Simple Solution Route to Synthesize NiFe Oxide/Nanocarbon Composite Catalysts for the Oxygen Evolution Reaction
Simple Solution Route to Synthesize NiFe Oxide/Nanocarbon Composite Catalysts for the Oxygen Evolution Reaction
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合成用于析氧反应的 NiFe 氧化物/纳米碳复合催化剂的简单溶液路线
DOI：
10.1039/d2nj00947a
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发表时间：
2022
影响因子：
3.3
通讯作者：
Hideki Kurokawa
中科院分区：
文献类型：
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作者：
Mizuri Yaguchi;Miru Yoshida-Hirahara;Hitoshi Ogihara;Hideki Kurokawa
水电解是一种很有前途的大规模生产绿色氢气的技术。然而，析氧反应（OER），这是一个半反应的水电解，是动力学缓慢，和许多活性地球丰富的OER催化剂已被研究。在这项研究中，我们使用一个简单的解决方案过程中制备的NiFe氧化物/纳米碳复合材料。将硝酸镍和硝酸铁的乙醇溶液加入到商业炭黑中，并将混合物在空气中在350 °C下煅烧。在这个简单的过程中，无定形NiFe氧化物沉积在炭黑上。能量色散X射线光谱表明，镍和铁是很好地分散在炭黑。X射线光电子能谱和循环伏安法表明，Ni和Fe位于彼此相邻，并形成NiFe物种。NiFe氧化物/纳米碳复合催化剂表现出与最先进的Ir/C催化剂相当的高OER活性。这项研究表明，简单的溶液过程产生的NiFe氧化物/纳米碳复合催化剂，有效地催化OER。该方法可用于合成活性高、成本低的绿色制氢OER催化剂。
Water electrolysis is a promising technology for the mass production of green hydrogen. However, the oxygen evolution reaction (OER), which is a half-reaction of water electrolysis, is kinetically sluggish, and many active earth-abundant OER catalysts have been investigated. In this study, we prepared a NiFe oxide/nanocarbon composite using a simple solution process. An ethanol solution of Ni nitrate and Fe nitrate was added to commercial carbon black, and the mixture was calcined in air at 350 °C. During this simple process, amorphous NiFe oxide was deposited onto the carbon black. Energy-dispersive X-ray spectroscopy indicated that the Ni and Fe were well dispersed on the carbon black. X-ray photoelectron spectroscopy and cyclic voltammetry indicated that Ni and Fe were located adjacent to each other, and that the NiFe species had formed. The NiFe oxide/nanocarbon composite catalysts exhibited high OER activity that was comparable to that of state-of-the-art Ir/C catalysts. This study demonstrated that the simple solution process produced a NiFe oxide/nanocarbon composite catalyst that efficiently catalyzes the OER. This process could be used to synthesize active and cost-effective OER catalysts for the production of green hydrogen.