7 (10) ◽  
pp. 5288-5294 ◽  
Author(s):  
Jihong Li ◽  
Hui Chen ◽  
Yipu Liu ◽  
Ruiqin Gao ◽  
Xiaoxin Zou
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Structural Evolution ◽  
Electronic Effects ◽  
Nickel Plate ◽  
Nickel Boride ◽  
Catalytic Stability ◽  
Activity Enhancement

A boronized nickel plate shows surface structural evolution and activity enhancement during the OER due to synergistic geometric and electronic effects, and shows good catalytic stability for over 1500 hours.

Structural Evolution of Metal (Oxy)hydroxide Nanosheets during the Oxygen Evolution Reaction

2018 ◽  
Vol 11 (6) ◽  
pp. 5590-5594 ◽  
Author(s):  
Christian Dette ◽  
Michael R. Hurst ◽  
Jiang Deng ◽  
Michael R. Nellist ◽  
Shannon W. Boettcher
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Structural Evolution

Electrochemical etching of α-cobalt hydroxide for improvement of oxygen evolution reaction

2016 ◽  
Vol 4 (24) ◽  
pp. 9578-9584 ◽  
Author(s):  
Peng Fei Liu ◽  
Shuang Yang ◽  
Li Rong Zheng ◽  
Bo Zhang ◽  
Hua Gui Yang
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrochemical Etching ◽  
Cobalt Hydroxide ◽  
Highly Active

Electrochemically etched α-Co(OH)2–Cl, due to the dechlorination-induced defective structures and in situ formation of CoOOH fragments, are highly active for OER.

scholarly journals Amorphization mechanism of SrIrO3 electrocatalyst: How oxygen redox initiates ionic diffusion and structural reorganization

2021 ◽  
Vol 7 (2) ◽  
pp. eabc7323
Author(s):  
Gang Wan ◽  
John W. Freeland ◽  
Jan Kloppenburg ◽  
Guido Petretto ◽  
Jocienne N. Nelson ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Crystalline Structure ◽  
Oxygen Evolution Reaction ◽  
Structural Evolution ◽  
Amorphous Layer ◽  
Ionic Diffusion ◽  
Renewable Electricity ◽  
Structural Reorganization ◽  
Disordered Structure ◽  
Square Planar

The use of renewable electricity to prepare materials and fuels from abundant molecules offers a tantalizing opportunity to address concerns over energy and materials sustainability. The oxygen evolution reaction (OER) is integral to nearly all material and fuel electrosyntheses. However, very little is known about the structural evolution of the OER electrocatalyst, especially the amorphous layer that forms from the crystalline structure. Here, we investigate the interfacial transformation of the SrIrO3 OER electrocatalyst. The SrIrO3 amorphization is initiated by the lattice oxygen redox, a step that allows Sr2+ to diffuse and O2− to reorganize the SrIrO3 structure. This activation turns SrIrO3 into a highly disordered Ir octahedral network with Ir square-planar motif. The final SryIrOx exhibits a greater degree of disorder than IrOx made from other processing methods. Our results demonstrate that the structural reorganization facilitated by coupled ionic diffusions is essential to the disordered structure of the SrIrO3 electrocatalyst.

A nanoporous oxygen evolution catalyst synthesized by selective electrochemical etching of perovskite hydroxide CoSn(OH)6nanocubes

2016 ◽  
Vol 9 (2) ◽  
pp. 473-477 ◽  
Author(s):  
Fang Song ◽  
Kurt Schenk ◽  
Xile Hu
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrochemical Etching ◽  
High Catalytic Activity

Large nanocubes of perovskite hydroxide CoSn(OH)6can be electrochemically etched to form hierarchical nanoporous CoOxwith high catalytic activity for oxygen evolution reaction.

Structural evolution from a fence-like to pillared-layer metal–organic framework for the stable oxygen evolution reaction

2020 ◽  
Vol 56 (56) ◽  
pp. 7722-7725 ◽  
Author(s):  
Qian Ren ◽  
Jin-Qi Wu ◽  
Jia-Wei Zhao ◽  
Cheng-Fei Li ◽  
Li Gong ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Oxygen Evolution ◽  
Chemical Stability ◽  
Oxygen Evolution Reaction ◽  
Metal Organic Framework ◽  
Structural Evolution ◽  
Metal Organic ◽  
Stable Oxygen ◽  
Porous Fence ◽  
Organic Framework

A porous fence-like MOF transforms into a dense pillared-layer coordination polymer, improving its chemical stability and exhibiting an excellent electrolytic OER performance.

An Fe-doped NiTe bulk crystal as a robust catalyst for the electrochemical oxygen evolution reaction

2019 ◽  
Vol 55 (63) ◽  
pp. 9347-9350 ◽  
Author(s):  
Lei Zhong ◽  
Yufei Bao ◽  
Xu Yu ◽  
Ligang Feng
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Bulk Crystal ◽  
Stable Performance ◽  
Electrochemical Oxygen

An Fe doped NiTe bulk crystal was demonstrated to exhibit an extremely active and stable performance for the electrochemical oxygen evolution reaction.

scholarly journals Robust Carbon-Stabilization of Few-Layer Black Phosphorus for Superior Oxygen Evolution Reaction

Coatings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 695 ◽  
Author(s):  
Mengjie Zhang ◽  
Wenchang Zhu ◽  
Xingzhe Yang ◽  
Meng Feng ◽  
Hongbin Feng
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Black Phosphorus ◽  
Carbon Stabilization ◽  
High Durability ◽  
Carbon Coated ◽  
Alkaline Conditions ◽  
Doped Graphene ◽  
A Current

Few-layer exfoliated black phosphorus (Ex-BP) has attracted tremendous attention owing to its promising applications, including in electrocatalysis. However, it remains a challenge to directly use few-layer Ex-BP as oxygen-involved electrocatalyst because it is quite difficult to restrain structural degradation caused by spontaneous oxidation and keep it stable. Here, a robust carbon-stabilization strategy has been implemented to prepare carbon-coated Ex-BP/N-doped graphene nanosheet (Ex-BP/NGS@C) nanostructures at room temperature, which exhibit superior oxygen evolution reaction (OER) activity under alkaline conditions. Specifically, the as-synthesized Ex-BP/NGS@C hybrid presents a low overpotential of 257 mV at a current density of 10 mA cm−2 with a small Tafel slope of 52 mV dec−1 and shows high durability after long-term testing.

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