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g-C₃N₄/Chlorocobaloxime纳米复合物作为水分和储能多功能电催化剂

Subramanian Sowmya¹, Vijendran Vijaikanth¹

¹Department of Applied Chemistry, Karunya Institute of Technology and Sciences, Coimbatore 641114, Tamilnadu, India.

|September 18, 2023

概括

这项研究开发了新的g-C3N4/chlorocobaloxime复合物,用于高效的进化反应 (HER) 和氧进化反应 (OER). 该g-C3N4/C2复合物表现出优越的电催化活性和稳定性,用于整体的水分裂.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
能源转化和储存能源转化和储存

背景情况:

对可持续能源解决方案的日益增长的需求需要先进的电催化剂.
环境问题和能源耗尽推动了对成本效益高,高性能材料的需求.
石墨碳化物 (g-C3N4) 和cobaloxime复合物显示出作为电催化剂的前景.

研究的目的:

开发用于电催化应用的新型g-C3N4/chlorocobaloxime复合物.
研究这些复合材料的演变反应 (HER) 和氧演变反应 (OER) 性能.
探索它们在储能方面的潜力,特别是超级容量.

主要方法:

用不同的中性基合成和表征各种含有中性基的甲基.
使用FTIR,UV-DRS,XRD,SEM,TEM,HRTEM,XPS,PSA,BET和EDAX,制备和全面描述g-C3N4/chlorocobaloxime纳米复合材料.
使用循环电压测量和电荷放电研究等技术,对HER,OER和超容量的电化学评估.

主要成果:

这种g-C3N4/C2复合物,含有pyridine-3,5-dicarboxylic acid,表现出极好的HER活性 (在-10 mA cm-2时具有173 mV的超电位) 和OER活性 (303 mV的超电位).
与其他纳米复合材料相比,这种复合材料在较低的Tafel斜率 (55 mV dec-1用于HER,114 mV dec-1用于OER) 中表现出更高的效率.
观察到整体水分裂 (120小时) 的长期稳定性和良好的特异电容 (236 F g-1 在0.5 A g-1 对g-C3N4/C1) 时.

结论:

开发的g-C3N4/chlorocobaloxime纳米复合材料是HER和OER的有效电催化剂.
增强的性能归因于碳酸酸功能化的电子吸收性质,改善了电子的移动性.
这些材料在能源转换和储存系统中具有很大的应用潜力.

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