Environmental friendly synthesis of hierarchical mesoporous platinum nanoparticles templated by fucoidan biopolymer for enhanced hydrogen evolution reaction
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第11期
论文作者：Seung Man Lim Kyunglee Kang Hongje Jang Jung Tae Park
文章页码：185 - 190
摘 要：Researching novel hydrogen evolution reaction（HER） catalysts with enhanced electrocatalytic activity,excellent stability, and cost-efficiency is of great significance for the large-scale hydrogen production from industrial electrolysis technology. We report the preparation of hierarchical mesoporous-Pt nanoparticles（HM-Pt NPs） with coral-like rough surface morphologies using environmental friendly and biocompatible fucoidan（Fu） biopolymer as a surface engineering compound and its application to electrocatalysts for water-splitting. The designed HM-Pt NPs yields better mass activity of electrocatalysts compared to a commercial Pt/C. HM-Pt NPs showed an overpotential of 33 mV at 10 mA cm-2 for the HER in 0.5 MH2SO4,which was highly comparable to that of the commercial Pt/C catalysts（29 mV）. However, the amount of HM-Pt NPs loaded in glassy carbon electrode（0.033 mg mL-1） was approximately 20 times lower than that of the commercial Pt/C(0.64 mg mL-1. The HM-Pt NPs also maintained high catalytic stability with a consistent HER current density after 1000 continuous operation. The excellent HER performance is attributed to the improved electrochemical surface area, highly porous structure, and good surface wettability of the HM-Pt NPs, which results in enhanced electrocatalytic activity, decreased resistance at the electrode/electrolyte interface, and facile penetration of the electrolytes inside the electrode.
Seung Man Lim1，Kyunglee Kang2，Hongje Jang2，Jung Tae Park1
1. Department of Chemical Engineering, Konkuk University2. Department of Chemistry, Kwangwoon University
摘 要：Researching novel hydrogen evolution reaction（HER） catalysts with enhanced electrocatalytic activity,excellent stability, and cost-efficiency is of great significance for the large-scale hydrogen production from industrial electrolysis technology. We report the preparation of hierarchical mesoporous-Pt nanoparticles（HM-Pt NPs） with coral-like rough surface morphologies using environmental friendly and biocompatible fucoidan（Fu） biopolymer as a surface engineering compound and its application to electrocatalysts for water-splitting. The designed HM-Pt NPs yields better mass activity of electrocatalysts compared to a commercial Pt/C. HM-Pt NPs showed an overpotential of 33 mV at 10 mA cm-2 for the HER in 0.5 MH2SO4,which was highly comparable to that of the commercial Pt/C catalysts（29 mV）. However, the amount of HM-Pt NPs loaded in glassy carbon electrode（0.033 mg mL-1） was approximately 20 times lower than that of the commercial Pt/C(0.64 mg mL-1. The HM-Pt NPs also maintained high catalytic stability with a consistent HER current density after 1000 continuous operation. The excellent HER performance is attributed to the improved electrochemical surface area, highly porous structure, and good surface wettability of the HM-Pt NPs, which results in enhanced electrocatalytic activity, decreased resistance at the electrode/electrolyte interface, and facile penetration of the electrolytes inside the electrode.
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