Ultrathin Cobalt Oxide Interlayer Facilitated Hole Storage for Sustained Water Oxidation over Composited Tantalum Nitride Photoanodes

ACS Catalysis ◽  
2021 ◽  
pp. 12736-12744
Author(s):  
Pengpeng Wang ◽  
Ping Fu ◽  
Jiangping Ma ◽  
Yuying Gao ◽  
Zheng Li ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Water Oxidation ◽  
Tantalum Nitride

Electrochemical and photoelectrochemical water splitting with a CoOx catalyst prepared by flame assisted deposition

2020 ◽  
Vol 49 (3) ◽  
pp. 588-592 ◽  
Author(s):  
Fusheng Li ◽  
Ziqi Zhao ◽  
Hao Yang ◽  
Dinghua Zhou ◽  
Yilong Zhao ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Water Splitting ◽  
Water Oxidation ◽  
Oxide Catalyst ◽  
Photoelectrochemical Water Splitting ◽  
Deposition Method ◽  
Photoelectrochemical Water Oxidation

A cobalt oxide catalyst prepared by a flame-assisted deposition method on the surface of FTO and hematite for electrochemical and photoelectrochemical water oxidation, respectively.

scholarly journals In Situ EPR Characterization of a Cobalt Oxide Water Oxidation Catalyst at Neutral pH

Catalysts ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 926 ◽  
Author(s):  
Yury Kutin ◽  
Nicholas Cox ◽  
Wolfgang Lubitz ◽  
Alexander Schnegg ◽  
Olaf Rüdiger
Keyword(s):  
Cobalt Oxide ◽  
Water Oxidation ◽  
Large Scale ◽  
Low Cost ◽  
Operating Conditions ◽  
Oxidation Catalyst ◽  
O2 Evolution ◽  
Ligand Field ◽  
Neutral Ph

Here we report an in situ electron paramagnetic resonance (EPR) study of a low-cost, high-stability cobalt oxide electrodeposited material (Co-Pi) that oxidizes water at neutral pH and low over-potential, representing a promising system for future large-scale water splitting applications. Using CW X-band EPR we can follow the film formation from a Co(NO3)2 solution in phosphate buffer and quantify Co uptake into the catalytic film. As deposited, the film shows predominantly a Co(II) EPR signal, which converts into a Co(IV) signal as the electrode potential is increased. A purpose-built spectroelectrochemical cell allowed us to quantify the extent of Co(II) to Co(IV) conversion as a function of potential bias under operating conditions. Consistent with its role as an intermediate, Co(IV) is formed at potentials commensurate with electrocatalytic O2 evolution (+1.2 V, vs. SHE). The EPR resonance position of the Co(IV) species shifts to higher fields as the potential is increased above 1.2 V. Such a shift of the Co(IV) signal may be assigned to changes in the local Co structure, displaying a more distorted ligand field or more ligand radical character, suggesting it is this subset of sites that represents the catalytically ‘active’ component. The described spectroelectrochemical approach provides new information on catalyst function and reaction pathways of water oxidation.

scholarly journals Evaluation of sputtered nickel oxide, cobalt oxide and nickel–cobalt oxide on n-type silicon photoanodes for solar-driven O2(g) evolution from water

2020 ◽  
Vol 8 (28) ◽  
pp. 13955-13963 ◽  
Author(s):  
Fan Yang ◽  
Xinghao Zhou ◽  
Noah T. Plymale ◽  
Ke Sun ◽  
Nathan S. Lewis
Keyword(s):  
Thin Films ◽  
Nickel Oxide ◽  
Cobalt Oxide ◽  
Water Oxidation ◽  
Type Silicon ◽  
Nickel Cobalt ◽  
Nickel Cobalt Oxide

Thin films of nickel oxide (NiOx), cobalt oxide (CoOx) and nickel–cobalt oxide (NiCoOx) produced integrated, protected Si (111) photoanodes integrated, protected Si photoanodes that did not require deposition of a separate heterogeneous electrocatalyst for water oxidation.

Concentrated-acid triggered superfast generation of porous amorphous cobalt oxide toward efficient water oxidation catalysis in alkaline solution

2019 ◽  
Vol 55 (12) ◽  
pp. 1797-1800 ◽  
Author(s):  
Xuqiang Ji ◽  
Yujia He ◽  
Jingquan Liu
Keyword(s):  
Cobalt Oxide ◽  
Alkaline Solution ◽  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Oxidation Catalyst ◽  
Carbon Cloth ◽  
Water Oxidation Catalysis

Amorphous cobalt oxide on carbon cloth (AMO-CoO/CC) was prepared as an excellent water-oxidation catalyst with 50 mV less overpotential at 10 mA cm−2 than highly-crystallized Co3O4 in 1.0 M KOH.

Sub-2 nm cobalt oxide cluster catalyst supported on alumina for efficient water oxidation

2016 ◽  
Vol 521 ◽  
pp. 154-159 ◽  
Author(s):  
Zheng Chen ◽  
Shu Miao ◽  
Jingqi Guan ◽  
Fuxiang Zhang ◽  
Can Li
Keyword(s):  
Cobalt Oxide ◽  
Water Oxidation ◽  
Oxide Cluster

Facile deposition of nanostructured cobalt oxide catalysts from molecular cobaloximes for efficient water oxidation

2013 ◽  
Vol 15 (30) ◽  
pp. 12534 ◽  
Author(s):  
Ali Han ◽  
Haotian Wu ◽  
Zijun Sun ◽  
Hongxing Jia ◽  
Pingwu Du
Keyword(s):  
Cobalt Oxide ◽  
Water Oxidation ◽  
Oxide Catalysts
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