Water Oxidation Electrocatalysis with a Cobalt-Borate-Based Hybrid System under Neutral Conditions

Chemistry : a European Journal
Emine A TurhanFerdi Karadas

Abstract

The development of new water oxidation electrocatalysts that are both stable and efficient, particularly in neutral conditions, holds great promise for overall water splitting. In this study, the electrocatalytic water oxidation performance of a new cobalt-based catalyst, Co3 (BO3 )2 , with a Kotoite-type crystal structure is investigated under neutral conditions. The catalyst is also hybridized with CNTs to enhance its electrocatalytic properties. A remarkable increase in catalytic current along with a significant shift in the onset overpotential is observed in Co3 (BO3 )2 @CNT. Additionally, CNT addition also greatly influences the surface concentration of the catalyst: 12.7 nmol cm-2 for Co3 (BO3 )2 @CNT compared with 3.9 nmol cm-2 for Co3 (BO3 )2 . Co3 (BO3 )2 @CNT demands overpotentials of 303 and 487 mV to attain current densities of 1 and 10 mA cm-2 , respectively, at pH 7. Electrochemical and characterization studies performed over varying pH conditions reveal that the catalyst retains its stability over a pH range of 3-14. Multi-reference quantum chemical calculations are performed to study the nature of the active cobalt sites and the effect of boron atoms on the activity of the cobalt ions.

References

Mar 12, 2004·Annual Review of Physical Chemistry·M W Schmidt, M S Gordon
Nov 10, 2006·Chemical Reviews·James P McEvoy, Gary W Brudvig
Feb 3, 2009·Journal of the American Chemical Society·Yogesh SurendranathDaniel G Nocera
Oct 28, 2010·Journal of the American Chemical Society·Yogesh SurendranathDaniel G Nocera
Mar 2, 2011·Chemical Communications : Chem Comm·Derek J WasylenkoCurtis P Berlinguette
Apr 6, 2012·Accounts of Chemical Research·Daniel G Nocera
Nov 8, 2012·Chemical Communications : Chem Comm·Derek J WasylenkoCurtis P Berlinguette
Apr 4, 2013·Journal of the American Chemical Society·Christopher L FarrowSimon J L Billinge
Aug 28, 2013·Journal of the American Chemical Society·Sara PintadoJosé Ramón Galán-Mascarós
Sep 21, 2013·Journal of the American Chemical Society·Giuseppe MattioliLeonardo Guidoni
Jun 23, 2015·Chemical Communications : Chem Comm·Ali HanPingwu Du
Feb 2, 2012·The Journal of Physical Chemistry Letters·Youngmin LeeYang Shao-Horn
Sep 15, 2015·Nature Communications·Hyunah KimKisuk Kang
Dec 29, 2015·Journal of the American Chemical Society·Hsin-Yi WangBin Liu
Nov 1, 2016·Journal of the American Chemical Society·Gong ZhangJinghong Li
Dec 15, 2016·Journal of the American Chemical Society·Lijuan HanJose Ramon Galan-Mascaros
Mar 25, 2017·Nature Communications·Bin WangWonwoo Nam

❮ Previous
Next ❯

Citations

Jul 3, 2019·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Xin BoChuan Zhao
May 1, 2021·Chemistry : a European Journal·T Gamze Ulusoy GhobadiFerdi Karadas

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.