Simultaneous electrochemical detection of ozone and free chlorine with a boron-doped diamond electrode

Abstract

O3 and free chlorine play significant roles in disinfection and organic degradation. There are numerous reports about their mixed-use, yet detection of the residual concentrations is not easily accomplished, whilst...

Anode Reaction Control for a Single‐Compartment Electrochemical CO2 Reduction Reactor with a Surface‐Activated Diamond Cathode

“…The authors previously reported free chlorine detection at BDD anode (equation 4) [66] . Also, cathodic reduction of HClO and hypochlorite ions (ClO − ) at BDD cathode were reported, which are represented by equation [67,68] $$$\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {\rm Cl}{_{2}}+{\rm 2e}\rightarrow {\rm 2Cl}{^{- }}\hfill\cr}}$$$ $$$\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {\rm HClO}+{\rm e}\rightarrow {\rm HClO}{^{- }}\hfill\cr}}$$$ $$$\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {\rm 2HClO}{^{- }}\rightarrow {\rm Cl}{^{- }}+{\rm ClO}{^{- }}+{\rm H}{_{2}}{\rm O}\hfill\cr}}$$$ …”

“…[66] Also, cathodic reduction of HClO and hypochlorite ions (ClO À ) at BDD cathode were reported, which are represented by equation 5. [67,68] Cl 2 þ 2e ! 2Cl À (4)…”

Boron-Doped Diamond as a Quasi-Reference Electrode

“…Typical BDD films were grown on a silicon (100) substrate for 6 h with a microwave plasma chemical vapor deposition method, as reported previously . Methane and trimethyl borane was used as the carbon and boron sources, respectively.…”

“…Typical BDD films were grown on a silicon (100) substrate for 6 h with a microwave plasma chemical vapor deposition method, as reported previously. 25 Methane and trimethyl borane was used as the carbon and boron sources, respectively. The boron concentration in the BDD films was set to 0.1 and 1% by adjusting the ratio of boron-to-carbon in the feeding gases.…”