scholarly journals Competition between CO2 Reduction and Hydrogen Evolution on a Gold Electrode under Well-Defined Mass Transport Conditions

2020 ◽  
Vol 142 (9) ◽  
pp. 4154-4161 ◽  
Author(s):  
Akansha Goyal ◽  
Giulia Marcandalli ◽  
Vladislav A. Mints ◽  
Marc T. M. Koper
Keyword(s):  
Mass Transport ◽  
Hydrogen Evolution ◽  
Gold Electrode ◽  
Co2 Reduction

scholarly journals A high throughput optical method for studying compositional effects in electrocatalysts for CO2 reduction

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jeremy L. Hitt ◽  
Yuguang C. Li ◽  
Songsheng Tao ◽  
Zhifei Yan ◽  
Yue Gao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Throughput ◽  
High Throughput Screening ◽  
Screening Method ◽  
Co2 Reduction ◽  
Fold Increase ◽  
Faradaic Efficiency ◽  
Atomic Pair Distribution Function ◽  
Earth Abundant ◽  
Ternary Catalysts

AbstractIn the problem of electrochemical CO2 reduction, the discovery of earth-abundant, efficient, and selective catalysts is essential to enabling technology that can contribute to a carbon-neutral energy cycle. In this study, we adapt an optical high throughput screening method to study multi-metallic catalysts for CO2 electroreduction. We demonstrate the utility of the method by constructing catalytic activity maps of different alloyed elements and use X-ray scattering analysis by the atomic pair distribution function (PDF) method to gain insight into the structures of the most active compositions. Among combinations of four elements (Au, Ag, Cu, Zn), Au6Ag2Cu2 and Au4Zn3Cu3 were identified as the most active compositions in their respective ternaries. These ternary electrocatalysts were more active than any binary combination, and a ca. 5-fold increase in current density at potentials of −0.4 to −0.8 V vs. RHE was obtained for the best ternary catalysts relative to Au prepared by the same method. Tafel plots of electrochemical data for CO2 reduction and hydrogen evolution indicate that the ternary catalysts, despite their higher surface area, are poorer catalysts for the hydrogen evolution reaction than pure Au. This results in high Faradaic efficiency for CO2 reduction to CO.

Metal-Free Fluorine-Doped Carbon Electrocatalyst for CO2 Reduction Outcompeting Hydrogen Evolution

2018 ◽  
Vol 130 (31) ◽  
pp. 9788-9792 ◽  
Author(s):  
Jiafang Xie ◽  
Xiaotao Zhao ◽  
Maoxiang Wu ◽  
Qiaohong Li ◽  
Yaobing Wang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Co2 Reduction ◽  
Metal Free

Electrocatalytic CO2 Reduction in Acetonitrile Enhanced by the Local Environment and Mass Transport of H2O

2022 ◽  
pp. 602-609
Author(s):  
Padmanabh B. Joshi ◽  
Nawaraj Karki ◽  
Andrew J. Wilson
Keyword(s):  
Mass Transport ◽  
Co2 Reduction ◽  
Local Environment

Enhancing CO2 reduction by suppressing hydrogen evolution with polytetrafluoroethylene protected copper nanoneedles

2020 ◽  
Vol 8 (31) ◽  
pp. 15936-15941 ◽  
Author(s):  
Pengda An ◽  
Lai Wei ◽  
Huangjingwei Li ◽  
Baopeng Yang ◽  
Kang Liu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Evolution ◽  
Co2 Reduction ◽  
Carbon Dioxide Reduction ◽  
Reduction Reaction

Enhanced carbon dioxide reduction reaction (CO2RR) with suppressed HER was achieved on polytetrafluoroethylene (PTFE) coated Cu nanoneedles (CuNNs).

MXenes: Applications in electrocatalytic, photocatalytic hydrogen evolution reaction and CO2 reduction

2020 ◽  
Vol 486 ◽  
pp. 110850 ◽  
Author(s):  
Thang Phan Nguyen ◽  
Dinh Minh Tuan Nguyen ◽  
Dai Lam Tran ◽  
Hai Khoa Le ◽  
Dai-Viet N. Vo ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Co2 Reduction ◽  
Photocatalytic Hydrogen Evolution

Electrochemical hydrogen evolution and CO2 reduction over hierarchical MoSxSe2-x hybrid nanostructures

2019 ◽  
Vol 489 ◽  
pp. 976-982 ◽  
Author(s):  
Hye In Lee ◽  
Hwanhee Yu ◽  
Choong Kyun Rhee ◽  
Youngku Sohn
Keyword(s):  
Hydrogen Evolution ◽  
Co2 Reduction ◽  
Hybrid Nanostructures

scholarly journals Photocatalytic CO2 Reduction and Electrocatalytic H2 Evolution over Pt(0,II,IV)-Loaded Oxidized Ti Sheets

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1909
Author(s):  
Ju Hyun Yang ◽  
So Jeong Park ◽  
Choong Kyun Rhee ◽  
Youngku Sohn
Keyword(s):  
Hydrogen Evolution ◽  
Photoelectron Spectroscopy ◽  
Co2 Reduction ◽  
Oxidation States ◽  
X Ray ◽  
Catalytic Activities ◽  
Before And After ◽  
Reduction Methods ◽  
Chemical States ◽  
Sputter Deposited

Energy recycling and production using abundant atmospheric CO2 and H2O have increasingly attracted attention for solving energy and environmental problems. Herein, Pt-loaded Ti sheets were prepared by sputter-deposition and Pt4+-reduction methods, and their catalytic activities on both photocatalytic CO2 reduction and electrochemical hydrogen evolution were fully demonstrated. The surface chemical states were completely examined by X-ray photoelectron spectroscopy before and after CO2 reduction. Gas chromatography confirmed that CO, CH4, and CH3OH were commonly produced as CO2 reduction products with total yields up to 87.3, 26.9, and 88.0 μmol/mol, respectively for 700 °C-annealed Ti under UVC irradiation for 13 h. Pt-loading commonly negated the CO2 reduction yields, but CH4 selectivity was increased. Electrochemical hydrogen evolution reaction (HER) activity showed the highest activity for sputter-deposited Pt on 400 °C-annealed Ti with a HER current density of 10.5 mA/cm2 at −0.5 V (vs. Ag/AgCl). The activities of CO2 reduction and HER were found to be significantly dependent on both the nature of Ti support and the oxidation states (0,II,IV) of overlayer Pt. The present result could provide valuable information for designing efficient Pt/Ti-based CO2 recycle photocatalysts and electrochemical hydrogen production catalysts.

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