铂/铜合金催化剂的制备及其电解水析氢性能研究

摘要/Abstract

摘要： 面对化石能源危机问题,清洁高效的氢能源受到人们的广泛关注,电解水制氢成为新的研究热点。本文主要围绕铂/铜合金催化剂的合成、表征及其电解水析氢催化应用展开研究。采用溶剂热法合成铂/铜合金,通过XRD、SEM、TEM、EDS、XPS等表征铂/铜合金的组成结构和微观形貌,对铂/铜合金的构效关系进行探索。利用电化学测试系统测得铂/铜合金不同条件下的析氢催化性能。在0.5 mol/L H₂SO₄中,铂/铜合金的起始过电位为20.3 mV(10 mA·cm^-2时),塔菲尔斜率为37.56 mV·dec^-1;在1 mol/L 磷酸缓冲盐溶液(PBS)中,铂/铜合金的起始过电位为35.0 mV(10 mA·cm^-2时),塔菲尔斜率为52.12 mV·dec^-1;在1 mol/L KOH中,铂/铜合金的起始过电位为25.3 mV(10 mA·cm^-2时),塔菲尔斜率为36.82 mV·dec^-1。对比发现,铂/铜合金在酸性电解质中展现出更为优异的催化性能。而且,进一步实验表明铂/铜合金催化剂在酸性电解质中具有高的电催化活性面积(30.83 cm²)和良好的循环稳定性。

关键词: 催化剂, 铂/铜合金, 溶剂热法, 电解水, 析氢反应

Abstract: In the face of the fossil energy crisis, hydrogen energy has attracted widespread attention because of its cleanness and efficiency. Therefore, hydrogen production by water electrolysis has become a new research upsurge. This research mainly focused on the synthesis, characterization and application of Pt/Cu alloy catalyst. Pt/Cu alloy was synthesized by solvothermal method. The composition, structure and morphology of Pt/Cu alloy were characterized by XRD, SEM, TEM, EDS, XPS, etc, to explore the relationship between its structure and performance. The catalytic performance of Pt/Cu alloy under different electrolyte were tested by electrochemical test system. In 0.5 mol/L H₂SO₄, the initial overpotential of Pt/Cu alloy is 20.3 mV (at 10 mA·cm^-2) and the Tafel is 37.56 mV·dec^-1. At the same time, the initial overpotential and Tafel of Pt/Cu alloy are 35.0 mV (at 10 mA·cm^-2) and 52.12 mV·dec^-1respectively in 1 mol/L phosphate buffered saline (PBS). In addition, the initial overpotential and the Tafel of Pt/Cu alloy are 25.3 mV (at 10 mA·cm^-2) and 36.82 mV·dec^-1respectively in 1 mol/L KOH. It can be found that Pt/Cu alloy exhibits better catalytic performance in acidic electrolyte. Moreover, further experiments show that the Pt/Cu alloy catalyst has high electrocatalytic activity surface area (30.83 cm²) and good cycle stability in acidic electrolyte.

Key words: catalyst, Pt/Cu alloy, solvothermal method, water electrolysis, hydrogen evolution reaction

中图分类号:

李艳, 杨振峰, 樊月瑶, 张小婷. 铂/铜合金催化剂的制备及其电解水析氢性能研究[J]. 人工晶体学报, 2023, 52(8): 1500-1508.

LI Yan, YANG Zhenfeng, FAN Yueyao, ZHANG Xiaoting. Preparation of Pt/Cu Alloy Catalyst and Its Hydrogen Evolution Performance in Electrolytic Water[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2023, 52(8): 1500-1508.

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