Highly Dispersed Ru Nanoparticles on Boron-Doped Ti3C2Tx (MXene) Nanosheets for Synergistic Enhancement of Electrocatalytic Hydrogen Evolution
Author(s)
Bat-Erdene, Munkhjargal
Batmunkh, Munkhbayar
Sainbileg, Batjargal
Hayashi, Michitoshi
Bati, Abdulaziz SR
Qin, Jiadong
Zhao, Huijun
Zhong, Yu Lin
Shapter, Joseph G
Griffith University Author(s)
Year published
2021
Metadata
Show full item recordAbstract
2D-layered materials have attracted increasing attention as low-cost supports for developing active catalysts for the hydrogen evolution reaction (HER). In addition, atomically thin Ti3C2Tx (MXene) nanosheets have surface termination groups (Tx: -F, -O, and -OH), which are active sites for effective functionalization. In this work, heteroatom (boron)-doped Ti3C2Tx (MXene) nanosheets are developed as an efficient solid support to host ultrasmall ruthenium (Ru) nanoparticles for electrocatalytic HER. The quantum-mechanical first-principles calculations and electrochemical tests reveal that the B-doping onto 2D MXene nanosheets ...
View more >2D-layered materials have attracted increasing attention as low-cost supports for developing active catalysts for the hydrogen evolution reaction (HER). In addition, atomically thin Ti3C2Tx (MXene) nanosheets have surface termination groups (Tx: -F, -O, and -OH), which are active sites for effective functionalization. In this work, heteroatom (boron)-doped Ti3C2Tx (MXene) nanosheets are developed as an efficient solid support to host ultrasmall ruthenium (Ru) nanoparticles for electrocatalytic HER. The quantum-mechanical first-principles calculations and electrochemical tests reveal that the B-doping onto 2D MXene nanosheets can largely improve the intermediate H* adsorption kinetics and reduce the charge-transfer resistance toward the HER, leading to increased reactivity of active sites and favorable electrode kinetics. Importantly, the newly designed electrocatalyst based on Ru nanoparticles supported on B-doped MXene (Ru@B–Ti3C2Tx) nanosheets shows a remarkable catalytic activity with low overpotentials of 62.9 and 276.9 mV to drive 10 and 100 mA cm−2, respectively, for the HER, while exhibiting excellent cycling stabilities. Moreover, according to the theoretical calculations, Ru@B–Ti3C2Tx exhibits a near-zero value of Gibbs free energy (ΔGH* = 0.002 eV) for the HER. This work introduces a facile strategy to functionalize MXene for use as a solid support for efficient electrocatalysts.
View less >
View more >2D-layered materials have attracted increasing attention as low-cost supports for developing active catalysts for the hydrogen evolution reaction (HER). In addition, atomically thin Ti3C2Tx (MXene) nanosheets have surface termination groups (Tx: -F, -O, and -OH), which are active sites for effective functionalization. In this work, heteroatom (boron)-doped Ti3C2Tx (MXene) nanosheets are developed as an efficient solid support to host ultrasmall ruthenium (Ru) nanoparticles for electrocatalytic HER. The quantum-mechanical first-principles calculations and electrochemical tests reveal that the B-doping onto 2D MXene nanosheets can largely improve the intermediate H* adsorption kinetics and reduce the charge-transfer resistance toward the HER, leading to increased reactivity of active sites and favorable electrode kinetics. Importantly, the newly designed electrocatalyst based on Ru nanoparticles supported on B-doped MXene (Ru@B–Ti3C2Tx) nanosheets shows a remarkable catalytic activity with low overpotentials of 62.9 and 276.9 mV to drive 10 and 100 mA cm−2, respectively, for the HER, while exhibiting excellent cycling stabilities. Moreover, according to the theoretical calculations, Ru@B–Ti3C2Tx exhibits a near-zero value of Gibbs free energy (ΔGH* = 0.002 eV) for the HER. This work introduces a facile strategy to functionalize MXene for use as a solid support for efficient electrocatalysts.
View less >
Journal Title
Small
Note
This publication has been entered in Griffith Research Online as an advanced online version.
Subject
Nanotechnology
Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Chemistry, Physical