A CdS quantum dots-sensitized porphyrin-based MOFs for hydrogen evolution reaction in acid media
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A CdS quantum dots-sensitized porphyrin-based MOFs for hydrogen evolution reaction in acid media Yan Zhou1, Yimin Luo1, and Junmin Wan1,2,* 1
National Engineering Lab of Textile Fiber Materials & Processing Technology, Zhejiang Sci-Tech University, Hangzhou 310018, People’s Republic of China 2 State Key Laboratory of advanced Textiles Materials and Manufacture Technology, MOE, Zhejiang Sci-Tech University, Hangzhou 310018, People’s Republic of China
Received: 21 June 2020
ABSTRACT
Accepted: 8 October 2020
Exploiting a renewable and inexpensive electrochemical catalyst for hydrogen evolution reaction (HER) has attracted great attentions recently. In this study, a MOF catalyst CdS@PCN-224(Ni) was fabricated using CdS quantum dots (QDs) and unique PCN-224(Ni) by a simple hydrothermal method. Due to synergetic effect of the CdS QDs and bimetallic porphyrin MOF structure, the special catalyst showed a great electrocatalytic activity with a low overpotential of 120 mV and a current density of 10 mA/cm2 with a Tafel slope of 90.8 mV/dec, which is approaching to that of the Pt/C (42.8 mV/dec). The double-layer capacitances (Cdl) of CdS@PCN-224(Ni) are 9.75 mF/cm2 which is distinctly superior to that of the PCN-224 (2.33 mF/cm2). Even more to the point, this innovative electrochemical catalyst has a wonderful durability in acid solution, which means it could reach a sustainable utilization. In conclusion, the high activity and low-cost catalyst could be a promising candidate for HER devices in acid media.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction Nowadays, the over-consumption of fossil fuels (coal, oil, natural gas, etc.) has led to some severe environmental problems like greenhouse effect especially [1]. Hydrogen energy is one of the suitable candidates to take place of non-renewable energy [2]. Water electrolysis can release hydrogen without carbon dioxide and provide a feasible solution to efficiently produce hydrogen [3]. Noble metals, such as platinum, have high catalytic efficiency,
but cannot be widely applied in industrial production because of its low reserves and expensive cost [4]. Porphyrin-based metal organic frameworks (MOFs) have been successfully synthesized in recent years [5]. They have biological and chemical stability of porphyrin structure, great specific surface area and plentiful pores of metal organic frameworks, hence can probably become a promising candidate for catalyst in hydrogen evolution reaction [6]. Porous Coordination Network (PCN) materials were formed
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https://doi.org/10.1007/s10854-020-04634-7
J Mater Sci: Mater Electron
by cooperation of porphyrin with zirconium ions as coordination center (e.g., PCN-222 [7], PCN223 [8], PCN-224 [9], PCN-600 [5]). By a solvothermal method, the zirconium chloride and nickel porphyrin organic ligands can be firmly combined to obtain a cube-like porous metal organic framework PCN-224(Ni) [10]. It has large BET area (2600 m2g-1)
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