Ti3C2Tx/碳化聚丙烯睛纳米纤维@Pd自支撑电极用于高电流密度下的析氢反应

打开文本图片集

中图分类号：TS195.644 文献标志码：A 文章编号：2097-2911-（2025）05-0001-14

Abstract： To address issues such as catalytic site blockage，decreased exposure rate of active sites，and easy delamination of active layers in powdered electrocatalysts during the hydrogen evolution reaction （HER） under high current densities，a hydrophilic and mechanically flexible self- supporting Ti3C2Tx/ carbonized polyacrylonitrile nanofiber （Ti3C2Tx/CPAN） electrode was prepared via a simple vacuum filtration method. By adjusting the ratioof Ti3C2Tx nanosheets to carbon nanofibers，the optimal Ti3C2T× CPAN-2 self-supporting electrode was obtained，exhibitingan overpotential of 514mV and a Tafel slope of 238mV dec'at a current density of 50mAcm-2 . Furthermore， leveraging the reducibility of terminal groups on the surface of Ti3C2Tx nanosheets，Pd was in situ reduced on Ti3C2Tx/CPAN-2 to fabricate a Ti3CTx/CPAN-2@Pd self- supporting electrode.Benefiting from the metal- support interaction between Ti3C2Tx and in situ- generated Pd，which enhanced the inter- facial bonding strength between the support and the metal，the Ti3C2Tx/CPAN-2@Pd electrode demonstrated an improved over-potential of 181mV and a Tafel slope of 130mVdec-1at50mAcm-2 Additionally，it exhibited superior cyclicvoltammetry （CV）stability compared tocommercial Pd-C，confirming its feasibility for stable HER operation under high current densities.

Keywords：self-supporting electrode;MXene nanosheets;hetero-structure; high currentdensity; electrocatalyt ic hydrogen evolution

氢气作为一种可再生、安全、高能量密度及环境友好的绿色能源，是传统化石燃料的潜在替代品，符合社会可持续发展的需要。（剩余20846字）