Suragtkhuu Selengesuren, Sunderiya Suvdanchimeg, Purevdorj Solongo, Bat-Erdene Munkhjargal, Sainbileg Batjargal, Hayashi Michitoshi, Bati Abdulaziz S R, Shapter Joseph G, Davaasambuu Sarangerel, Batmunkh Munkhbayar
Department of Chemistry, Division of Natural Sciences, School of Arts and Sciences, National University of Mongolia Ulaanbaatar 14200 Mongolia
Queensland Micro- and Nanotechnology Centre, School of Environment and Science, Griffith University Nathan Queensland 4111 Australia
Nanoscale Adv. 2022 Dec 5;5(2):349-355. doi: 10.1039/d2na00782g. eCollection 2023 Jan 18.
Atomically thin TiCT (MXene) nanosheets with rich termination groups, acting as active sites for effective functionalization, are used as an efficient solid support to host rhenium (Re) nanoparticles for the electrocatalytic hydrogen evolution reaction (HER). The newly designed electrocatalyst - Re nanoparticles anchored on TiCT MXene nanosheets (Re@TiCT ) - exhibited promising catalytic activity with a low overpotential of 298 mV to achieve a current density of 10 mV cm, while displaying excellent stability. In comparison, the pristine TiCT MXene requires higher overpotential of 584 mV to obtain the same current density. After being stored under ambient conditions for 30 days, Re@TiCT retained 100% of its initial catalytic activity for the HER, while the pristine TiCT retained only 74.8% of its initial value. According to our theoretical calculations using density functional theory, dual Re anchored MXene (Re@TiCT ) exhibits a near-zero value of Gibbs free energy (Δ * = -0.06 eV) for the HER, demonstrating that the presence of Re significantly enhances the electrocatalytic activity of MXene nanosheets. This work introduces a facile strategy to develop an effective electrocatalyst for electrocatalytic hydrogen production.
具有丰富端基的原子级薄TiCT（MXene）纳米片作为有效功能化的活性位点，被用作承载铼（Re）纳米颗粒的高效固体载体，用于电催化析氢反应（HER）。新设计的电催化剂——锚定在TiCT MXene纳米片上的Re纳米颗粒（Re@TiCT ）——表现出有前景的催化活性，在低过电位298 mV时实现了10 mA cm的电流密度，同时显示出优异的稳定性。相比之下，原始的TiCT MXene需要584 mV的更高过电位才能获得相同的电流密度。在环境条件下储存30天后，Re@TiCT 对HER保留了100%的初始催化活性，而原始的TiCT MXene仅保留了其初始值的74.8%。根据我们使用密度泛函理论的理论计算，双Re锚定的MXene（Re@TiCT ）对HER表现出接近零的吉布斯自由能值（Δ * = -0.06 eV），表明Re的存在显著增强了MXene纳米片的电催化活性。这项工作引入了一种简便的策略来开发用于电催化制氢的有效电催化剂。
