Integration of Active Nickel Oxide Clusters by Amino Acids for Water Oxidation
Integration of Active Nickel Oxide Clusters by Amino Acids for Water Oxidation
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DOI：
10.1021/acs.jpcc.6b08796
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发表时间：
2017
影响因子：
3.7
通讯作者：
Masaaki Yoshida;S. Onishi;Yosuke Mitsutomi;F. Yamamoto;M. Nagasaka;H. Yuzawa;N. Kosugi;H. Kondoh
中科院分区：
文献类型：
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作者：
Masaaki Yoshida;S. Onishi;Yosuke Mitsutomi;F. Yamamoto;M. Nagasaka;H. Yuzawa;N. Kosugi;H. Kondoh
利用可再生能源——高效析氧电催化剂——实现可持续的水制氢是至关重要的，因为水分解效率受限于析氧能力，而析氧能力与析氢反应相比是不够的。在此，我们报告了一种新的方法，通过氨基酸整合活性氧化镍簇来提高析氧活性，这意味着电沉积的氧化镍的数量在保持催化活性的同时增加。该方法提高了催化活性，因为反应位点在三维空间上显著增加。利用operando紫外/可见吸收和Ni K-edge x射线吸收光谱技术研究了详细的反应机理，表明甘氨酸、丙氨酸和谷氨酰胺等氨基酸促进了NiO6八面体结构团簇的电沉积。同时，对N和O k边x射线吸收光谱的分析表明：
The move toward sustainable hydrogen production from water using renewable energy, a highly efficient oxygen evolution electrocatalyst, is crucial because water-splitting efficiency is restricted to the oxygen evolution capability, which is insufficient compared to the hydrogen evolution reaction. Herein, we report a new method that improves the oxygen evolution activity by integration of active nickel oxide clusters using amino acids, meaning that the amount of electrodeposited nickel oxides is increasing with maintaining the catalytic activity. This method enhances the catalytic activity because the reaction sites drastically increase in three dimensions. The detailed reaction mechanism was investigated using operando UV/vis absorption and Ni K-edge X-ray absorption spectroscopic techniques, which suggested that amino acids such as glycine, alanine, and glutamine promoted the electrodeposition of NiO6 octahedral structure clusters. Meanwhile, the analysis of N and O K-edge X-ray absorption spectra showe...