Alloyed PdNi hollow nanoparticles as cocatalyst of CdS for improved photocatalytic activity toward hydrogen production |
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| Affiliation: | 1. Henan Engineering Research Center of Resource & Energy Recovery from Waste, Henan University, Kaifeng 475004, PR China;2. Institute of Functional Polymer Composites, Henan University, Kaifeng 475004, PR China;1. CeFEMA, Instituto Superior Técnico, Universidade de Lisboa, 1049–001 Lisbon, Portugal;2. Department of Chemistry, College of Sciences, Koç University, 34450 İstanbul, Turkey;3. Department of Chemistry, Faculty of Science, Atatürk University, 25240 Erzurum, Turkey;1. College of Chemical and Biological Engineering, Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, PR China;2. Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou, 324000, PR China;1. Key Lab of Clean Energy and Green Circulation, Huaibei Normal University, Huaibei, Anhui 235000, People’s Republic of China;2. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China;1. Laboratory of Fine Chemistry and Industry, Henan University, Kaifeng 475004, PR China;2. National Engineering Center of Environmental Photocatalysis, Fuzhou University, Fuzhou 350002, PR China;1. Lab of Fine Chemistry and Industry, Henan University, Kaifeng 475004, PR China;2. Florida Solar Energy Center, University of Central Florida, FL 32922-5703, USA;1. Lab of Fine Chemistry and Industry, Henan University, Kaifeng 475004, PR China;2. Florida Solar Energy Center, University of Central Florida, FL 32922-5703, USA |
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| Abstract: | Photocatalytic hydrogen evolution has been regarded as an efficient method for H2 production, in which the cocatalysts play a crucial role. In this work, two-dimensional (2D) snow-flake CdS was synthesized via a solvothermal method. Pd Ni hollow alloy with different compositions were synthesized by a galvanic replacement method, and decorated on CdS surface. The structural microscopic and spectroscopic analysis demonstrated that the formation of PdNi hollow nanoparticles (HNPs) and the decoration of PdNi HNPs on CdS (PdNi/CdS). Photocatalytic hydrogen evolution reaction was performed under visible light irradiation (λ ≥ 420 nm). Pd1Ni1/CdS exhibited higher photocatalytic H2 generation rate about 54 mmol/h/g with a quantum efficiency of 63.97% at 420 nm, which was 1.7-fold higher than that of Pd/CdS (32.4 mmol/h/g). The high photocatalytic performance for Pd1Ni1/CdS was mainly attributed to the strong interaction between Pd1Ni1 HNPs and CdS, and the formation of unique hollow structure of PdNi alloy with porous nature which provided more active sites for H2 evolution. Additionally, the synergistic effect between Pd and Ni, as well as the 2D morphology of CdS enhance the mobility of photo-generated charge carriers which minimize their recombination in turn enhance the photocurrent and photocatalytic performance of solar water splitting reaction. |
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| Keywords: | PdNi hollow NPs CdS Photocatalyst Hydrogen production |
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