Photocatalytic CO<sub>2</sub> Reduction and Electrocatalytic H<sub>2</sub> Evolution over Pt(0,II,IV)-Loaded Oxidized Ti Sheets
Energy recycling and production using abundant atmospheric CO<sub>2</sub> and H<sub>2</sub>O have increasingly attracted attention for solving energy and environmental problems. Herein, Pt-loaded Ti sheets were prepared by sputter-deposition and Pt<sup>4+</sup>-re...
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MDPI AG
2020-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/10/1909 |
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| author | Ju Hyun Yang So Jeong Park Choong Kyun Rhee Youngku Sohn |
| author_facet | Ju Hyun Yang So Jeong Park Choong Kyun Rhee Youngku Sohn |
| author_sort | Ju Hyun Yang |
| collection | DOAJ |
| description | Energy recycling and production using abundant atmospheric CO<sub>2</sub> and H<sub>2</sub>O have increasingly attracted attention for solving energy and environmental problems. Herein, Pt-loaded Ti sheets were prepared by sputter-deposition and Pt<sup>4+</sup>-reduction methods, and their catalytic activities on both photocatalytic CO<sub>2</sub> reduction and electrochemical hydrogen evolution were fully demonstrated. The surface chemical states were completely examined by X-ray photoelectron spectroscopy before and after CO<sub>2</sub> reduction. Gas chromatography confirmed that CO, CH<sub>4</sub>, and CH<sub>3</sub>OH were commonly produced as CO<sub>2</sub> 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 CO<sub>2</sub> reduction yields, but CH<sub>4</sub> 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/cm<sup>2</sup> at −0.5 V (vs. Ag/AgCl). The activities of CO<sub>2</sub> 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 CO<sub>2</sub> recycle photocatalysts and electrochemical hydrogen production catalysts. |
| first_indexed | 2024-03-10T16:04:39Z |
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| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T16:04:39Z |
| publishDate | 2020-09-01 |
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| series | Nanomaterials |
| spelling | doaj.art-5c797c2226994e45b4331d26382931052023-11-20T15:00:16ZengMDPI AGNanomaterials2079-49912020-09-011010190910.3390/nano10101909Photocatalytic CO<sub>2</sub> Reduction and Electrocatalytic H<sub>2</sub> Evolution over Pt(0,II,IV)-Loaded Oxidized Ti SheetsJu Hyun Yang0So Jeong Park1Choong Kyun Rhee2Youngku Sohn3Department of Chemistry, Chungnam National University, Daejeon 34134, KoreaDepartment of Chemistry, Chungnam National University, Daejeon 34134, KoreaDepartment of Chemistry, Chungnam National University, Daejeon 34134, KoreaDepartment of Chemistry, Chungnam National University, Daejeon 34134, KoreaEnergy recycling and production using abundant atmospheric CO<sub>2</sub> and H<sub>2</sub>O have increasingly attracted attention for solving energy and environmental problems. Herein, Pt-loaded Ti sheets were prepared by sputter-deposition and Pt<sup>4+</sup>-reduction methods, and their catalytic activities on both photocatalytic CO<sub>2</sub> reduction and electrochemical hydrogen evolution were fully demonstrated. The surface chemical states were completely examined by X-ray photoelectron spectroscopy before and after CO<sub>2</sub> reduction. Gas chromatography confirmed that CO, CH<sub>4</sub>, and CH<sub>3</sub>OH were commonly produced as CO<sub>2</sub> 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 CO<sub>2</sub> reduction yields, but CH<sub>4</sub> 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/cm<sup>2</sup> at −0.5 V (vs. Ag/AgCl). The activities of CO<sub>2</sub> 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 CO<sub>2</sub> recycle photocatalysts and electrochemical hydrogen production catalysts.https://www.mdpi.com/2079-4991/10/10/1909energy recyclingphotocatalytic CO<sub>2</sub> reductionelectrochemical hydrogen evolutionTi oxidePt oxidation state |
| spellingShingle | Ju Hyun Yang So Jeong Park Choong Kyun Rhee Youngku Sohn Photocatalytic CO<sub>2</sub> Reduction and Electrocatalytic H<sub>2</sub> Evolution over Pt(0,II,IV)-Loaded Oxidized Ti Sheets Nanomaterials energy recycling photocatalytic CO<sub>2</sub> reduction electrochemical hydrogen evolution Ti oxide Pt oxidation state |
| title | Photocatalytic CO<sub>2</sub> Reduction and Electrocatalytic H<sub>2</sub> Evolution over Pt(0,II,IV)-Loaded Oxidized Ti Sheets |
| title_full | Photocatalytic CO<sub>2</sub> Reduction and Electrocatalytic H<sub>2</sub> Evolution over Pt(0,II,IV)-Loaded Oxidized Ti Sheets |
| title_fullStr | Photocatalytic CO<sub>2</sub> Reduction and Electrocatalytic H<sub>2</sub> Evolution over Pt(0,II,IV)-Loaded Oxidized Ti Sheets |
| title_full_unstemmed | Photocatalytic CO<sub>2</sub> Reduction and Electrocatalytic H<sub>2</sub> Evolution over Pt(0,II,IV)-Loaded Oxidized Ti Sheets |
| title_short | Photocatalytic CO<sub>2</sub> Reduction and Electrocatalytic H<sub>2</sub> Evolution over Pt(0,II,IV)-Loaded Oxidized Ti Sheets |
| title_sort | photocatalytic co sub 2 sub reduction and electrocatalytic h sub 2 sub evolution over pt 0 ii iv loaded oxidized ti sheets |
| topic | energy recycling photocatalytic CO<sub>2</sub> reduction electrochemical hydrogen evolution Ti oxide Pt oxidation state |
| url | https://www.mdpi.com/2079-4991/10/10/1909 |
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