| Title: | Electrocatalytic activity and volatile product selectivity for nitrate reduction at tin-modified Pt(100), Pd(100) and Pd–Pt(100) single crystal electrodes in acidic media |
| Authors: | Kato, Masaru Browse this author →KAKEN DB |
| Unuma, Yuki Browse this author |
| Okui, Manabu Browse this author |
| Qu, Yunteng Browse this author |
| Zheng, Jinhang Browse this author |
| Taguchi, Satoshi Browse this author →KAKEN DB |
| Kiguchi, Fumiya Browse this author |
| Torihata, Mashu Browse this author |
| Gao, Yunzhi Browse this author |
| Hoshi, Nagahiro Browse this author |
| Yagi, Ichizo Browse this author →KAKEN DB |
| Keywords: | Nitrate reduction reaction |
| Single crystal electrode |
| Denitrification |
| Differential electrochemical mass spectroscopy |
| Online electrochemical mass spectroscopy |
| Issue Date: | 1-Dec-2021 |
| Publisher: | Elsevier |
| Journal Title: | Electrochimica Acta |
| Volume: | 398 |
| Start Page: | 139281 |
| Publisher DOI: | 10.1016/j.electacta.2021.139281 |
| Abstract: | We prepared Sn-modified Pt(100), Pd(100) and Pd–Pt(100) single crystal electrodes and investigated the nitrate reduction reaction (NO3RR) activity and the product selectivity for them using online electrochemical mass spectroscopy (OLEMS), also known as differential electrochemical mass spectroscopy (DEMS). OLEMS measurements allowed us to quantify volatile products of N2, N2O and NO and confirm the production of N2 at Sn/Pd(100) but not at Sn/Pt(100). Pd-doping to Pt(100) with a 3 atomic % increased the product selectivity for the NO3RR to N2. These results indicate that the presence of Pd in the (100) surface is the key to produce N2, which seems to be related to the hydrogen adsorption energy to the metal surface. The suppression of hydrogenation of intermediate species at the electrode surface could lead to the production of N2. This work will guide us to understand N2 production mechanism for the NO3RR and develop highly selective electrocatalysts for denitrification. |
| Rights: | © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/90759 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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