| 학회 |
한국재료학회 |
| 학술대회 |
2021년 봄 (05/12 ~ 05/14, 광주 김대중컨벤션센터) |
| 권호 |
27권 1호 |
| 발표분야 |
E. 환경/센서 재료 분과 |
| 제목 |
The Spinel-type Ni2GeO4 Electrocatalyst with improved catalytic activity for efficient electrochemical N2 fixation to NH3 under ambient conditions |
| 초록 |
Ammonia (NH3) as a fundamental chemical material is essential to industrial areas for fertilizer, hydrogen storage, and fuels. Generally, the production of 180 million tons of NH3 per year depends on the Haber-Bosch process. This energy-intensive process consumes nature gas with huge CO2 emissions. The electrochemical nitrogen reduction reaction (ENRR) for ammonia synthesis under ambient conditions has emerged as a sustainable approach to overcoming the limits of the Haber-Bosch process. Nevertheless, the electrochemical synthesis of ammonia suffers from poor selectivity and low efficiency owing to the constrained catalytic activity and competitive hydrogen evolution reaction (HER). Transition metal oxides are recognized to be the potential electrocatalysts that contribute a sluggish activity to deteriorate HER reactions. Besides, the bimetallic oxides with multiple electroactive sites can promote improved catalytic activity. In this work, as a proof-of-concept, Ni2GeO4 nanoparticles synthesized via a facile hydrothermal method were investigated as novel electrocatalysts for ENRR for the first time. The prepared Ni2GeO4 electrocatalysts achieve the highest Faradaic efficiency of 3.38 % and ammonia yield rate of 2.66 μg h-1 cm-2 at – 0.1V vs. RHE. The improved ENRR activity can be attributed to the D-band center near the Fermi level, and exceptional electrochemical properties due to changes in electronic structures due to the interaction. Thus, this study intends to inspire the development of Ni2GeO4 based electrocatalysts with innovative approaches to influence ENRR activity. |
| 저자 |
Jaehyoung Lim1, Hyeonuk Choi2, Dohun Kim3, Subramani Surendran4, Yoongu Lim5, Uk Sim1
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| 소속 |
1Department of Materials Science & Engineering, 2Engineering Research Center, 3Chonnam National Univ., 4Gwangju 61186, 5South |
| 키워드 |
Nitrogen reduction reaction; Ni<SUB>2</SUB>GeO<SUB>4</SUB>; Electrocatalyst; Transition metal oxide; Ammonia
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| E-Mail |
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