期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 543, 期 -, 页码 273-284出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.02.065
关键词
Active support; Annealing; Synergy; NaBH4 hydrolysis; Hydrogen generation
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2018R1D1A1B07048146]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry Energy (MOTIE) [20174010201160]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20174010201160] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2018R1D1A1B07048146] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Cobalt (Co) nanoparticle supported catalysts have better dispersion and recyclability than unsupported Co. However, the surface chemistry and limited surface area (SA) of supports limit their Co loading which lowers activity. Currently, supports with high SA and functionality which allow high Co loading are been developed. However, a smarter solution would be to develop active supports which can boost the activity of Co, even at low loading. The value of such a support lies in the ability to use low catalyst loading without scarifying activity. Herein, we demonstrate how via a simple annealing process the chemical properties of Fe3O4 and physico-electrical properties of carbon (C) in Fe3O4@C can be effectively combined to prepare an active support for Co. The unique properties of the active Fe3O4@C triggers a synergistic catalytic reaction involving Co, Fe3O4 and C during NaBH4 hydrolysis. Consequently, the hydrogen generation rate (1746 ml g(-1) min(-1)) and activation energy (47.3 kJ mol(-1)) of Fe3O4@C-Co are significantly enhanced compared to reported catalyst even though its Co loading is significantly lower. Additionally, Fe3O4@C-Co is highly recyclable which demonstrates its stability. Our study gives a new perspective on the role supports can play in catalyst design. (C) 2019 Elsevier Inc. All rights reserved.
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