Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Prussian blue analogue-derived Ni and Co bimetallic oxide nanoplate arrays block-built from porous and hollow nanocubes for the efficient oxygen evolution reaction†
Nanoscale ( IF 5.8 ) Pub Date : 2019-06-01 00:00:00 , DOI: 10.1039/c9nr01804b Yan Shen 1, 2, 3, 4 , Shu-Guang Guo 4, 5, 6, 7 , Feng Du 2, 3, 8, 9, 10 , Xiao-Bo Yuan 4, 5, 6, 7 , Yintong Zhang 2, 3, 8, 9, 10 , Jianqiang Hu 1, 2, 3, 4 , Qing Shen 11, 12, 13, 14 , Wenjun Luo 1, 2, 3, 4, 15 , Ahmed Alsaedi 16, 17, 18, 19 , Tasawar Hayat 16, 17, 18, 19, 20 , Guihua Wen 4, 21, 22, 23, 24 , Guo-Ling Li 4, 5, 6, 7 , Yong Zhou 2, 3, 8, 9, 10 , Zhigang Zou 1, 2, 3, 4, 8
Nanoscale ( IF 5.8 ) Pub Date : 2019-06-01 00:00:00 , DOI: 10.1039/c9nr01804b Yan Shen 1, 2, 3, 4 , Shu-Guang Guo 4, 5, 6, 7 , Feng Du 2, 3, 8, 9, 10 , Xiao-Bo Yuan 4, 5, 6, 7 , Yintong Zhang 2, 3, 8, 9, 10 , Jianqiang Hu 1, 2, 3, 4 , Qing Shen 11, 12, 13, 14 , Wenjun Luo 1, 2, 3, 4, 15 , Ahmed Alsaedi 16, 17, 18, 19 , Tasawar Hayat 16, 17, 18, 19, 20 , Guihua Wen 4, 21, 22, 23, 24 , Guo-Ling Li 4, 5, 6, 7 , Yong Zhou 2, 3, 8, 9, 10 , Zhigang Zou 1, 2, 3, 4, 8
Affiliation
|
Effective oxygen evolution reaction (OER) catalysts composed of Earth-abundant transition metals are crucial for sustainable energy conversion and storage. Metal–organic frameworks (MOFs) with tunable compositions are promising precursors for the fabrication of hollow and porous electrocatalysts. However, pulverous MOFs usually suffer from agglomeration during pyrolysis, greatly reducing the activity of their derived catalysts. In this work, Prussian blue analogue (PBA) arrays with hierarchical multidimensional architecture were directly grown on nickel foam (NF) using a template-oriented method. The subsequent calcination in air allowed for obtaining NixCo3–xO4 nanoplate arrays consisting of porous and hollow nanocubes. The derived bimetallic NixCo3−xO4/NF required only an overpotential of 287 mV to achieve a current density of 10 mA cm−2 in 1.0 M KOH solution, which is much lower than that of the monometallic NiO and the RuO2 benchmark. The 3D intersectional architecture of the NixCo3−xO4 nanoplates and the porous and hollow nanocube subunits contributed to the large specific surface area and reduced charge-transfer resistance of the NixCo3−xO4/NF electrode. Density functional theory (DFT) calculations and post-OER characterization revealed that the incorporated Co was the active sites and electrochemical active CoOOH intermediates were in situ formed during the OER. Our study provides a facile and efficient strategy for the rational design of MOF-derived materials towards effective and low-cost electrocatalysis.
中文翻译：
普鲁士蓝类似物衍生的镍和钴双金属氧化物纳米板阵列，由多孔和中空纳米立方体构建而成，用于有效的氧释放反应†
由富含地球的过渡金属组成的有效氧释放反应（OER）催化剂对于可持续的能源转换和存储至关重要。具有可调组成的金属有机骨架（MOF）是制造中空和多孔电催化剂的有前途的前体。但是，粉状MOF通常在热解过程中会发生团聚，大大降低了其衍生催化剂的活性。在这项工作中，使用面向模板的方法将具有分层多维结构的普鲁士蓝类似物（PBA）阵列直接生长在泡沫镍（NF）上。随后在空气中煅烧可得到由多孔和中空纳米立方体组成的Ni x Co 3– x O 4纳米板阵列。衍生的双金属镍x Co 3- x O 4 / NF仅需287 mV的超电势即可在1.0 M KOH溶液中实现10 mA cm -2的电流密度，这远低于单金属NiO和RuO 2基准。Ni x Co 3− x O 4纳米板的3D交叉结构以及多孔和中空的纳米立方亚基有助于大比表面积并降低了Ni x Co 3− x O 4的电荷转移阻力/ NF电极。密度泛函理论（DFT）计算和OER后表征表明，掺入的Co是活性位点，并且在OER过程中原位形成了电化学活性CoOOH中间体。我们的研究为合理设计MOF衍生材料提供了一种简便有效的策略，以实现有效且低成本的电催化。
更新日期：2019-06-01
中文翻译：
普鲁士蓝类似物衍生的镍和钴双金属氧化物纳米板阵列，由多孔和中空纳米立方体构建而成，用于有效的氧释放反应†
由富含地球的过渡金属组成的有效氧释放反应（OER）催化剂对于可持续的能源转换和存储至关重要。具有可调组成的金属有机骨架（MOF）是制造中空和多孔电催化剂的有前途的前体。但是，粉状MOF通常在热解过程中会发生团聚，大大降低了其衍生催化剂的活性。在这项工作中，使用面向模板的方法将具有分层多维结构的普鲁士蓝类似物（PBA）阵列直接生长在泡沫镍（NF）上。随后在空气中煅烧可得到由多孔和中空纳米立方体组成的Ni x Co 3– x O 4纳米板阵列。衍生的双金属镍x Co 3- x O 4 / NF仅需287 mV的超电势即可在1.0 M KOH溶液中实现10 mA cm -2的电流密度，这远低于单金属NiO和RuO 2基准。Ni x Co 3− x O 4纳米板的3D交叉结构以及多孔和中空的纳米立方亚基有助于大比表面积并降低了Ni x Co 3− x O 4的电荷转移阻力/ NF电极。密度泛函理论（DFT）计算和OER后表征表明，掺入的Co是活性位点，并且在OER过程中原位形成了电化学活性CoOOH中间体。我们的研究为合理设计MOF衍生材料提供了一种简便有效的策略，以实现有效且低成本的电催化。
京公网安备 11010802027423号