Anchoring isolated Pd atoms on Ti3C2Tx MXene with boosted kinetics for alkaline hydrogen evolution
Anchoring isolated Pd atoms on Ti3C2Tx MXene with boosted kinetics for alkaline hydrogen evolution
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DOI：
10.1016/j.apsusc.2023.158809
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发表时间：
2023-10
影响因子：
6.7
通讯作者：
Jiang Zhu;Lulu An;Xiangyang Li;Kevin Iputera;Ruilin Liu;Jinlong Yang;De-Ming Wang;Xu Zhao
中科院分区：
文献类型：
--
作者：
Jiang Zhu;Lulu An;Xiangyang Li;Kevin Iputera;Ruilin Liu;Jinlong Yang;De-Ming Wang;Xu Zhao
Developing efficient catalysts with accelerated kinetics towards alkaline hydrogen evolution reaction (HER) is of vital importance but still challenging owing to the sluggish processes, including water adsorption, water dissociation, and hydrogen adsorption. Herein, we presented a facile strategy to anchor isolated Pd atoms on Ti3C2TxMXene (Pd1-Ti3C2Tx) to simultaneously regulate the adsorption of intermediates for accelerated HER kinetics under alkaline conditions. Mechanism studies suggested that Pd1-Ti3C2Txcould effectively strengthen the H2O adsorption and dissociation owing to the strong electron interaction between O 2porbital in H2O and Pd 3dorbital in Pd1-Ti3C2Tx. Meanwhile, the hydrogen adsorption on Ti3C2TxMXene could be further optimized due to the downshiftedp-band center of surface O sites caused by the anchoring of Pd atoms. Accordingly, Pd1-Ti3C2Txshowed a much lower overpotential and smaller Tafel slope in comparison with that of pure Ti3C2Tx. This work provides a fundamental understanding of designing electrocatalysts with regulated kinetics through the single-atom-modulation strategy.
