A robust and efficient cobalt molecular catalyst for CO2 reduction

2015 ◽  
Vol 51 (37) ◽  
pp. 7799-7801 ◽  
Author(s):  
Sharon Lai-Fung Chan ◽  
Tsz Lung Lam ◽  
Chen Yang ◽  
Siu-Cheong Yan ◽  
Nga Man Cheng
Keyword(s):  
Cobalt Catalyst ◽  
Co2 Reduction ◽  
Molecular Catalyst

A robust and efficient cobalt catalyst for CO2 reduction.

Molecular electrocatalysts can mediate fast, selective CO2 reduction in a flow cell

Science ◽  
2019 ◽  
Vol 365 (6451) ◽  
pp. 367-369 ◽  
Author(s):  
Shaoxuan Ren ◽  
Dorian Joulié ◽  
Danielle Salvatore ◽  
Kristian Torbensen ◽  
Min Wang ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Operating Conditions ◽  
High Current ◽  
Membrane Flow ◽  
Molecular Catalyst ◽  
Current Densities ◽  
Molecular Catalysts ◽  
Distinct Approach

Practical electrochemical carbon dioxide (CO2) conversion requires a catalyst capable of mediating the efficient formation of a single product with high selectivity at high current densities. Solid-state electrocatalysts achieve the CO2 reduction reaction (CO2RR) at current densities ≥ 150 milliamperes per square centimeter (mA/cm2), but maintaining high selectivities at high current densities and efficiencies remains a challenge. Molecular CO2RR catalysts can be designed to achieve high selectivities and low overpotentials but only at current densities irrelevant to commercial operation. We show here that cobalt phthalocyanine, a widely available molecular catalyst, can mediate CO2 to CO formation in a zero-gap membrane flow reactor with selectivities > 95% at 150 mA/cm2. The revelation that molecular catalysts can work efficiently under these operating conditions illuminates a distinct approach for optimizing CO2RR catalysts and electrolyzers.

Bio-proton coupled semiconductor/metal-complex hybrid photoelectrocatalytic interface for efficient CO2 reduction

2019 ◽  
Vol 21 (2) ◽  
pp. 339-348 ◽  
Author(s):  
Jibo Liu ◽  
Chenyan Guo ◽  
Xiaojun Hu ◽  
Guohua Zhao
Keyword(s):  
Proton Transfer ◽  
Metal Complex ◽  
High Efficiency ◽  
Co2 Reduction ◽  
Semiconductor Substrate ◽  
Molecular Catalyst ◽  
Proton Coupling ◽  
Complex Hybrid ◽  
Complex Semiconductor

Aimed at high-efficiency biomimetic CO2 photoelectrochemical conversion, a bio-proton coupling metal-complex/semiconductor hybrid photoelectrocatalytic interface (Ru-BNAH/TiO2/Cu2O) was constructed by covalently modifying an in situ proton-transfer functionized molecular catalyst (Ru-BNAH) on the surface of a TiO2/Cu2O composite semiconductor substrate electrode.

Photocatalytic CO2 reduction using a molecular cobalt complex deposited on TiO2 nanoparticles

2014 ◽  
Vol 50 (47) ◽  
pp. 6221-6224 ◽  
Author(s):  
Tong Jin ◽  
Chao Liu ◽  
Gonghu Li
Keyword(s):  
Tio2 Nanoparticles ◽  
Cobalt Catalyst ◽  
Cobalt Complex ◽  
Co2 Reduction

A macrocyclic cobalt catalyst is effectively coupled with TiO2 nanoparticles for photocatalytic CO2 reduction.

Photocatalytic CO2 Reduction to Formate Using a Mn(I) Molecular Catalyst in a Robust Metal–Organic Framework

2015 ◽  
Vol 54 (14) ◽  
pp. 6821-6828 ◽  
Author(s):  
Honghan Fei ◽  
Matthew D. Sampson ◽  
Yeob Lee ◽  
Clifford P. Kubiak ◽  
Seth M. Cohen
Keyword(s):  
Metal Organic Framework ◽  
Co2 Reduction ◽  
Molecular Catalyst ◽  
Metal Organic ◽  
Organic Framework

Selective Photocatalytic CO2 Reduction in Water by Electrostatic Assembly of CdS Nanocrystals with a Dinuclear Cobalt Catalyst

ACS Catalysis ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 11815-11821 ◽  
Author(s):  
Qian-Qian Bi ◽  
Jia-Wei Wang ◽  
Jia-Xin Lv ◽  
Juan Wang ◽  
Wen Zhang ◽  
...  
Keyword(s):  
Cobalt Catalyst ◽  
Co2 Reduction ◽  
Electrostatic Assembly ◽  
Cds Nanocrystals

Microwave-assisted deposition of a highly active cobalt catalyst on mesoporous silica for photochemical CO2 reduction

2017 ◽  
Vol 46 (32) ◽  
pp. 10721-10726 ◽  
Author(s):  
Thomas Fenton ◽  
Samantha Gillingham ◽  
Tong Jin ◽  
Gonghu Li
Keyword(s):  
Thermal Treatment ◽  
Mesoporous Silica ◽  
Cobalt Catalyst ◽  
Co2 Reduction ◽  
Silica Surfaces ◽  
Microwave Assisted ◽  
Highly Active

Uniform Co(iii) sites were obtained on the silica surfaces. Thermal treatment under vacuum resulted in significant changes in the properties of the Co(iii) sites.

scholarly journals Improving photosensitization for photochemical CO2-to-CO conversion

2020 ◽  
Vol 7 (9) ◽  
pp. 1459-1467
Author(s):  
Ping Wang ◽  
Ru Dong ◽  
Song Guo ◽  
Jianzhang Zhao ◽  
Zhi-Ming Zhang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Driving Force ◽  
Cobalt Catalyst ◽  
Co2 Reduction ◽  
Excited State Lifetime ◽  
Turnover Number ◽  
Co Conversion ◽  
First Time ◽  
Insight Into

Abstract Inspired by nature, improving photosensitization represents a vital direction for the development of artificial photosynthesis. The sensitization ability of photosensitizers (PSs) reflects in their electron-transfer ability, which highly depends on their excited-state lifetime and redox potential. Herein, for the first time, we put forward a facile strategy to improve sensitizing ability via finely tuning the excited state of Ru(II)-PSs (Ru-1–Ru-4) for efficient CO2 reduction. Remarkably, [Ru(Phen)2(3-pyrenylPhen)]2+ (Ru-3) exhibits the best sensitizing ability among Ru-1–Ru-4, over 17 times higher than that of typical Ru(Phen)32+. It can efficiently sensitize a dinuclear cobalt catalyst for CO2-to-CO conversion with a maximum turnover number of 66 480. Systematic investigations demonstrate that its long-lived excited state and suitable redox driving force greatly contributed to this superior sensitizing ability. This work provides a new insight into dramatically boosting photocatalytic CO2 reduction via improving photosensitization.

Highly Efficient and Selective Photocatalytic CO2 Reduction to CO in Water by a Cobalt Porphyrin Molecular Catalyst

ACS Catalysis ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 4867-4874 ◽  
Author(s):  
Arnau Call ◽  
Mihaela Cibian ◽  
Keiya Yamamoto ◽  
Takashi Nakazono ◽  
Kosei Yamauchi ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Cobalt Porphyrin ◽  
Molecular Catalyst ◽  
Highly Efficient
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