Cheng Yapeng, Fan Meiling, Lin Weiran, Zhang Zhiwei, Zhang Haining
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology Nr. 122 Luoshi Rd Wuhan 430070 China
The Fundamental Industry Training Center, Tsinghua University Beijing 100084 China.
RSC Adv. 2020 Jan 3;10(2):930-937. doi: 10.1039/c9ra09662k. eCollection 2020 Jan 2.
Design and synthesis of efficient electrocatalysts with low usage of precious metal and of high stability are essential for their practical applications in hydrogen evolution reactions. In this work, we synthesize an electrocatalyst through the deposition of platinum nanoparticles on defect-rich nitrogen-doped hollow carbon derived from surface-attached poly(4-vinylpyridine) monolayers. The platinum nanoparticles with an average diameter of about 1.8 nm are well dispersed on the outer surface of the pre-synthesized carbon material and the platinum loading is about 8.6 wt%. The mass activity of the as-synthesized catalyst under an overpotential of 55 mV is about 5.0 A mg , about 4.93 times higher than that of commercial Pt/C catalysts. Moreover, the synthesized catalyst is also more electrochemically stable than commercial Pt/C catalysts as evidenced by continuous cyclic voltammetry and chronoamperometric response measurements.
设计并合成低贵金属用量且高稳定性的高效电催化剂对其在析氢反应中的实际应用至关重要。在这项工作中，我们通过将铂纳米颗粒沉积在由表面附着的聚（4-乙烯基吡啶）单分子层衍生的富含缺陷的氮掺杂空心碳上，合成了一种电催化剂。平均直径约为1.8 nm的铂纳米颗粒很好地分散在预合成碳材料的外表面，铂负载量约为8.6 wt%。在55 mV过电位下，合成催化剂的质量活性约为5.0 A mg，比商业Pt/C催化剂高约4.93倍。此外，连续循环伏安法和计时电流响应测量表明，合成的催化剂在电化学方面也比商业Pt/C催化剂更稳定。
