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NiPS3 Nanosheet–Graphene Composites as Highly Efficient Electrocatalysts for Oxygen Evolution Reaction
ACS Nano ( IF 15.8 ) Pub Date : 2018-06-14 00:00:00 , DOI: 10.1021/acsnano.7b09146
Sen Xue 1, 2 , Long Chen 1, 3 , Zhibo Liu 1 , Hui-Ming Cheng 1, 4 , Wencai Ren 1
Affiliation  

Developing new electrocatalysts is essentially important for efficient water splitting to produce hydrogen. Two-dimensional (2D) materials provide great potential for high-performance electrocatalysts because of their high specific surface area, abundant active edges, and tunable electronic structure. Here, we report few-layer NiPS3 nanosheet–graphene composites for high-performance electrocatalysts for oxygen evolution reaction (OER). The pure NiPS3 nanosheets show an overpotential of 343 mV for a current density of 10 mA cm–2, which is comparable to that for IrO2 and RuO2 catalysts. More importantly, the NiPS3 nanosheet–graphene composites show significantly improved OER activity due to the synergistic effect. The optimized composite shows a very low overpotential of 294 mV for a current density of 10 mA cm–2, 351 mV for a current density of 100 mA cm–2, a small Tafel slope of 42.6 mV dec–1, and excellent stability. These overall performances are far better than those of the reported 2D materials and even better than those of many traditional materials even at a much lower mass loading of NiPS3.

中文翻译:

NiPS 3纳米片–石墨烯复合材料作为氧释放反应的高效电催化剂

开发新的电催化剂对于有效的水分解产生氢气至关重要。二维(2D)材料具有高的比表面积,丰富的活性边缘和可调节的电子结构,因此为高性能电催化剂提供了巨大的潜力。在这里,我们报告了用于氧气析出反应(OER)的高性能电催化剂的多层NiPS 3纳米片-石墨烯复合材料。纯NiPS 3纳米片在10 mA cm –2的电流密度下显示343 mV的超电势,与IrO 2和RuO 2催化剂的电势相当。更重要的是,NiPS 3纳米片-石墨烯复合材料由于协同作用而显示出显着改善的OER活性。经过优化的复合材料在10 mA cm –2的电流密度下显示出294 mV的极低电势,在100 mA cm –2的电流密度下显示出351 mV的低电势,Tafel斜度为dec –1的42.6 mV小,稳定性极佳。即使在低得多的NiPS 3质量负载下,这些整体性能也远远优于报道的2D材料,甚至优于许多传统材料。
更新日期:2018-06-14
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