典型文献
Scalable synthesis of multi-shelled hollow N-doped carbon nanosheet arrays with confined Co/CoP heterostructures from MOFs for pH-universal hydrogen evolution reaction
文献摘要：
Developing low-cost but efficient hydrogen evolution reaction(HER)electrocatalysts over whole pH values is a significant but daunting task for the large-scale application of electrochemical hydrogen production.Herein,we develop,for the first time,a scalable MOF-assisted strategy for the fabrication and microstructural optimization of multi-shelled hollow N-doped carbon nanosheet arrays with confined Co/CoP heterostructures on carbon cloth(Co/CoP@NC/CC)for boosting HER performances.The key to this strategy is the step-by-step epitaxial growth of unprecedented multilayer ZIF-L arrays on carbon cloth,which are subsequently pyrolyzed and controllably phosphorized to achieve the precise control over the shell number and nanoarchi-tectures of the Co/CoP@NC/CC.Impressively,the HER performances can be significantly enhanced by increasing hollow shell number,and the optimal triple-shelled hollow Co/CoP@NC/CC exhibits low overpotentials of 86,78 and 145 mV in acidic,alkaline and neutral media to deliver a current density of 10 mA cm 2,respectively,ranking as one of the best Co-based HER electrocatalysts over whole pH values.Further DFT calculations suggest that the Co/CoP heterostructures can effectively boost the cleavage of H-OH to generate protons and optimize the adsorption energy of hydrogen(△GH*),which,together with the large electrode/electrolyte interface and accelerated charge/mass transfer of multi-shelled hollow array structure as well as the good conductivity and dispersity,are responsible for the remarkably improved HER performances.This study not only provides a new toolbox for enriching the family of multi-shelled nanoarchitecture materials,but also points out a general and effective route to develop highly efficient self-supported electrode materials for energy-related applications and beyond.
文献关键词：
中图分类号：
作者姓名：
Zhiqiao Wang;Kui Shen;Liyu Chen;Yingwei Li
作者机构：
Key Laboratory of Fuel Cell Technology of Guangdong Province,School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,China;State Key Laboratory of Pulp and Paper Engineering,School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,China
文献出处：
引用格式：
[1]Zhiqiao Wang;Kui Shen;Liyu Chen;Yingwei Li-.Scalable synthesis of multi-shelled hollow N-doped carbon nanosheet arrays with confined Co/CoP heterostructures from MOFs for pH-universal hydrogen evolution reaction)[J].中国科学:化学（英文版）,2022(03):619-629
A类：
phosphorized
B类：
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AB值：
0.530023
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