负载Pt纳米颗粒的掺氮碳化钼微球催化电解水析氢

Nitrogen-doped molybdenum carbide microflower loaded Ptnanoparticles for catalytic electrolysis of water for hydrogen production

电解水制氢是极具发展应用前景的绿色技术,使用低成本碳材料负载贵金属作为催化剂基底,是减小析氢催化剂贵金属负载量和优化其性能的有效手段。采用配位聚合法,通过调控pH得到了由纳米片自组装形成的具有高比表面积的前驱体微球,再通过离子交换和高温焙烧将Pt纳米颗粒均匀负载在氮掺杂碳化钼表面,制备出了Pt/N-Mo_(2)C NFs。因Pt纳米颗粒具有多层级结构的N-Mo_(2)C上的高度分散以及Pt与N-Mo_(2)C基底之间的协同作用,它展现出十分优异的析氢性能。Pt/N-Mo_(2)C NFs拥有较低的过电位(44 mV/η_(10)和137 mV/η_(100)),和Tafel斜率为46.2 mV/dec,同时具有良好的稳定性。研究结果对于设计低负载量的贵金属催化剂具有一定的借鉴意义。

Hydrogen production from electrolytic water is a promising green technology,and the use of low-cost carbon materials loaded with noble metals as catalyst substrates is an effective means to reduce the noble metal loading and optimize the performance of hydrogen precipitation catalysts.Herein,Pt/N-Mo_(2)C NFs were prepared by using ligand polymerization method to obtain precursor microspheres with high specific surface area formed by the self-assembly of nanosheets through pH regulation,and then Pt nanoparticles were uniformly loaded on the surface of nitrogen-doped molybdenum carbide by ion exchange and high temperature roasting.Due to the high dispersion of Pt nanoparticles on N-Mo_(2)C with multilayered structure and the synergistic effect between Pt and N-Mo_(2)C substrates,it exhibits very good hydrogen evolution reaction performance.The Pt/N-Mo_(2)C NFs possess low overpotentials(44 mV/η_(10)and 137 mV/η_(100)),and Tafel slope of 46.2 mV/dec,as well as good stability.The results of this paper have implications for the design of low loading noble metal catalysts.