Solar Hydrogen Generation by Nanoscale p-n Junction of p-type Molybdenum Disulfide/n-type Nitrogen-Doped Reduced Graphene Oxide
Solar Hydrogen Generation by Nanoscale p-n Junction of p-type Molybdenum Disulfide/n-type Nitrogen-Doped Reduced Graphene Oxide
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DOI：
10.1021/ja404851s
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发表时间：
2013-07-17
影响因子：
15
通讯作者：
Wu, Nianqiang
中科院分区：
文献类型：
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作者：
Meng, Fanke;Li, Jiangtian;Wu, Nianqiang
二硫化钼(MoS2)是一种很有前途的太阳能制氢候选材料，但它单独的光催化活性可以忽略不计。在本工作中，在n型掺氮还原氧化石墨烯(n-rGO)纳米片上沉积了5-20nin尺寸的p型MoS_2纳米片，在每个n-rGO纳米片上形成了多个纳米尺度的p-n结。p-MoS_2/n-rGO异质结在从紫外光到近红外光的波长范围内对析氢反应(HER)显示出显著的光催化活性。光电化学测量表明，p-MoS_2/n-rGO结极大地促进了电荷的产生，抑制了电荷复合，这是促进太阳能产氢的主要原因。P-MoS_2/n-RGO是一种地球资源丰富、环境友好的太阳能制氢光催化剂。
Molybdenum disulfide (MoS2) is a promising candidate for solar hydrogen generation but it alone has negligible photocatalytic activity. In this work, 5-20 nin sized p-type MoS2 nanoplatelets are deposited on the n-type nitrogen-doped reduced graphene oxide (n-rGO) nanosheets to form multiple nanoscale p-n junctions in each rGO nanosheet The p-MoS2/n-rGO heterostructure shows significant photocatalytic activity toward the hydrogen evolution reaction (HER) in the wavelength range from the ultraviolet light through the near-infrared light. The photoelectrochemical measurement shows that the p-MoS2/n-rGO junction greatly enhances the charge generation and suppresses the charge recombination, which is responsible for enhancement of solar hydrogen generation. The p-MoS2/n-rGO is an earth-abundant and environmentally benign photocatalyst for solar hydrogen generation.