It is an effective strategy to enhance platinum(Pt)utilization and lower the catalyst cost by loading Pt on a self-supported electrode.In this work,we employ a molybdenum(Mo)mesh both as the source of Mo and the self-...It is an effective strategy to enhance platinum(Pt)utilization and lower the catalyst cost by loading Pt on a self-supported electrode.In this work,we employ a molybdenum(Mo)mesh both as the source of Mo and the self-supported electrode.Through a successful combination of the spray and calcination methods,Pt is efficiently loaded onto the self-supported molybdenum dioxide(MoO_(2))electrode,achieving a Pt loading content of only∼0.67 wt%.Simultaneously,three-dimensional(3D)MoO_(2)exhibits a structure comprised of nanosheets,each possessing perforations.As expected,the prepared electrocatalyst demonstrates exceptional performance,manifesting an overpotential of 26.8 mV at−10 mA cm^(-2),a Tafel slope of 59.2 mV dec^(-1),and a noteworthy durability of over 240 hours.Both experimental studies and theoretical calculations affirm that the catalyst’s outstanding performance stems from the strong interaction between Pt and MoO_(2),the distinctive structure of MoO_(2)with perforated nanosheets,and the self-supporting characteristics of the electrode.This work introduces an efficient method for constructing self-supporting heterojunctions,thereby advancing the development of electrocatalytic hydrogen evolution.展开更多
基金supported by the National Natural Science Foundation of China(No.52374395)the Program for Science&Technology Innovation Talents in Universities of Henan Province(No.22HASTIT008,24HASTIT006)+2 种基金the Natural Science Foundations of Henan Province(No.222300420502,242300420045)the Programs for Science and Technology Development of Henan Province(No.242102240066)the Key Scientific Research Projects of University in Henan Province(No.23B430002).
文摘It is an effective strategy to enhance platinum(Pt)utilization and lower the catalyst cost by loading Pt on a self-supported electrode.In this work,we employ a molybdenum(Mo)mesh both as the source of Mo and the self-supported electrode.Through a successful combination of the spray and calcination methods,Pt is efficiently loaded onto the self-supported molybdenum dioxide(MoO_(2))electrode,achieving a Pt loading content of only∼0.67 wt%.Simultaneously,three-dimensional(3D)MoO_(2)exhibits a structure comprised of nanosheets,each possessing perforations.As expected,the prepared electrocatalyst demonstrates exceptional performance,manifesting an overpotential of 26.8 mV at−10 mA cm^(-2),a Tafel slope of 59.2 mV dec^(-1),and a noteworthy durability of over 240 hours.Both experimental studies and theoretical calculations affirm that the catalyst’s outstanding performance stems from the strong interaction between Pt and MoO_(2),the distinctive structure of MoO_(2)with perforated nanosheets,and the self-supporting characteristics of the electrode.This work introduces an efficient method for constructing self-supporting heterojunctions,thereby advancing the development of electrocatalytic hydrogen evolution.
