A Glass‐Ceramic with Accelerated Surface Reconstruction toward the Efficient Oxygen Evolution Reaction,Angewandte Chemie International Edition

当前位置： X-MOL 学术 › Angew. Chem. Int. Ed. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A Glass‐Ceramic with Accelerated Surface Reconstruction toward the Efficient Oxygen Evolution Reaction
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-11-10 , DOI: 10.1002/anie.202014210
Shanlin Li _{1,

2,

3} , Zichuang Li ₁ , Ruguang Ma _{1,

2} , Chunlang Gao ₃ , Linlin Liu ₃ , Lanping Hu ₄ , Jinlin Zhu ₄ , Tongming Sun ₄ , Yanfeng Tang ₄ , Danmin Liu ₃ , Jiacheng Wang _{1,

2}

Affiliation

The effective non‐precious metal catalysts toward the oxygen evolution reaction (OER) are highly desirable for electrochemical water splitting. Herein, we prepare a novel glass‐ceramic (Ni_1.5Sn@triMPO₄) by embedding crystalline Ni_1.5Sn nanoparticles into amorphous trimetallic phosphate (triMPO₄) matrix. This unique crystalline‐amorphous nanostructure synergistically accelerates the surface reconstruction to active Ni(Fe)OOH, due to the low vacancy formation energy of Sn in glass‐ceramic and high adsorption energy of PO₄³⁻ at the V_O sites. Compared to the control samples, this dual‐phase glass‐ceramic exhibits a remarkably lowered overpotential and boosted OER kinetics after surface reconstruction, rivaling most of state‐of‐the‐art electrocatalysts. The residual PO₄³⁻ and intrinsic V_O sites induce redistribution of electron states, thus optimizing the adsorption of OH* and OOH* intermediates on metal oxyhydroxides and promoting the OER activity.

中文翻译：

一种玻璃陶瓷，具有促进高效氧释放反应的表面重建功能

对于电化学水分解，非常需要有效的用于氧气析出反应（OER）的非贵金属催化剂。在这里，我们通过将结晶的Ni _1.5 Sn纳米颗粒嵌入非晶态三金属磷酸盐（triMPO ₄）基质中来制备新型的玻璃陶瓷（Ni _1.5 Sn @ triMPO ₄）。由于玻璃陶瓷中锡的空位形成能低且在V _O处PO ₄^3−的高吸附能，这种独特的晶体-非晶态纳米结构协同促进了表面重建为活性Ni（Fe）OOH。网站。与对照样品相比，这种双相玻璃陶瓷在表面重建后表现出明显降低的过电势并提高了OER动力学，可与大多数最新的电催化剂相媲美。残留的PO ₄^3-和固有的V _O位诱导电子态的重新分布，从而优化OH *和OOH *中间体在金属羟基氧化物上的吸附并提高OER活性。

更新日期：2020-11-10

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11