An Advanced Ni-Fe Layered Double Hydroxide Electrocatalyst for Water Oxidation
An Advanced Ni-Fe Layered Double Hydroxide Electrocatalyst for Water Oxidation
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DOI：
10.1021/ja4027715
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发表时间：
2013-06-12
影响因子：
15
通讯作者：
Dai, Hongjie
中科院分区：
文献类型：
--
作者：
Gong, Ming;Li, Yanguang;Dai, Hongjie
用于水氧化以释放氧气的高活性、耐用且具有成本效益的电催化剂是一系列可再生能源解决方案的关键，包括水分解和可充电金属空气电池。在这里，我们报告了在轻度氧化的多壁碳纳米管（CNTs）上合成的层状镍-铁双氢氧化物（NiFe-LDH）纳米片。将Fe掺入到氢氧化镍中诱导NiFe-LDH的形成。纳米片形式的结晶NiFe-LDH相被发现对于碱性溶液中的析氧反应具有高度活性。对于生长在碳纳米管网络上的NiFe-LDH，所得NiFe-LDH/CNT复合物表现出比商业贵金属Ir催化剂更高的析氧电催化活性和稳定性。
Highly active, durable, and cost-effective electrocatalysts for water oxidation to evolve oxygen gas hold a key to a range of renewable energy solutions, including water splitting and rechargeable metal-air batteries. Here, we report the synthesis of ultrathin nickel-iron layered double hydroxide (NiFe-LDH) nanoplates on mildly oxidized multiwalled carbon nanotubes (CNTs). Incorporation of Fe into the nickel hydroxide induced the formation of NiFe-LDH. The crystalline NiFe-LDH phase in nanoplate form is found to be highly active for oxygen evolution reaction in alkaline solutions. For NiFe-LDH grown on a network of CNTs, the resulting NiFe-LDH/CNT complex exhibits higher electrocatalytic activity and stability for oxygen evolution than commercial precious metal Ir catalysts.