NaFe x Cr y （SO4）2（OH）6的合成及电化学性能研究

doi:10.19964/j.issn.1006-4990.2022-0569

Abstract

Abstract:

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（C_dl） was 10.94 mF/cm².

Key words: jarosite, Cr-doped, non-precious metal catalysts, oxygen evolution reaction

CLC Number:

TQ152

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.

Figures/Tables 9

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Study on synthesis of NaFe _x Cr _y （SO₄）₂（OH）₆ and their electrochemical properties

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Study on synthesis of NaFe x Cr y （SO4）2（OH）6 and their electrochemical properties