Journal
NANOTECHNOLOGY
Volume 31, Issue 22, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/ab767a
Keywords
nanostructured; MoO2; MoS2; MoP; heterojunction; overpotential; HER
Funding
- National Natural Science Foundation of China [21601018, 51572034, 51573023, 51802027, 51976015]
- Science and Technology Research Project of the Education Department of Jilin Province during the 13th five-year-plan period [2016-359]
- Science and Technology Development Planning Project of Jilin Province [20190103035JH, 20180520177JH]
- Project of Education Department in Jilin Province [20190586KJ]
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Electrocatalytic production of hydrogen from water is considered to be a promising and sustainable strategy. In this work, the low-cost nanostructured MoO2/MoS2/MoP heterojunction is successfully synthesized by phosphorization of the pre-prepared urchin-like MoO2/MoS2 nanospheres as the stable, highly efficient electrocatalysis for the hydrogen evolution reaction (HER). The MoO2/MoS2/MoP-800 (MoO2/MoS2 nanospheres are phosphated at 800 degrees C) displays a catalytic ability for the HER with an overpotential of 135 mV to achieve 10 mA cm(-2) and a Tafel slope of 67 mV dec(-1) in 0.5 M H2SO4, which is superior to MoO2/MoS2 nanospheres (200 degrees C; 24 h), MoO2/MoS2/MoP-700 (MoO2/MoS2 nanospheres are phosphated at 700 degrees C) and MoO2/MoS2/MoP-900 (MoO2/MoS2 nanospheres are phosphated at 900 degrees C). Meanwhile, the catalyst exhibits superior properties for HER with an overpotential of 145 mV to achieve 10 mA cm(-2) and a Tafel slope of 71 mV dec(-1) in 1 M KOH solution. Detailed characterizations reveal that the improved HER performances are significantly related to P-doping and the spherical nanostructure. This work not only provides a low-cost selective for electrocatalytic production of hydrogen, but also serves as a guide to optimize the composition and structure of nanocomposites.
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