Mass Spectrometry Study of CO2 Electroreduction at Membrane Electrode Assembly Incorporating Pt-Ru/C

2017 ◽  
Vol 9 (2) ◽  
pp. 213-219 ◽  
Author(s):  
Sayoko Shironita ◽  
Kazutaka Sato ◽  
Minoru Umeda
Keyword(s):  
Mass Spectrometry ◽  
Membrane Electrode Assembly ◽  
Membrane Electrode ◽  
Mass Spectrometry Study ◽  
Co2 Electroreduction

CO2 Electroreduction to C2 / C2+ Products Using Membrane Electrode Assembly

2020 ◽  
Vol MA2020-01 (39) ◽  
pp. 1739-1739
Author(s):  
Shariful Kibria Nabil ◽  
Md Golam Kibria
Keyword(s):  
Membrane Electrode Assembly ◽  
Membrane Electrode ◽  
Co2 Electroreduction

scholarly journals CO2 current efficiency in direct ethanol fuel cell

2018 ◽  
Vol 6 (1) ◽  
pp. 581
Author(s):  
H. Hariyanto ◽  
Widodo W. Purwanto ◽  
Roekmijati W. Soemantojo
Keyword(s):  
Mass Spectrometry ◽  
Fuel Cell ◽  
Current Efficiency ◽  
Membrane Electrode Assembly ◽  
Membrane Electrode ◽  
Commercial Catalyst ◽  
Direct Ethanol Fuel Cell ◽  
Differential Electrochemical Mass Spectrometry ◽  
On Line ◽  
Electro Oxidation

In this present work, a systematically study on 20% PtCeO2/C catalyst for ethanol electro-oxidation in direct ethanol fuel cell were carried out. For cathode catalyst, a commercial catalyst of 40% Pt/C from ETEK was applied. Catalysts were printed on to carbon paper of TGPH 060 and sandwiched into membrane electrode assembly (MEA) and then arranged infitel cell with the geometric area 1.2 cm2. As an electrolyte, we used Nafion 117 from Du Pont. On-line Differential Electrochemical Mass Spectrometry (DEMS) measurement infuel cell setup was carried out in order to determine the activity and selectivity which was indicated by result of Faradaic current and CO2 current efficiency of ethanol electro-oxidation respectively. PtCeO2/C was significantly improving the selectivity of CO formation n comparison to the commercial catalyst of 20% Pt/C from A/fa Aesar- Johnson Mattews. Increasing of" selectivity was shown by the increase of CO2 current efficiency of ethanol oxidation of about 20 percent in comparison to references catalyst of 20% Pt/C (AlfaAesar-JM).Keywords: Ceria, Membrane Electrode Assembly (MEA), DEMS, Ethanol Electro-OxidationAbstrakPada peneletian ini dilakukan kajian sistematis terhadap katalis 20% PtCeO2/C yang akan digunakan pada elektro-oksidasi etanol pada sel bahan bakar etanol langsung. Untuk katalis katoda, digunakan katalis komersial 40% Pt/C dari ETEK. Katalis tersebut diaplikasikan pada kertas karbon TGPH 060 dan diselipkan pada rangkaian membran electroda (MEA) dan kemudian disusun pada sel bahan bakar yang memiliki luas geometris 1.2 cm2. Sebagai elektrolit, digunakan Nafion 117 produksi Du Pont. Pengukuran On-line oleh Spektrometri Massa Elektrokimia Diferensial atau Differential Electrochemical Mass Spectrometry (DEMS) pada pemasangan sel bahan bakar telah dilakukan untuk menentukan aktivitas dan selektivitasnya yang dapat ditunjukkan masing-masing oleh hasil arus Faradik dan efisiensi arus CO2 dari elektro-oksidasi etanol. Dari hasil percobaan diperoleh bahwa PtCeO2/C dapat secara signifikan meningkatkan selektivitas untuk membentuk CO2 dibandingkan terhadap katalis komersial 20% Pt/C dari A/fa Aesar-Johnson Mattews. Kenaikan selektivitas ditunjukkan oleh kenaikan efisiensi arus CO2pada oksidasi ethanol sebesar 20 persen dibandingkan terhadap katalis rujukan 20% Pt/C (AlfaAesar-JM).Kata Kunci: Ceria, Membrane Electrode Assembly (MEA), DEMS, Elektro-Oksidasi Etanol

scholarly journals Efficient CO2 electroreduction on facet-selective copper films with high conversion rate

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Gong Zhang ◽  
Zhi-Jian Zhao ◽  
Dongfang Cheng ◽  
Huimin Li ◽  
Jia Yu ◽  
...  
Keyword(s):  
Theoretical Calculations ◽  
Membrane Electrode Assembly ◽  
Membrane Electrode ◽  
Copper Films ◽  
Faradaic Efficiency ◽  
Polymer Binders ◽  
Co2 Electroreduction ◽  
High Conversion Rate ◽  
Insight Into

AbstractTuning the facet exposure of Cu could promote the multi-carbon (C2+) products formation in electrocatalytic CO2 reduction. Here we report the design and realization of a dynamic deposition-etch-bombardment method for Cu(100) facets control without using capping agents and polymer binders. The synthesized Cu(100)-rich films lead to a high Faradaic efficiency of 86.5% and a full-cell electricity conversion efficiency of 36.5% towards C2+ products in a flow cell. By further scaling up the electrode into a 25 cm2 membrane electrode assembly system, the overall current can ramp up to 12 A while achieving a single-pass yield of 13.2% for C2+ products. An insight into the influence of Cu facets exposure on intermediates is provided by in situ spectroscopic methods supported by theoretical calculations. The collected information will enable the precise design of CO2 reduction reactions to obtain desired products, a step towards future industrial CO2 refineries.

2,2’-Dipyridylamine as Organic Molecular Electrocatalyst for Hydrogen Evolution Reaction in Acidic Electrolytes

2019 ◽  
Author(s):  
Xi Yin ◽  
Ling Lin ◽  
Hoon T. Chung ◽  
Ulises Martinez ◽  
Andrew M. Baker ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Density Functional ◽  
Low Cost ◽  
Membrane Electrode Assembly ◽  
Carbon Surface ◽  
Membrane Electrode ◽  
Durability Test ◽  
Onset Potential ◽  
Precious Metal Catalysts

Finding a low-cost and stable electrocatalyst for hydrogen evolution reaction (HER) as a replacement for scarce and expensive precious metal catalysts has attracted significant interest from chemical and materials research communities. Here, we demonstrate an organic catalyst based on 2,2’-dipyridylamine (dpa) molecules adsorbed on carbon surface, which shows remarkable hydrogen evolution activity and performance durability in strongly acidic polymer electrolytes without involving any metal. The HER onset potential at dpa adsorbed on carbon has been found to be less than 50 mV in sulfuric acid and in a Nafion-based membrane electrode assembly (MEA). At the same time, this catalyst has shown no performance loss in a 60-hour durability test. The HER reaction mechanisms and the low onset overpotential in this system are revealed based on electrochemical study. Density functional theory (DFT) calculations suggest that the pyridyl-N functions as the active site for H adsorption with a free energy of -0.13 eV, in agreement with the unusually low onset overpotential for an organic molecular catalyst.<br>

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