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Study on synthesis of NaFe x Cr y （SO4）2（OH）6 and their electrochemical properties
Received date: 2022-09-22
Online published: 2023-08-25
With the excessive consumption of energy and environmental pollution at home and abroad，the search for efficient，clean and sustainable energy sources is a top priority now.Less research has been carried out on the easily synthesised Na-jarosite in the oxygen precipitation reaction（OER）.Therefore，four different molar ratios ［n（Fe3+）/n（Cr3+）］ of chromium-doped Na-jarosite［NaFe x Cr y （SO4）2（OH）6］ catalytic materials were synthesized by hydrothermal method.The structure and properties were characterised using SEM，XRD，Raman and electrochemical methods.The results showed that Cr3+ was successfully doped into the lattice of Na-jarosite，and the size of the Na-jarosite particles was decreased with the increasing amount of Cr3+ doping.In an electrolyte of 1 mol/L KOH，the OER catalytic performance of the sample of n（Fe3+）/n（Cr3+） of 1∶1 was the most excellent.When the current density was 10 mA/cm2，the overpotential was 370 mV，the Tafel slope was 92.99 mV/dec and the electrochemical double layer capacitance（Cdl） was 10.94 mF/cm2.
CHEN Junxue , MO Jianxin , ZHOU Zhiyu , LI Zhonglin , WANG Ding , LI Yuping , HU Yongjun , JIANG Xuexian , LI Yibing . Study on synthesis of NaFe x Cr y （SO4）2（OH）6 and their electrochemical properties[J]. Inorganic Chemicals Industry, 2023 , 55(8) : 71 -76 . DOI: 10.19964/j.issn.1006-4990.2022-0569
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