Effect of Ce doping on CoFe layered double hydroxide for heterogeneous water oxidation Parul Aggarwal IISER Bhopal, India The massive use of fossil fuels has resulted in increasing energy crisis and environmental pollution. Electrocatalytic water oxidation (WO) has provided a promising approach to generate hydrogen which is a clean and renewable energy carrier. The primary bottleneck for WO is oxygen evolution reaction (OER) wherein a high overpotential is required to drive the reaction due to sluggish kinetics of the reaction which involves 4e - /4H + transfer. 1-3 The proposed research aims to develop first row transition metal 4,5 based layered double hydroxide (LDH) for heterogeneous WO. LDH is a class of layered ionic solid structure which consist of positively charged brucite-like layers and anions or neutral molecules in between the layers having electrostatic interaction. Herein, a series of LDH using earth-abundant first row transition metals such as Co/Fe-LDH was synthesised. The key findings of this work include: (i) Utilization of cost effective first row transition metals for WO in alkaline medium. (ii) Higher ionic radius of Ce 4+ than Fe 3+ /Co 2+ alters the topology of the layer and bring lattice defects which can increase the active sites for WO. (iii) LDH having varying interlamellar space for the reactants to get adsorbed on the surface. Hence, this study for water oxidation will open a new and cheap design strategy to meet the goal of global-scale clean energy production References 1. Suen, N. T.; Hung, S. F.; Quan, Q.; Zhang, N.; Xu, Y. J.; Chen, H. M. Soc. Rev. 2017 , 46 , 337−365. 2. Hunter, B. M.; Gray, H. B.; Muller, A. M. Rev. 2016 , 116 , 14120−14136. 3. Tahir, M.; Pan, L.; Idrees, F.; Zhang, X.; Wang, L.; Zou, J.-J.; Wang, Z. L. Nano Energy 2017 , 37 , 136−157. 4. Park, S.; Shao, Y.; Liu, J.; Wang, Y. Energy Environ. Sci. 2012 , 5 , 9331−9344. 5. Singh, A.; Spiccia, L. Chem. Rev. 2013 , 257 , 2607−2622.
P01
© The Author(s), 2022
Made with FlippingBook Learn more on our blog