塔菲尔方程
MXenes公司
过电位
材料科学
煅烧
化学工程
催化作用
分解水
比表面积
纳米技术
电化学
热液循环
电极
化学
光催化
物理化学
有机化学
工程类
作者
Savan K. Raj,Kinjal B. Patel,Vartika Sharma,Divesh N. Srivastava,Vaibhav Kulshrestha
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2023-10-19
卷期号:37 (21): 16856-16865
标识
DOI:10.1021/acs.energyfuels.3c03245
摘要
The synthesis of efficient hydrogen evolution reaction (HER) electrocatalysts is challenging for industrial-scale hydrogen generation by water splitting. Since their discovery in 2011, MXenes have been extensively investigated for their use in various energy applications as they possess sheet-like morphology that provides more active surface area and facilitates fast ion transfer. This work utilizes a facile hydrothermal treatment to fabricate palladium-modified MXene nanoflowers (nPdNFs). Chemical and morphological analysis of these synthesized nPdNFs shows that nPds have been successfully incorporated in MXene nanoflowers and act as an excellent support material for nPds. The effect of temperature and the thermal decomposition properties of the synthesized material were investigated by calcining it at different temperatures like 200, 300, and 400 °C in a flow of N2 gas. It is observed that nPdNFs-3 (calcined at 300 °C) exhibits maximum active catalytic sites for HER because its porous morphology supports rapid ion transportation. The electrochemical active surface area (ECSA) for all three materials was evaluated, among which nPdNFs-3 demonstrated the highest ECSA value, corroborating its HER activity and depicting a current density of 10 mA cm−2 at a low overpotential of 149 mV, with a Tafel slope of 96 mV dec–1 in 0.5 M H2SO4. The fabricated nanostructured material highlights ceaseless efforts and paves the way for developing MXenes and related materials, which can be employed in the energy conversion and storage sector.
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