Rhenium doping induced structural transformation in mono-layered MoS2 with improved catalytic activity for hydrogen evolution reaction

Rhenium doping induced structural transformation in mono-layered MoS2 with improved catalytic activity for hydrogen evolution reaction
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铼掺杂诱导单层MoS2结构转变,提高析氢反应催化活性

DOI:
10.1088/1361-6463/aa85c9
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发表时间:
2017-09
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
通讯作者:
Fu Yong Qing
Fu Yong Qing
中科院分区:
其他
文献类型:
--
作者:
Shi Wenwu;Wang Zhiguo;Fu Yong Qing

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本文报道了一种新的设计方法,以提高催化剂的催化活性的二维过渡金属二硫属化物通过元素掺杂诱导结构转变。以密度泛函理论为例,研究了Re掺杂对单层三棱柱(2 H)MoS 2结构稳定性、相变和催化活性的影响.结果表明,当x大于0.4时,2 H-Mo 1 − xRexS 2转变为1 T ′-Mo 1 − xRexS 2 MoS 2,Re向Mo的电子转移是导致这种结构转变的主要原因。1 T ′-Mo 1 − xRexS 2在0.75 μ x ≤ 0.94时表现出较好的催化活性。
This paper reports a new design methodology to improve catalytic activities of catalysts based on 2D transition metal dichalcogenides through elemental doping which induces structural transformations. Effects of rhenium (Re) doping on structural stability/phase transformation and catalytic activity of mono-layered trigonal prismatic (2H) MoS2 were investigated using density functional theory as one example. Results show that 2H-Mo1−xRexS2 transforms into 1T′-Mo1−xRexS2MoS2 as the value of x is larger than 0.4, and the transfer of the electron from Re to Mo is identified as the main reason for this structural transformation. The 1T′-Mo1−xRexS2 shows a good catalytic activity for the hydrogen evolution reaction when 0.75  ⩽  x  ⩽  0.94.
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