Ahmed Imtiaz, Biswas Rathindranath, Sharma Rohit, Burman Vishal, Haldar Krishna Kanta
Department of Chemistry, Central University of Punjab, Bathinda, India.
Front Chem. 2023 Feb 23;11:1129133. doi: 10.3389/fchem.2023.1129133. eCollection 2023.
Attractive technology for producing sustainable hydrogen with water electrolyzers was foreseen as one of the most promising ways to meet the increasing demands of renewable resources and electricity storage. Mainly used for the efficient generation of H, water electrolysis involving hydrogen evolution reactions (HERs) depends on efficient and affordable electrocatalysts. Hydrogen is an effective fuel that can be produced by splitting water. Hence, the search for highly efficient HER catalysts is a major challenge as efficient hydrogen evolution catalysts are sought to replace catalysts such as platinum. Here, we describe a low-cost and highly effective electrocatalyst for the proper incorporation of the HER electrocatalyst with low overpotential, effective charge transfer kinetics, low Tafel slope, and good durability. By using a simple hydrothermal approach to produce Co(PO).8HO/CNF, it is possible to attach Co(PO).8HO to the surface of carbon nanofibers (CNFs), which also exhibit remarkable HER activity at an overpotential of 133 mV and produce a current density of 10 mA/cm and a 48 mV/decade for the Tafel slope. Large electrochemical surface areas and easy charge transfer from Co(PO).8HO to the electrode through conductive Co(PO).8HO/CNF composites are the reasons for the improved performance of Co(PO).8HO/CNF.
利用水电解槽生产可持续氢气的诱人技术被视为满足可再生资源和电力存储不断增长需求的最有前景的方法之一。水电解主要用于高效产生氢气，涉及析氢反应（HERs），这取决于高效且经济实惠的电催化剂。氢气是一种可通过水分解产生的有效燃料。因此，寻找高效的析氢催化剂是一项重大挑战，因为人们正在寻求高效的析氢催化剂来替代铂等催化剂。在此，我们描述了一种低成本且高效的电催化剂，该催化剂用于合适地掺入析氢电催化剂，具有低过电位、有效的电荷转移动力学、低塔菲尔斜率和良好的耐久性。通过使用简单的水热法制备Co(PO)₃·8H₂O/CNF，可以将Co(PO)₃·8H₂O附着在碳纳米纤维（CNF）表面，该复合材料在133 mV的过电位下也表现出显著的析氢活性，产生的电流密度为10 mA/cm²，塔菲尔斜率为48 mV/decade。较大的电化学表面积以及通过导电的Co(PO)₃·8H₂O/CNF复合材料从Co(PO)₃·8H₂O到电极的容易电荷转移是Co(PO)₃·8H₂O/CNF性能提高的原因。
