A NiCoP nanocluster-anchored porous Ti3C2Tx monolayer as high performance hydrogen evolution reaction electrocatalysts.
A NiCoP nanocluster-anchored porous Ti3C2Tx monolayer as high performance hydrogen evolution reaction electrocatalysts.
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DOI：
10.1039/d1nr02601a
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发表时间：
2021-08
期刊：
影响因子：
6.7
通讯作者：
Sung-Min Kang;Minjun Kim;J. Lee;Shiyu Xu;N. Clament Sagaya Selvam;P. Yoo
中科院分区：
文献类型：
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作者：
Sung-Min Kang;Minjun Kim;J. Lee;Shiyu Xu;N. Clament Sagaya Selvam;P. Yoo
MXene具有高的导电性、表面亲水性、丰富的表面官能团以及与其他材料合理杂化的潜力，是无贵金属析氢反应（HER）电催化剂的理想候选材料。本文合成了一种新型的多孔单层Ti3C2Tx@NiCoP（P-Ti 3C 2 Tx @NiCoP）纳米结构，其具有均匀分布的Ti 3C 2 Tx化合物，以提高电荷转移能力和电催化活性。在实验中，H2 O2-利用氧化形成了高度介孔结构，具有最大化的单层MXenes作为载体的表面积。随后的溶剂热过程，然后进行磷化，使得能够成功地锚定高度HER活性的NiCoP纳米团簇到大量暴露的终端边缘的P-Ti 3C 2 Tx支持。P-Ti 3C 2 Tx纳米片的结构孔隙率在为嵌入催化活性物质创造额外空间同时稳定地赋予高电导率以加速电荷转移到NiCoP纳米团簇中方面发挥了重要作用。通过结构修饰和有效的杂化，P-Ti 3C 2 Tx @NiCoP显示出高度增强的HER活性，在0.5 M H2SO 4和1.0 M KOH中，在-10 mA cm-2的电流密度下，分别具有115和101 mV的显著较低的过电位，沿着显示出超过60 h的长期稳定性。因此，我们设计结构改性的Ti 3C 2 Tx和与其他电催化活性物质杂交的方法将作为实施基于Ti 3C 2 Tx的异质纳米结构的坚实平台，以实现下一代能量转换应用中的最先进性能。
MXenes have received much attention as promising candidates for noble metal-free hydrogen evolution reaction (HER) electrocatalysts due to their high electrical conductivity, surface hydrophilicity, abundant surface functional groups, and great potential for rational hybridization with other materials. Herein, a novel porous monolayered-Ti3C2Tx@NiCoP (P-Ti3C2Tx@NiCoP) nanostructure was synthesized with uniform distribution of bimetallic compounds for improved charge transfer capability and electrocatalytic activity. In experiments, H2O2-utilized oxidation formed a highly mesoporous structure with a maximized surface area of monolayered MXenes as the support. A subsequent solvothermal process followed by phosphidation enabled successful anchoring of highly HER-active NiCoP nanoclusters onto abundantly exposed terminal edges of the P-Ti3C2Tx support. The structural porosity of the P-Ti3C2Tx nanoflakes played an important role in creating additional room for embedding catalytically active species while stably imparting high electrical conductivity to accelerate charge transfer to NiCoP nanoclusters. With structural modification and effective hybridization, P-Ti3C2Tx@NiCoP showed highly enhanced HER activity with significantly lower overpotentials of 115 and 101 mV at a current density of -10 mA cm-2 in 0.5 M H2SO4 and 1.0 M KOH, respectively, along with showing long-term stability over 60 h. As such, our approach of designing structurally modified-Ti3C2Tx and hybridizing with other electrocatalytically active species would function as a solid platform for implementing Ti3C2Tx-based hetero-nanostructures to achieve state-of-the-art performance in next-generation energy conversion applications.