A Strongly Coupled Graphene and FeNi Double Hydroxide Hybrid as an Excellent Electrocatalyst for the Oxygen Evolution Reaction
A Strongly Coupled Graphene and FeNi Double Hydroxide Hybrid as an Excellent Electrocatalyst for the Oxygen Evolution Reaction
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DOI：
10.1002/anie.201402822
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发表时间：
2014-07-14
影响因子：
16.6
通讯作者：
Yang, Shihe
中科院分区：
文献类型：
--
作者：
Long, Xia;Li, Jinkai;Yang, Shihe
用于析氧反应（OER）的具有成本效益的电催化剂对于能量转换和存储过程至关重要。一种新的策略是用来合成的OER的非贵金属为基础的电催化剂，通过精细结合层状FeNi双氢氧化物，催化活性和导电石墨烯片，利用两个带正电的纳米片之间的静电吸引。双氢氧化物的催化活性与石墨烯增强的电子传输之间的协同作用导致FeNi-GO混合物对OER具有优异的上级电催化性能，过电位低至0.21 V，经过还原处理后进一步降低至0.195 V。此外，在0.3 V的过电位下的转换频率已达到1 s（-1），这比以前报道的非贵金属基电催化剂高得多。
Cost-effective electrocatalysts for the oxygen evolution reaction (OER) are critical to energy conversion and storage processes. A novel strategy is used to synthesize a non-noble-metal-based electrocatalyst of the OER by finely combining layered FeNi double hydroxide that is catalytically active and electric conducting graphene sheets, taking advantage of the electrostatic attraction between the two positively charged nanosheets. The synergy between the catalytic activity of the double hydroxide and the enhanced electron transport arising from the graphene resulted in superior electrocatalytic properties of the FeNi-GO hybrids for the OER with over-potentials as low as 0.21 V, which was further reduced to 0.195 V after the reduction treatment. Moreover, the turnover frequency at the overpotential of 0.3 V has reached 1 s(-1), which is much higher than those previously reported for non-noble-metal-based electrocatalysts.