首页|Small-sized Ni-Co/Mo2C/Co6Mo6C2@C for efficient alkaline and acidic hydrogen evolution reaction by an anchoring calcination strategy

Small-sized Ni-Co/Mo2C/Co6Mo6C2@C for efficient alkaline and acidic hydrogen evolution reaction by an anchoring calcination strategy

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A novel,cheap and highly efficient Ni-Co/Mo2C/Co6Mo6C2@C nanocomposite has been success-fully constructed through simple one-step carbonization method in a nitrogen atmosphere.Polyethyleneimine in the precursor can effectively anchor molybdenum-based Keggin-type polyoxometallate and NiCo-layered double hydroxide through electrostatic and coordination interac-tions,which avoids the aggregation of catalyst particles during the pyrolysis process.After optimization,the obtained Ni-Co/Mo2C/Co6Mo6C2@C possesses small size(3-8 nm),large specific surface area and hierarchical pore structure.More importantly,Ni-Co/Mo2C/Co6Mo6C2@C presents remarkable hydrogen evolution reaction activity with low overpotentials in 0.5 mol·L-1 H2SO4(102.3 mV)and 1 mol·L-1 KOH(95 mV)to afford the current density of 10 mA·cm-2,as well as small Tafel slopes of 82.49 and 99.92 mV·dec-1,respectively.Simultaneously,this catalyst also shows outstanding stability for 12 h without a significant change in current density.The excellent catalytic performance of Ni-Co/Mo2C/Co6Mo6C2@C can put down to the synergistic effect between multiple components and the small size of the catalyst.This work provides unique insights into the preparation of efficient transition metal-based catalysts for HER.

polyoxometallateslayered double hydroxidetransition metal-based electrocatalystshydrogen evolution reaction

Jianxia Gu、Ying Zhu、Haiyan Zheng、Chunyi Sun、Zhongmin Su

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Department of Chemistry,Xinzhou Normal University,Xinzhou 034000,China

School of Chemistry,Northeast Normal University,Changchun 130024,China

国家自然科学基金Youth Science Research Project of Shanxi ProvinceScience and Technology Innovation Project of Higher Education in Shanxi ProvinceFoundation of Xinzhou Teachers University,ChinaState Key Laboratory of Safety and Control for Chemicals

219710322021030212233622021L4502021KY0710010104-19-ZC0613-0180

2024

10.1007/s11705-024-2416-2

化学科学与工程前沿
高等教育出版社

化学科学与工程前沿

CSTPCDEI
影响因子：0.172
ISSN：2095-0179
年,卷(期)：2024.18(5)
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