Developing efficient, stable, and cost-effective electrocatalysts is crucial for large-scale industrial water electrolysis hydrogen production. In this study, a-Cu2Se@Cu3P/CF heterostructure electrode was constructed by form amorphous Cu2Se on Cu3P nanowire array, which proved the electrode efficient contact with electrolyte, enhanced electron transfer in the electrode with abundant pathway and active sites. Ultimately, these enhancements significantly improved the HER performance of the a-Cu2Se@Cu3P/CF electrode. In alkaline electrolyte, the a-Cu2Se@Cu3P/CF electrode exhibits overpotential as 99 mV@10 mA cm−2 and Tafel slope as 79 mV/dec. The a-Cu2Se@Cu3P/CF electrode is capable of maintaining a stable potential (− 1.17 V, − 1.21 V, − 1.30 V, − 1.37 V, − 1.50 V) for a long duration (10 h) at different current densities (10 mA cm−2, 20 mA cm−2, 50 mA cm−2, 100 mA cm−2, 200 mA cm−2). Additionally, at a current density of 100 mA cm−2 and 200 mA cm−2, the catalytic performance has been slightly enhanced approximately 1.5 % and 1.8 % at the end of 10 h duration test. This demonstrated the excellent stability of the a-Cu2Se@Cu3P/CF electrocatalyst, showcasing its potential for practical applications in hydrogen production.

中文翻译：

---

非晶/晶异质结构a-Cu2Se@Cu3P/CF电催化剂用于碱性介质析氢反应


开发高效、稳定、经济的电催化剂对于大规模工业水电解制氢至关重要。本研究通过在Cu3P纳米线阵列上形成非晶Cu2Se构建了a-Cu2Se@Cu3P/CF异质结构电极，证明了该电极与电解质的有效接触，增强了电极中的电子传递，具有丰富的通道和活性位点。最终，这些增强显着提高了 a-Cu2Se@Cu3P/CF 电极的 HER 性能。在碱性电解液中，a-Cu2Se@Cu3P/CF 电极的过电势为 99 mV@10 mA cm−2，塔菲尔斜率为 79 mV/dec。 a-Cu2Se@Cu3P/CF电极能够在不同的电流密度下长时间（10小时）保持稳定的电位（− 1.17 V，− 1.21 V，− 1.30 V，− 1.37 V，− 1.50 V）。 10 mA cm−2、20 mA cm−2、50 mA cm−2、100 mA cm−2、200 mA cm−2）。此外，在100 mA cm−2和200 mA cm−2的电流密度下，在10小时持续测试结束时，催化性能略有增强约1.5%和1.8%。这证明了a-Cu2Se@Cu3P/CF电催化剂具有优异的稳定性，展示了其在制氢方面的实际应用潜力。