Choudhury Debittree, Das Rubul, Tripathi Anand Kumar, Priyadarshani Divya, Neergat Manoj
Department of Energy Science and Engineering and ‡Center for Research in Nanotechnology & Science, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
Langmuir. 2022 Apr 12;38(14):4341-4350. doi: 10.1021/acs.langmuir.2c00090. Epub 2022 Apr 1.
Hydrogen evolution reaction (HER) are investigated on Pt, Pd, and MoS in a 0.5 M HSO electrolyte in a rotating disk electrode (RDE) configuration in the temperature range of 285-335 K. The reaction is temperature-sensitive on all of the three catalyst surfaces at their respective overpotential ranges. The kinetic parameters (activation enthalpy (Δ), free energy of activation (Δ), and pre-exponential factor ()) toward HER are obtained from the Arrhenius and Eyring relations, and the overall kinetics on the catalyst surfaces is analyzed. Δ for HER is a strong function of the overpotential in the case of both Pt and Pd. On the other hand, the trend in suggests that the electrocatalysis of HER on MoS originates from an increase in entropy factor, perhaps due to the solvent-dipole interaction at the interface. Such analysis is pivotal to the investigation of electrocatalysis of HER, especially on surfaces for which determination of active-site density is not established.
在旋转圆盘电极（RDE）配置下，于285 - 335 K的温度范围内，在0.5 M硫酸电解液中对铂、钯和二硫化钼上的析氢反应（HER）进行了研究。在各自的过电位范围内，该反应在所有三种催化剂表面上都对温度敏感。从阿伦尼乌斯和艾林关系式中获得了析氢反应的动力学参数（活化焓（Δ）、活化自由能（Δ）和指前因子（）），并对催化剂表面的整体动力学进行了分析。在铂和钯的情况下，析氢反应的Δ是过电位的强函数。另一方面，的趋势表明，二硫化钼上析氢反应的电催化作用源于熵因子的增加，这可能是由于界面处的溶剂 - 偶极相互作用所致。这种分析对于析氢反应的电催化研究至关重要，特别是对于尚未确定活性位点密度的表面。
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