Citation: Xinwen ZHOU, Xiaoyu SHEN, Ce FU, Pan WANG, Luoyi YAN, Zheng CHENG, Guixian TIAN, Ronghua ZHANG. Effects of synthesis and structural regulation of Ir and IrPd catalysts on methanol oxidation performance[J]. Chinese Journal of Inorganic Chemistry, ;2024, 40(2): 412-420. doi: 10.11862/CJIC.20230288 shu

Effects of synthesis and structural regulation of Ir and IrPd catalysts on methanol oxidation performance

Xinwen ZHOU ^{1, 2,,} ,
Xiaoyu SHEN ¹ ,
Ce FU ¹ ,
Pan WANG ¹ ,
Luoyi YAN ¹ ,
Zheng CHENG ¹ ,
Guixian TIAN ¹ ,
Ronghua ZHANG ^{1, 2,,}

1.
College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China
2.
Hubei Three Gorges Laboratory, Yichang, Hubei 443002, China

Corresponding author: Xinwen ZHOU, xwzhou@ctgu.edu.cn Ronghua ZHANG, rhzhang@ctgu.edu.cn
Received Date: 2 August 2023
Revised Date: 5 December 2023

Figures(6)

Using triblock copolymer P123 (poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide), PEO₂₀-PPO₇₀-PEO₂₀) as reducing agent and protective agent, the effects of hydrothermal and solvothermal methods on the synthesis of pure Ir and IrPd alloy catalysts and their electrocatalytic oxidation of methanol (MOR) were compared. For pure Ir catalyst, solvothermal method can better promote the reduction of Ir precursor under the same condi- tions. For IrPd alloy catalysts, core-shell structure products (IrPd-S) with rich Ir-surface but low MOR activity can be prepared by solvothermal method. The different atomic ratios (IrPd, Ir2Pd, IrPd2) obtained by hydrothermal reaction have smaller particle sizes and more uniform distribution of elements. Among them, IrPd catalyst with ratio of 1∶1 (IrPd-H) had the highest MOR electrocatalytic activity. These results show that the structure, surface composition and electrocatalytic activity of pure Ir and IrPd alloy catalysts can be effectively adjusted by adjusting the type of solvent and the structural induction of P123.
- structural regulation,
- hydrothermal synthesis,
- IrPd alloy,
- triblock copolymer,
- oxidation of methanol
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