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RISS 인기검색어
- 검색키워드
- 주제어 : Electron mediator monitoring sensor (검색결과 3 건)
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Muthuraman, G.,Silambarasan, P.,Moon, I.S. Elsevier 2019 ELECTROCHIMICA ACTA Vol.295 No.-
<P><B>Abstract</B></P> <P>An ex-situ potentiometric titrations were normally performed using an oxidation/reduction potential (ORP) electrode to monitor the electrochemically generated active electron mediators, either oxidants or reductants, in a mediator generation plant. In the present investigation, an attempt was made to monitor electron mediator [Ni<SUP>1+</SUP>(CN)<SUB>4</SUB>]<SUP>3-</SUP> (Ni(I)) in-situ in a high electrolyte concentration (9 M KOH) during its electrochemical generation. A ring type flow cell developed using a 0.6 cm diameter electrode was tested on a standard redox couple of [Fe<SUP>3+</SUP>(CN)<SUB>6</SUB>]<SUP>3-</SUP> (Fe(III))/[Fe<SUP>2+</SUP>(CN)<SUB>6</SUB>]<SUP>4-</SUP> (Fe(II)) at different ratios during solution flow. The found results suggested that direct determination of an electrochemically prepared electron mediator is possible using a potentiometric method. A periodical potential change in the in-situ linear sweep voltammetry of electrogenerated Ni(I) during its electrochemical generation allowed the direct determination of electrogenerated Ni(I) by the ring type flow cell. A calibration plot derived from chemically synthesized Ni(I) using an ex-situ potentiometric titration or UV–visible spectra was used to monitor electrogenerated Ni(I) by the in-situ method. The electrochemically generated Ni(I) concentration detected in the 0–4.5 mmol/L region that followed non-Nernstian behavior. A change in the Ni(I) concentration during N<SUB>2</SUB>O removal at the scrubber column suggesting that air pollutant removal can be monitored using the in-situ flow sensor cell, once how many electron involved in the removal process.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Established a macro flow sensor for in-situ monitoring low valent metal ions during its electrogeneration. </LI> <LI> Periodical limiting peak potential change during electrolysis favors to sense Ni(I). </LI> <LI> A 0–5 mm Ni(I) range derived with a slope of non-Nernstian behavior. </LI> <LI> A defined Ni(I) concentration change when N<SUB>2</SUB>O removal correlates automation is possible by in-situ sensor. </LI> </UL> </P>
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( Perumal Silambarasan ),( G. Muthuraman ),문일식 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Our recent publication unfolded an in-line determination of homogeneous electron mediator but, validation by a standard hydrodynamic method is still deserved. In the present investigation, a comparative analysis by RDE (rotating disc electrode) and flow cell methods were optimized in development of on-line potentiometric sensor for homogeneous electron mediator generation. First, [Co(I)(CN)<sub>5</sub>]<sup>4-</sup> (Co(I)) was electrochemically generated in 10 M KOH solution by Nafion324 membrane divided electrochemical cell. The electrogenerated solution monitored by current and potential using RDE and flow cell with different RPM (rotation per minute) and flow rate by cyclic voltammetry (CV) method. By comparing the peak potential and peak current change, validation of a suitable method was derived for potentiometric sensor in determination of homogeneous electrogenerated electron mediator.
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( Perumal Silambarasan ),( Govindan Muthuraman ),문일식 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Very recently, an in-situ determination of electron mediators’ quantification was developed by potentiometric sensor method. Here in, a rationalization of potentiometric sensor by RDE (rotating disc electrode) and flow cell methods were optimized. First, electrochemical generation of [Co(I)(CN)5]4- in 10 M KOH solution was done by Nafion324 membrane divided electrochemical cell. The electrogenerated solution monitored by current and potential using RDE and flow cell with different RPM (rotation per minute) and flow rate by cyclic voltammetry (CV) method. By comparing the peak potential and peak current change, validation of a suitable method was derived for potentiometric sensor in determination of electrogenerated electron mediator in solution.
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