A layered Na1−xNiyFe1−yO2 double oxide oxygen evolution reaction electrocatalyst for highly efficient water-splitting
A layered Na1−xNiyFe1−yO2 double oxide oxygen evolution reaction electrocatalyst for highly efficient water-splitting
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DOI：
10.1039/c6ee03088b
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发表时间：
2017-01
影响因子：
32.5
通讯作者：
Baicheng Weng;Fenghua Xu;Changlei Wang;Weiwei Meng;C. Grice;Yanfa Yan
中科院分区：
文献类型：
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作者：
Baicheng Weng;Fenghua Xu;Changlei Wang;Weiwei Meng;C. Grice;Yanfa Yan
过渡金属Ni和Co基氧化物是替代昂贵且稀缺的贵金属基析氧反应（OER）催化剂（如IrO 2和RuO 2）的潜在候选物，所述催化剂是从太阳能水分解和可充电能量存储技术中高效制氢所需的。到目前为止，层状NiFe双氢氧化物在所有Ni基和Co基氧化物中表现出最好的OER活性。在这里，我们报道了新的层状Na 1-xNiyFe 1-yO 2双氧化物OER催化剂，其表现出超过包括IrO 2和RuO 2的贵金属OER催化剂的活性和稳定性，以及层状NiFe双氢氧化物OER催化剂。其上级催化性能的提高主要归因于Ni和Fe的层状结构和高共价性。由具有14.69%的功率转换效率的卤化铅钙钛矿太阳能电池供电，将Na0.08Ni0.9Fe0.1O2 OER催化剂与NiP析氢反应催化剂相结合的双电极太阳能水分解装置提供了11.22%的太阳能-氢气转换效率。我们的设计和制造策略为开发用于水分解和金属空气电池的高活性电催化剂提供了见解。
Transition metal Ni- and Co-based oxides are potential candidates to replace expensive and scarce noble metal-based oxygen evolution reaction (OER) catalysts such as IrO2 and RuO2, which are required for efficient hydrogen production from solar water splitting and rechargeable energy storage technologies. So far, layered NiFe double hydroxide represents the best OER activity among all Ni- and Co-based oxides. Here, we report new layered Na1−xNiyFe1−yO2 double oxide OER catalysts exhibiting activity and stability surpassing those of noble metal OER catalysts including IrO2 and RuO2, and a layered NiFe double hydroxide OER catalyst. The superior catalytic properties can be ascribed to the layered structure as well as the enhanced covalency of Ni and Fe. Powered by a lead halide perovskite solar cell with a power conversion efficiency of 14.69%, a two-electrode solar water-splitting device combining a Na0.08Ni0.9Fe0.1O2 OER catalyst with a NiP hydrogen evolution reaction catalyst delivers a solar-to-hydrogen conversion efficiency of 11.22%. Our design and fabrication strategies offer insights for developing highly active electrocatalysts for water splitting and metal–air batteries.