Metallic 1T-MoS2 nanosheets in-situ entrenched on N,P,S-codoped hierarchical carbon microflower as an efficient and robust electro-catalyst for hydrogen evolution
Metallic 1T-MoS2 nanosheets in-situ entrenched on N,P,S-codoped hierarchical carbon microflower as an efficient and robust electro-catalyst for hydrogen evolution
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原位固定在 N、P、S 共掺杂分级碳微花上的金属 1T-MoS2 纳米片作为高效、稳健的析氢电催化剂
DOI：
10.1016/j.apcatb.2018.11.004
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发表时间：
2019-04
期刊：
影响因子：
--
通讯作者：
Cheng Hansong
中科院分区：
文献类型：
--
作者：
Xiong Jie;Li Jing;Shi Jiawei;Zhang Xinlei;Cai Weiwei;Yang Zehui;Cheng Hansong
通过多巴胺自聚合、脱磷和水热还原的方法，成功地将原位铵插层诱导的MoS 2表面硫原子畸变生成的含磷金属1 T-MoS 2嵌入到N，P，S共掺杂的分级花状碳（HCMF）中。由于金属相、富缺陷特性、杂原子掺杂剂和高导电碳载体的耦合效应，P-MoS 2 @HCMF表现出优异的性能，在0.5 M H2SO 4中，其过电位仅为86 mV，提供10 mA cm-2的电流密度和42.35 mV dec-1的小Tafel斜率。这是基于二硫化钼的HER催化剂的最佳结果之一。引人注目的是，受益于S空位和P掺杂剂作为电子供体的作用，以及刚性碳微花支架对MoS 2纳米片的拉伸产生的应变以克服纳米片的团聚障碍，P-MoS 2 @HCMF保持良好的原始1 T相，并表现出上级循环稳定性，在5000次扫描中具有不可区分的过电位衰减和在100小时长的过程中具有非凡的HER耐久性。长期运行，电流恶化可忽略不计。这些发现突出了P-MoS 2 @HCMF作为用于HER的高效且稳定的无贵金属的电催化剂的前景潜力。
Phosphorus contained metallic 1T-MoS2produced fromin-situammonium intercalation induced surface sulfur atom distortion of MoS2rooted in N,P,S-codoped hierarchical flowerlike carbon (HCMF) hybrids were successfully preparedviaa dopamine self-polymerization together with molybdate process followed by a hydrothermal reduction route. On account of the coupling effect of metallic phase, defect-rich character, heteroatomic dopants and highly conductive carbon support, the P-MoS2@HCMF demonstrates prominent performances with an overpotential of merely 86 mV to deliver a current density of 10 mA cm–2and a small Tafel slope of 42.35 mV dec–1for hydrogen evolution reaction (HER) in 0.5 M H2SO4, which are among the best results for molybdenum disulfide based HER catalysts. Strikingly, benefiting from S vacancies and P dopant functioning as electron donors, as well as strain arisen from the tensile of rigid carbon microflower scaffold to MoS2nanosheets to overcome agglomeration barriers of nanosheets, P-MoS2@HCMF remained well the pristine 1 T phase and exhibited superior cycling stability with indistinguishable overpotential decay over 5000 sweeps and extraordinary HER durability during the 100 h long-term operation with negligible current deterioration. These findings highlight the prospective potential of P-MoS2@HCMF as a highly efficient and stable noble metal-free electrocatalyst towards HER.
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影响因子：
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作者：
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发表时间：
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期刊：
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影响因子：
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