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In Situ Engineering of Double-Phase Interface in Mo/Mo2C Heteronanosheets for Boosted Hydrogen Evolution Reaction
ACS Energy Letters ( IF 19.3 ) Pub Date : 2018-01-11 00:00:00 , DOI: 10.1021/acsenergylett.7b01180 Jie Xiong 1, 2 , Jing Li 1 , Jiawei Shi 1 , Xinlei Zhang 1 , Nian-Tzu Suen 3 , Zhao Liu 1 , Yunjie Huang 1 , Guoxiao Xu 1 , Weiwei Cai 1 , Xinrong Lei 1 , Ligang Feng 3 , Zehui Yang 1 , Liang Huang 4 , Hansong Cheng 1
ACS Energy Letters ( IF 19.3 ) Pub Date : 2018-01-11 00:00:00 , DOI: 10.1021/acsenergylett.7b01180 Jie Xiong 1, 2 , Jing Li 1 , Jiawei Shi 1 , Xinlei Zhang 1 , Nian-Tzu Suen 3 , Zhao Liu 1 , Yunjie Huang 1 , Guoxiao Xu 1 , Weiwei Cai 1 , Xinrong Lei 1 , Ligang Feng 3 , Zehui Yang 1 , Liang Huang 4 , Hansong Cheng 1
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Two-dimensional Mo/Mo2C heteronanosheets (Mo/Mo2C-HNS) were successfully prepared via a NaCl template-assisted synthesis route followed by a controllable simultaneous reduction and carbonization of MoO3 nanosheets for efficient hydrogen evolution reaction (HER) catalysis under both acidic and alkaline conditions. The Mo species in the atomically thin Mo/Mo2C-HNS not only guarantees the rapid transport of electrons but also optimizes the electronic configuration of β-Mo2C. Besides, the abundant Mo/β-Mo2C heterointerfaces in nanodimension afford large numbers of additional heterogeneous catalytic sites. HER electrocatalytic performance with overpotential of merely 89 mV to drive a current density of 10 mA/cm2 in 0.5 M H2SO4 is therefore achieved. Strikingly, stable chronoamperometric electrolysis for 20 h and also an impressive cycling stability with negligible overpotential decay over 4000 sweeps demonstrate its considerable durability in an acidic environment. These findings highlight the promising potential of Mo/Mo2C-HNS catalyst as an efficient and stable noble metal-free electrocatalyst toward the HER.
中文翻译：
Mo / Mo 2 C异质纳米片中双相界面的原位工程用于促进氢释放反应
通过NaCl模板辅助合成路线成功地制备了二维Mo / Mo 2 C异质纳米片（Mo / Mo 2 C-HNS），然后可控地同时还原和碳化MoO 3纳米片，以进行有效的析氢反应（HER）催化在酸性和碱性条件下。在原子级薄的钼Mo物种/沫2 C-HNS不仅保证电子的快速传输，但也可优化β-Mo的电子构型2 C.此外，丰富的Mo /β-沫2纳米级的C异质界面提供了大量额外的异质催化位点。因此，获得了在89 MHV的过电势下的HER电催化性能，以驱动0.5 MH 2 SO 4中的电流密度为10 mA / cm 2。引人注目的是，稳定的计时电流电解20小时，以及令人印象深刻的循环稳定性（在4000次扫描中可忽略不计的超电势衰减）证明了其在酸性环境中的显着耐久性。这些发现凸显了Mo / Mo 2 C-HNS催化剂作为高效，稳定的无HER的无贵金属电催化剂的潜力。
更新日期：2018-01-11
中文翻译：
Mo / Mo 2 C异质纳米片中双相界面的原位工程用于促进氢释放反应
通过NaCl模板辅助合成路线成功地制备了二维Mo / Mo 2 C异质纳米片（Mo / Mo 2 C-HNS），然后可控地同时还原和碳化MoO 3纳米片，以进行有效的析氢反应（HER）催化在酸性和碱性条件下。在原子级薄的钼Mo物种/沫2 C-HNS不仅保证电子的快速传输，但也可优化β-Mo的电子构型2 C.此外，丰富的Mo /β-沫2纳米级的C异质界面提供了大量额外的异质催化位点。因此，获得了在89 MHV的过电势下的HER电催化性能，以驱动0.5 MH 2 SO 4中的电流密度为10 mA / cm 2。引人注目的是，稳定的计时电流电解20小时，以及令人印象深刻的循环稳定性（在4000次扫描中可忽略不计的超电势衰减）证明了其在酸性环境中的显着耐久性。这些发现凸显了Mo / Mo 2 C-HNS催化剂作为高效，稳定的无HER的无贵金属电催化剂的潜力。
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