Yinchen Dai , Jibiao Guan , Xiao Li , Baochun Guo , Lina Wang , Ming Zhang
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引用次数: 0
Abstract
The development and improvement of new transition metal-based catalysts to replace Pt/C electrodes in electrolytic water hydrogen evolution has attracted much attention. In this work, we used ammonium citrate as additive, mixed with cobalt nitrate, through hydrothermal and phosphating methods to get supported on carbon cloth catalyst with new morphology (referred to as E380-CoP/CC, E380 stands for ammonium citrate). Benefit from the dense and fine nanosheet structure, compared with cobalt phosphating alone, the catalyst E380-CoP/CC has a significant improvement in hydrogen evolution performance. In 1 M KOH, the overpotential is 57 mV at the current density of 10 mA cm−2, and the Tafel slope is only 40 mV dec-1, which is very close to the hydrogen evolution performance of Pt/C electrode. In addition, the catalyst has favorable stability and superior hydrogen evolution performance after undergoing CV 2000 cycles and 48 h i-t test. This work offers a reliable idea for realizing electrolytic water hydrogen evolution technology with high efficiency and energy saving.
新型过渡金属基催化剂取代Pt/C电极用于电解水析氢的研究一直备受关注。本研究以柠檬酸铵为添加剂，与硝酸钴混合，通过水热法和磷化法得到新型形态的碳布催化剂(简称E380- cop /CC, E380代表柠檬酸铵)。得益于致密和精细的纳米片结构，E380-CoP/CC催化剂的析氢性能比单独的钴磷化有显著提高。在1 M KOH条件下，过电位为57 mV，电流密度为10 mA cm−2,Tafel斜率仅为40 mV dec1，这与Pt/C电极的析氢性能非常接近。此外，经过cv2000循环和48 h i-t测试，该催化剂具有良好的稳定性和优异的析氢性能。为实现高效节能的电解水析氢技术提供了可靠的思路。
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