首页|Multiscale confinement nitridation in molybdenum carbide for efficient hydrogen production

Multiscale confinement nitridation in molybdenum carbide for efficient hydrogen production

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The molybdenum carbide(Mo2C)has been regarded as one of the most cost-efficient and stable electro-catalyst for the hydrogen evolution reaction(HER)by the virtue of its Pt-like electronic structures.However,the inherent limitation of high density of empty valence band significantly reduces its catalytic reactivity by reason of strong hydrogen desorption resistance.Herein,we propose a multiscale confine-ment synthesis method to design the nitrogen-rich Mo2C for modulating the band structure via decom-posing the pre-coordination bonded polymer in a pressure-tight tube sealing system.Pre-bonded C/N-Mo in the coordination precursor constructs a micro-confinement space,enabling the homogeneous nitrog-enization in-situ happened during the formation of Mo2C.Simultaneously,the evolved gases from the precursor decomposition in tube sealing system establish a macro-confinement environment,preventing the lattice N escape and further endowing a continuous nitridation.Combining the multiscale confine-ment effects,the nitrogen-rich Mo2C displays as high as 25％N-Mo concentration in carbide lattice,lead-ing to a satisfactory band structure.Accordingly,the constructed nitrogen-rich Mo2C reveals an adorable catalytic activity for HER in both alkaline and acid solution.It is anticipated that the multiscale confine-ment synthesis strategy presents guideline for the rational design of electrocatalysts and beyond.

Molybdenum carbideHydrogen evolution reactionMultiscale confinement synthesisValence band modulationNitrogen doping

Liming Dai、Chenchen Fang、Xiaoyuan Zhang、Xuefeng Xu、Xuanxuan Chen、Xinyue Zong、Xueming Hu、Wenyao Zhang、Liang Xue、Pan Xiong、Yongsheng Fu、Jingwen Sun、Junwu Zhu

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Key Laboratory for Soft Chemistry and Functional Materials,Ministry of Education,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu ProvinceFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities

5237220152125202522022471192261031693309190111101191030558

2024

10.1016/j.jechem.2024.02.049

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.94(7)
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