Fe ion-chelated tannic acid layer coordinates the electronic structure of Ni-WOx to enhance oxygen evolution performance
Fe ion-chelated tannic acid layer coordinates the electronic structure of Ni-WOx to enhance oxygen evolution performance
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Fe离子螯合单宁酸层协调Ni-WOx的电子结构以增强析氧性能
DOI：
10.1016/j.jallcom.2022.167225
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发表时间：
2022-09
影响因子：
6.2
通讯作者：
Woon-Ming Lau
中科院分区：
文献类型：
--
作者：
Yange Wang;Yechen Wang;Jing Bai;Sibin Duan;Rongming Wang;Woon-Ming Lau
析氧反应(OER)被认为是效率的限制步骤，因为它在水分解过程中经历了一个动力学缓慢的四电子过程。通过界面修饰工程调整催化剂的电子结构，可以提高催化剂的本征催化活性。本工作通过界面配位组装的方法，将铁离子络合单宁酸包覆在镍钨氧化物纳米线上，形成TA-Fe@Ni-WOx型层次化结构。这种分级结构具有丰富的活性中心和良好的导电性，在碱性电解液中表现出优异的超电流变性能。具体地说，TA-Fe@Ni-WOx型催化剂在20 mA/cm−和50 mA/cm−2时的过电位分别为240mV和260mV。X-射线光电子能谱结果证实，由于在Ni-WOx线表面引入了TA-Fe纳米片层，TA-Fe@Ni-WOxs的电子结构比Ni-WOxs更有利于OER。此外，紫外光电子能谱结果证实了TA-Fe@Ni-Wox型层状结构具有向上移动的费米能量和较小的电离势，提供了一个更富电子的环境。结果表明，这种简单的界面配位组装涂层策略是一种合理调节金属氧化物表面性质的有效方法，具有广阔的应用前景。
The oxygen evolution reaction (OER) is regarded as the efficiency-limiting step because it suffers from a kinetically sluggish four-electron process in water splitting. The intrinsic catalytic activity could be improved by adjusting the electronic structure of the catalyst through interface modification engineering. In this work, Fe ion-chelated tannic acid was coated on Ni-WOxnanowires to form TA-Fe@Ni-WOxhierarchical structure by the interfacial coordination assembly process. The hierarchical structure has abundant active sites and good electrical conductivity, which exhibits extraordinary OER performance in alkaline electrolytes. Specifically, the TA-Fe@Ni-WOxcatalyst requires low over-potentials of 240 and 260 mV at 20 mA cm−2and 50 mA cm−2, respectively. X-ray photoelectron spectroscopy results confirm that the electronic structure of TA-Fe@Ni-WOxis more beneficial to OER than Ni-WOxdue to the introduction of the TA-Fe nano-sheets overlayer on the surface of Ni-WOxnanowires. Furthermore, the ultraviolet photoelectron spectroscopy results confirm that the TA-Fe@Ni-WOxhierarchical structure has an upward-moving Fermi energy and a smaller ionization potential, providing a more electron-rich environment. It is demonstrated that this simple interfacial coordination assembly coating strategy is an effective way to reasonably adjust the surface properties of metal oxides for promising applications.
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影响因子：
10.8
作者：
Xufeng Li;Yijiang Liu;Hongbiao Chen;Mei Yang;Duanguang Yang;Hua-ming Li;Zhiqun Lin
通讯作者：
Xufeng Li;Yijiang Liu;Hongbiao Chen;Mei Yang;Duanguang Yang;Hua-ming Li;Zhiqun Lin
影响因子：
4.5
作者：
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12.9
作者：
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通讯作者：
Chuchu Wu;Huanqiao Li;Zhangxun Xia;Xiaomin Zhang;Ruoyi Deng;Suli Wang;Gongquan Sun
影响因子：
27.8
作者：
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通讯作者：
Zhaoyang Wang;Lin Xu;Fuzhi Huang;Long Qu;Jiantao Li;K. Owusu;Zi'ang Liu;Zifeng Lin;Binhua Xiang-Bi
影响因子：
15.1
作者：
Di Yin;Yundong Cao;Dongfeng Chai;Lin-lin Fan;Guang-gang Gao;Mingliang Wang;Hong Liu;Zhenhui Kang-Zh
通讯作者：
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