Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7709805 | International Journal of Hydrogen Energy | 2017 | 12 Pages |
Abstract
This work reports the electrochemical synthesis of ammonia in solid-state cells at 220 °C and atmospheric pressure. Composites of CsH2PO4 and SiP2O7 were used as the electrolyte, and Pt/C-loaded carbon paper was employed as the anode. Five kinds of electrode materials, including Pt/C-, Pt-Ru/C-, Ru/C-, Ru- and Ag-Pd-loaded carbon paper, were examined as the cathode. Electrochemical activities of the cathode materials were evaluated by cyclic voltammetry. Both H2 and steam were used as the hydrogen source. The successful synthesis of ammonia was confirmed using Nessler's solution. When H2 was used as the hydrogen source, ammonia formation rates higher than 10â10 mol cmâ2 sâ1 were obtained using Pt/C- or Ru-loaded carbon paper as the cathode. When steam was used as the hydrogen source, ammonia formation rates higher than 10â11 mol cmâ2 sâ1 were obtained using Pt-Ru/C- or Ru/C- or Ru-loaded carbon paper as the cathode. Ru and Ag-Pd were the most promising noble metal catalysts for electrochemical synthesis of ammonia from N2 and steam.
Related Topics
Physical Sciences and Engineering
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Authors
Shota Kishira, Geletu Qing, Shuya Suzu, Ryuji Kikuchi, Atsushi Takagaki, Shigeo Ted Oyama,