Metal organic framework derived NiFe@N-doped graphene microtube composites for hydrogen evolution catalyst. (May 2017)

• Record Type: Journal Article
• Authors: Wu, Shikui; Shen, Xiaoping; Zhu, Guoxing; Zhou, Hu; Ji, Zhenyuan; Ma, Lianbo; Xu, Keqiang; Yang, Jing; Yuan, Aihua
• Is Part Of: Carbon. Volume 116(2017)
• Page Start: 68
• Page End: 76
• Publication Date: 2017-05
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2017.01.085
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Designing highly efficient and stable electrocatalysts for hydrogen evolution reaction (HER) is critical to the large-scale application of clean hydrogen energy. Herein, NiFe @N-doped graphene microtube ( NiFe - NGMT ) composites have been synthesized by a facile metal organic framework (MOF) precursor route, and employed as an effective electrocatalyst for HER. The NiFe - NGMT composites, which consist of NiFe alloy particles enveloped in N-doped graphene microtubes with a diameter of 1–2 μm, were synthesized by thermal annealing a MOF precursor of nickel nitroprussides (NiFe(CN)5 NO·2H2 O) in nitrogen atmosphere. By adjusting the pyrolysis temperature, the diameter of the tubular graphene can be tuned to 50–200 nm. The obtained NiFe - NGMT composites exhibit excellent catalytic activity for HER with a low overpotential (70.5 mV) and a small Tafel slope (63.4 mV per decade), which afford the materials promising application for splitting water to generate hydrogen.