Wenyue Zhang , Jing Sui , Guojin Sun , Ziqin Li , Qian Zhang , Jianhua Yu , Zhixing Gan , Lina Sui , Lifeng Dong
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引用次数: 0
摘要
开发具有优异性能和耐用性的低成本双功能催化剂是推进水分解技术的关键。本研究采用水热合成和电炉煅烧相结合的方法,在泡沫镍(NF)表面制备了C-MoS2-NiFeO复合材料作为双功能电催化剂。由此产生的三维结构提供了丰富的催化活性位点,并提高了电化学过程中的导电性。结果表明,C-MoS2 - NiFeO@NF电极在100 mA cm−2电流密度下的过电位为260 mV, Tafel斜率为30 mV·dec−1,在析氧反应中表现出优异的性能。此外,该材料表现出优异的析氢反应活性,只需200 mV的过电位就能达到100 mA cm−2的电流密度,以及55 mV·dec−1的塔菲尔斜率。这些结果强调了C-MoS2 - NiFeO@NF作为一种有前途的双功能催化剂的潜力。
Three-dimensional C–MoS2–NiFeO@NF nanohybrids as highly efficient bifunctional catalysts for overall water splitting
Creating cost-effective dual-functional catalysts that exhibit superior performance and durability is essential for the advancement of water splitting technology. In this study, C–MoS2–NiFeO composites were fabricated as bifunctional electrocatalysts on nickel foam (NF) through a combination of hydrothermal synthesis and furnace calcination. The resulting three-dimensional structure provides an abundance of catalytically active sites and enhances conductivity during electrochemical processes. As a result, the C–MoS2–NiFeO@NF electrode showcased remarkable performance in the oxygen evolution reaction, achieving a minimal overpotential of 260 mV at a current density of 100 mA cm−2 and exhibiting a Tafel slope of 30 mV·dec−1. Moreover, the material displayed exceptional activity for the hydrogen evolution reaction, necessitating just 200 mV of overpotential to reach a current density of 100 mA cm−2, along with a Tafel slope of 55 mV·dec−1. These results underscore the potential of C–MoS2–NiFeO@NF as a promising dual functional catalyst for overall water splitting.
期刊介绍:
Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.