The restacking and oxidizable nature of vanadium-based carbon/nitride(V_(2)C-MXene)poses a significant challenge.Herein,tellurium(Te)-doped V_(2)C/V_(2)O_(3) electrocatalyst is constructed via mild H_(2)O_(2) oxidatio...The restacking and oxidizable nature of vanadium-based carbon/nitride(V_(2)C-MXene)poses a significant challenge.Herein,tellurium(Te)-doped V_(2)C/V_(2)O_(3) electrocatalyst is constructed via mild H_(2)O_(2) oxidation and calcination treatments.Especially,this work rationally exploits the inherent easy oxidation characteristic associated with MXene to alter the interfacial information,thereby obtaining stable self-generated vanadium-based heterointerfaces.Meanwhile,the microetching effect of H_(2)O_(2) creates numerous pores to address the restacking issues.Besides,Te element doping settles the issue of awkward levels of absorption/desorption ability of intermediates.The electrocatalyst obtains an unparalleled hydrogen evolution reaction and oxygen evolution reaction with the overpotential of 83.5 and 279.8 mV at−10 and 10 mA cm^(−2),respectively.In addition,the overall water-splitting device demonstrates a low cell voltage of 1.41 V to obtain 10 mA cm^(−2).Overall,the inherent drawbacks of MXene can be turned into benefits based on the planning strategy to create these electrocatalysts with desirable reaction kinetics.展开更多
基金NSF of China,Grant/Award Number:22205125Youth Special Program for Innovation of Science and Technology,Grant/Award Number:QNZX202307Program for Innovative Research Team(in Science and Technology)at the University of Henan Province(IRTSTHN)。
文摘The restacking and oxidizable nature of vanadium-based carbon/nitride(V_(2)C-MXene)poses a significant challenge.Herein,tellurium(Te)-doped V_(2)C/V_(2)O_(3) electrocatalyst is constructed via mild H_(2)O_(2) oxidation and calcination treatments.Especially,this work rationally exploits the inherent easy oxidation characteristic associated with MXene to alter the interfacial information,thereby obtaining stable self-generated vanadium-based heterointerfaces.Meanwhile,the microetching effect of H_(2)O_(2) creates numerous pores to address the restacking issues.Besides,Te element doping settles the issue of awkward levels of absorption/desorption ability of intermediates.The electrocatalyst obtains an unparalleled hydrogen evolution reaction and oxygen evolution reaction with the overpotential of 83.5 and 279.8 mV at−10 and 10 mA cm^(−2),respectively.In addition,the overall water-splitting device demonstrates a low cell voltage of 1.41 V to obtain 10 mA cm^(−2).Overall,the inherent drawbacks of MXene can be turned into benefits based on the planning strategy to create these electrocatalysts with desirable reaction kinetics.
