Jianmin Yu , Yongteng Qian , Sohyeon Seo , Yang Liu , Huong T.D. Bui , Ngoc Quang Tran , Jinsun Lee , Ashwani Kumar , Hongdan Wang , Yongguang Luo , Xiaodong Shao , Yunhee Cho , Xinghui Liu , Min Gyu Kim , Hyoyoung Lee
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引用次数: 2
Abstract
Herein, a stable and efficient CoS2-ReS2 electrocatalyst is successfully constructed by using the different molar ratios of CoS2 on ReS2. The size and morphology of the catalysts are significantly changed after the CoS2 is grown on ReS2, providing regulation of the catalytic activity of ReS2. Particularly, the optimized CoS2-ReS2 shows superior electrocatalytic properties with a low voltage of 1.48 V at 20 mA cm−2 for overall water splitting in 1.0 M KOH, which is smaller than the noble metal-based catalysts (1.77 V at 20 mA cm−2). The XPS, XAS, and theoretical data confirm that the interfacial regulation of ReS2 by CoS2 can provide rich edge catalytic sites, which greatly optimizes the catalytic kinetics and drop the energy barrier for oxygen/hydrogen evolution reactions. Our results demonstrated that interfacial engineering is an efficient route for fabricating high-performance water splitting electrocatalysts.
在此,通过使用CoS2与ReS2的不同摩尔比,成功构建了稳定高效的CoS2-ReS2电催化剂。CoS2在ReS2上生长后,催化剂的尺寸和形态发生了显著变化,从而调节了ReS2的催化活性。特别地,优化的CoS2-ReS2显示出优异的电催化性能,在20 mA cm−2下的1.48 V的低电压用于在1.0 M KOH中的整体水分解,这比贵金属基催化剂(在20 mA cm-2下为1.77 V)小。XPS、XAS和理论数据证实,CoS2对ReS2的界面调节可以提供丰富的边缘催化位点,这大大优化了催化动力学,降低了析氧/析氢反应的能垒。我们的研究结果表明,界面工程是制备高性能水分解电催化剂的有效途径。