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Miyahara SI, Sato K, Tsujimaru K, Wada Y, Ogura Y, Toriyama T, Yamamoto T, Matsumura S, Inazu K, Nagaoka K. Co Nanoparticle Catalysts Encapsulated by BaO-La 2O 3 Nanofractions for Efficient Ammonia Synthesis Under Mild Reaction Conditions. ACS OMEGA 2022; 7:24452-24460. [PMID: 35874216 PMCID: PMC9301956 DOI: 10.1021/acsomega.2c01973] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Ruthenium catalysts may allow for realization of renewable energy-based ammonia synthesis processes using mild reaction conditions (<400 °C, <10 MPa). However, ruthenium is relatively rare and therefore expensive. Here, we report a Co nanoparticle catalyst loaded on a basic Ba/La2O3 support and prereduced at 700 °C (Co/Ba/La2O3_700red) that showed higher ammonia synthesis activity at 350 °C and 1.0-3.0 MPa than two benchmark Ru catalysts, Cs+/Ru/MgO and Ru/CeO2. The synthesis rate of the catalyst at 350 °C and 1.0 MPa (19.3 mmol h-1 g-1) was 8.0 times that of Co/Ba/La2O3_500red and 6.9 times that of Co/La2O3_700red. The catalyst showed ammonia synthesis activity at temperatures down to 200 °C. Reduction at the high temperature induced the formation of BaO-La2O3 nanofractions around the Co nanoparticles by decomposition of BaCO3, which increased turnover frequency, inhibited the sintering of Co nanoparticles, and suppressed ammonia poisoning. These strategies may also be applicable to other non-noble metal catalysts, such as nickel.
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Affiliation(s)
- Shin-ichiro Miyahara
- Department
of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Katsutoshi Sato
- Department
of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Kotoko Tsujimaru
- Department
of Integrated Science and Technology, Faculty of Science and Engineering, Oita University, 700 Dannoharu, Oita 870−1192, Japan
| | - Yuichiro Wada
- Department
of Integrated Science and Technology, Faculty of Science and Engineering, Oita University, 700 Dannoharu, Oita 870−1192, Japan
| | - Yuta Ogura
- Department
of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Takaaki Toriyama
- The
Ultramicroscopy Research Center, Kyushu
University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tomokazu Yamamoto
- Department
of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Motooka
744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Syo Matsumura
- The
Ultramicroscopy Research Center, Kyushu
University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
- Department
of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Motooka
744, Nishi-ku, Fukuoka 819-0395, Japan
| | - Koji Inazu
- National
Institute of Technology, Numazu College, 3600 Ooka, Numazu, Shizuoka 410-8501, Japan
| | - Katsutoshi Nagaoka
- Department
of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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Humphreys J, Lan R, Tao S. Development and Recent Progress on Ammonia Synthesis Catalysts for Haber–Bosch Process. ADVANCED ENERGY AND SUSTAINABILITY RESEARCH 2020. [DOI: 10.1002/aesr.202000043] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- John Humphreys
- School of Engineering University of Warwick Coventry CV4 7AL UK
| | - Rong Lan
- School of Engineering University of Warwick Coventry CV4 7AL UK
| | - Shanwen Tao
- School of Engineering University of Warwick Coventry CV4 7AL UK
- Department of Chemical Engineering Monash University Clayton Victoria 3800 Australia
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Ni J, Jing B, Lin J, Lin B, Zhao Z, Jiang L. Effect of rare earth on the performance of Ru/MgAl-LDO catalysts for ammonia synthesis. J RARE EARTH 2018. [DOI: 10.1016/j.jre.2017.07.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Periyasamy S, Gopalakannan V, Viswanathan N. Fabrication of magnetic particles imprinted cellulose based biocomposites for chromium(VI) removal. Carbohydr Polym 2017; 174:352-359. [DOI: 10.1016/j.carbpol.2017.06.029] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 05/28/2017] [Accepted: 06/07/2017] [Indexed: 10/19/2022]
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