| 학회 |
한국재료학회 |
| 학술대회 |
2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 |
26권 1호 |
| 발표분야 |
C. 에너지 재료 분과 |
| 제목 |
Spinel-type Ni2GeO4 Nanostructure as a Novel Electrocatalyst for Electrochemical Ammonia Synthesis via Nitrogen Reduction Reaction under Ambient Conditions |
| 초록 |
The electrochemical nitrogen reduction reaction (ENRR) for ammonia synthesis under ambient conditions is recognized as an environmental-friendly strategy compared to the conventional Haber-Bosh 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). Recent studies on ENRR activity reports suggest that to increase the efficiency of the ENRR activity, the suppression of HER reaction is inevitable for the catalyst to adsorb the nitrogen in the process of ammonia production. In this regard, transition metal oxides are recognized to be the potential electrocatalysts that contribute a sluggish activity to deteriorate HER reactions to empower the ENRR activity. However, 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 a novel electrocatalysts for ENRR for the first time. The prepared spinel-type Ni2GeO4 is composed of NiO octahedra and GeO2 tetrahedral sites. Here, the NiO has been reported to boost the electrochemical reactions. Notably, 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 abundant active sites of nickel and germanium, and exceptional electrochemical properties due to changes in electronic structures due to the interaction between NiO and GeO2 polyhedral. Thus, these primary investigations intend to inspire the development of Ni2GeO4 based electrocatalysts with innovative approaches to influence superior ENRR activity. |
| 저자 |
최현욱, 김도훈, Subramani Surendran, 임윤구, 채유진, 심욱
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| 소속 |
전남대 |
| 키워드 |
Ammonia Production; Electrochemical Nitrogen Reduction Reaction; Spinel; Ni2GeO4; Electrocatalyst
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| E-Mail |
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