Cobalt porphyrin intercalation into zirconium phosphate layers for electrochemical water oxidation

2021 ◽  
Author(s):  
Isabel Barraza Alvarez ◽  
Yanyu Wu ◽  
Joel Sanchez ◽  
Yulu Ge ◽  
Mario V. Ramos-Garcés ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Zirconium Phosphate ◽  
Porphyrin Molecule ◽  
Cobalt Porphyrin

A cobalt porphyrin molecule, namely CoTcPP (TcPP = the dianion of meso-tetra(4-carboxyphenyl)porphyrin), is intercalated into zirconium phosphate (ZrP) layers as an effective way to heterogenize a porphyrin-based molecular electrocatalyst.

Controllable Synthesis of Cobalt Porphyrin Nanocrystals through Micelle Confinement Self-Assembly

MRS Advances ◽  
2020 ◽  
Vol 5 (42) ◽  
pp. 2147-2155
Author(s):  
Sudi Chen ◽  
Xitong Ren ◽  
Shufang Tian ◽  
Jiajie Sun ◽  
Feng Bai
Keyword(s):  
Self Assembly ◽  
Water Oxidation ◽  
Separation Efficiency ◽  
Noncovalent Interactions ◽  
Building Blocks ◽  
The Self ◽  
Hexagonal Prism ◽  
Assembly Process ◽  
Surfactant Micelles ◽  
Cobalt Porphyrin

AbstractThe self-assembly of optically active building blocks into functional nanocrystals as high-activity photocatalysts is a key in the field of photocatalysis. Cobalt porphyrin with abundant catalytic properties is extensively studied in photocatalytic water oxidation and CO2 reduction. Here, we present the fabrication of cobalt porphyrin nanocrystals through a surfactant-assisted interfacial self-assembly process using Co-tetra(4-pyridyl) porphyrin as building block. The self-assembly process relies on the combined noncovalent interactions such as π-π stacking and axial Co-N coordination between individual porphyrin molecules within surfactant micelles. Tuning different reaction conditions (temperature, the ratio of co-solvent DMF) and types of surfactant, various nanocrystals with well-defined 1D to 3D morphologies such as nanowires, nanorods and nano hexagonal prism were obtained. Due to the ordered accumulation of molecules, the nanocrystals exhibit the properties of the enhanced capability of visible light capture and can conduce to improve the transport and separation efficiency of the photogenerated carriers, which is important for photocatalysis. Further studies of photocatalytic CO2 reduction are being performed to address the relationship between the size and shape of the nanocrystals with the photocatalytic activity.

Improving Singlet Oxygen Resistance during Photochemical Water Oxidation by Cobalt Porphyrin Catalysts

2015 ◽  
Vol 21 (18) ◽  
pp. 6723-6726 ◽  
Author(s):  
Takashi Nakazono ◽  
Alexander R. Parent ◽  
Ken Sakai
Keyword(s):  
Singlet Oxygen ◽  
Water Oxidation ◽  
Cobalt Porphyrin

Pyrolyzed cobalt porphyrin-modified carbon nanomaterial as an active catalyst for electrocatalytic water oxidation

2015 ◽  
Vol 40 (20) ◽  
pp. 6538-6545 ◽  
Author(s):  
Zijun Sun ◽  
Jingshi Li ◽  
Huafei Zheng ◽  
Xiang Liu ◽  
Sheng Ye ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Active Catalyst ◽  
Carbon Nanomaterial ◽  
Cobalt Porphyrin

Improving the robustness of cobalt porphyrin water oxidation catalysts by chlorination of aryl groups

2016 ◽  
Vol 45 (32) ◽  
pp. 12649-12652 ◽  
Author(s):  
Takashi Nakazono ◽  
Ken Sakai
Keyword(s):  
Singlet Oxygen ◽  
High Resistance ◽  
Water Oxidation ◽  
Oxidation Catalysts ◽  
Cobalt Porphyrin

A chlorinated cobalt porphyrin (CoClPS) shows extremely high resistance against singlet oxygen and activity for photochemical water oxidation.

Cobalt porphyrin electrode films for electrocatalytic water oxidation

2014 ◽  
Vol 16 (23) ◽  
pp. 11224-11232 ◽  
Author(s):  
Ali Han ◽  
Hongxing Jia ◽  
Hao Ma ◽  
Shifan Ye ◽  
Haotian Wu ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Water Oxidation ◽  
Reaction System ◽  
Oxidation Catalysis ◽  
Cobalt Oxides ◽  
Cobalt Porphyrin ◽  
Vis Spectroscopy ◽  
Water Oxidation Catalysis

Two water-insoluble cobalt porphyrin complexes were synthesized and used to prepare electrode films on FTO. The films showed good activities and possible recyclability for water oxidation catalysis under benign conditions. No heterogeneous cobalt oxides were observed in the reaction system, as have been confirmed by UV-vis spectroscopy, mass spectrometry, SEM, and EDX measurements.

Re-Investigation of Cobalt Porphyrin for Electrochemical Water Oxidation on FTO Surface: Formation of CoOx as Active Species

ACS Catalysis ◽  
2017 ◽  
Vol 7 (2) ◽  
pp. 1143-1149 ◽  
Author(s):  
Quentin Daniel ◽  
Ram B. Ambre ◽  
Biaobiao Zhang ◽  
Bertrand Philippe ◽  
Hong Chen ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Active Species ◽  
Surface Formation ◽  
Cobalt Porphyrin

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.

Impact Of Synthesis Route on the Water Oxidation Kinetics of Hematite Photoanodes

2020 ◽  
Author(s):  
Camilo A. Mesa ◽  
Ludmilla Steier ◽  
Benjamin Moss ◽  
Laia Francàs ◽  
James E. Thorne ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Reaction Kinetics ◽  
Water Oxidation ◽  
Oxidation Kinetics ◽  
Oxidation Reaction ◽  
Charge Accumulation ◽  
Optical Signals ◽  
Current Voltage ◽  
Voltage Performance ◽  
Kinetics Of

<p><i>Operando</i> spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Lower photoanode performance was found to correlate with the observation of optical signals indicative of charge accumulation in mid-gap oxygen vacancy states, indicating these states do not contribute directly to water oxidation.</p>

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