The Experts below are selected from a list of 57 Experts worldwide ranked by ideXlab platform

Ifan E L Stephens - One of the best experts on this subject based on the ideXlab platform.

  • progress and perspectives of Electrochemical co2 reduction on copper in aqueous electrolyte
    Chemical Reviews, 2019
    Co-Authors: Stephanie A Nitopi, Erlend Bertheussen, Soren Bertelsen Scott, Xinyan Liu, Albert K Engstfeld, Sebastian Horch, Brian Seger, Ifan E L Stephens
    Abstract:

    To date, copper is the only heterogeneous catalyst that has shown a propensity to produce valuable hydrocarbons and alcohols, such as ethylene and ethanol, from Electrochemical CO2 reduction (CO2R). There are variety of factors that impact CO2R activity and selectivity, including the catalyst surface structure, morphology, composition, the choice of electrolyte ions and pH, and the Electrochemical Cell Design. Many of these factors are often intertwined, which can complicate catalyst discovery and Design efforts. Here we take a broad and historical view of these different aspects and their complex interplay in CO2R catalysis on Cu, with the purpose of providing new insights, critical evaluations, and guidance to the field with regard to research directions and best practices. First, we describe the various experimental probes and complementary theoretical methods that have been used to discern the mechanisms by which products are formed, and next we present our current understanding of the complex reaction networks for CO2R on Cu. We then analyze two key methods that have been used in attempts to alter the activity and selectivity of Cu: nanostructuring and the formation of bimetallic electrodes. Finally, we offer some perspectives on the future outlook for Electrochemical CO2R.

Eduardo Pinilla Gil - One of the best experts on this subject based on the ideXlab platform.

  • a novel Cell Design for the improved stripping voltammetric detection of zn ii cd ii and pb ii on commercial screen printed strips by bismuth codeposition in stirred solutions
    Electroanalysis, 2008
    Co-Authors: Ma Angeles Granado Rico, Mara Olivaresmarin, Eduardo Pinilla Gil
    Abstract:

    A novel Electrochemical Cell Design is proposed to allow fast, reproducible and highly efficient convective transport of dissolved substances to screen-printed Electrochemical three-electrode strips mounted on miniaturized plastic vessels, with the goal of improving detection limits in disposable Electrochemical stripping field sensors. The experimental configuration has been tested for accumulation of the selected heavy metals ions Zn(II), Cd(II), and Pb(II), codeposited with bismuth ions on a carbon disk screen-printed working electrode before detection by square wave anodic stripping voltammetry. Chemical and instrumental variables of the proposed device and associate Electrochemical method were optimized. Selected parameters gave detection limits in the low ng mL−1 range with moderate deposition time (120 s). Practical applicability was tested on certified water and real samples (tap water and waste water), with acceptable results, suggesting potential usefulness for field environmental monitoring of heavy metals.

Xiangqun Zeng - One of the best experts on this subject based on the ideXlab platform.

  • ionic liquids as electrolytes for the development of a robust amperometric oxygen sensor
    Analytical Chemistry, 2011
    Co-Authors: Zhe Wang, Peiling Lin, Gary A Baker, Joseph R Stetter, Xiangqun Zeng
    Abstract:

    A simple Clark-type online Electrochemical Cell Design, consisting of a platinum gauze working electrode and incorporating ionic liquids (IL) as electrolytes, has been successfully applied for the amperometric sensing of oxygen. Studying ILs comprising the bis(trifluoromethylsulfonyl)imide anion, the obtained analytical parameters were found to be strongly dependent on the choice of cation. Compared with a conventional Clark Cell Design based on an aqueous supporting electrolyte, the modified oxygen sensor achieves substantial improvements in performance and stability. A limit of detection for oxygen as low as 0.05 vol %, linearity over an oxygen partial pressure between 0% and 20%, and a steady-state response time of 2 min was demonstrated, with a stable analytical response shown over the examined period of 90 days with no obvious fouling of the electrode surface. Based on the attractive physical attributes of ionic liquids (e.g., thermal stability beyond 150 °C), one can envision intriguing utility in n...

Ahmed C Basha - One of the best experts on this subject based on the ideXlab platform.

Ma Angeles Granado Rico - One of the best experts on this subject based on the ideXlab platform.

  • a novel Cell Design for the improved stripping voltammetric detection of zn ii cd ii and pb ii on commercial screen printed strips by bismuth codeposition in stirred solutions
    Electroanalysis, 2008
    Co-Authors: Ma Angeles Granado Rico, Mara Olivaresmarin, Eduardo Pinilla Gil
    Abstract:

    A novel Electrochemical Cell Design is proposed to allow fast, reproducible and highly efficient convective transport of dissolved substances to screen-printed Electrochemical three-electrode strips mounted on miniaturized plastic vessels, with the goal of improving detection limits in disposable Electrochemical stripping field sensors. The experimental configuration has been tested for accumulation of the selected heavy metals ions Zn(II), Cd(II), and Pb(II), codeposited with bismuth ions on a carbon disk screen-printed working electrode before detection by square wave anodic stripping voltammetry. Chemical and instrumental variables of the proposed device and associate Electrochemical method were optimized. Selected parameters gave detection limits in the low ng mL−1 range with moderate deposition time (120 s). Practical applicability was tested on certified water and real samples (tap water and waste water), with acceptable results, suggesting potential usefulness for field environmental monitoring of heavy metals.