Cobalt phosphide based nanostructures as bifunctional electrocatalysts for low temperature alkaline water splitting [electronic resource]

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Ngôn ngữ: eng

Ký hiệu phân loại: 666.3 Pottery

Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. National Nuclear Security Administration ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2016

Mô tả vật lý: Size: 6 p. : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 255933

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Cobalt phosphide based thin films and nanoparticles were prepared by the thermal phosphidation of spinel Co
3
O
4
precursor films and nanoparticles, respectively. CoP films were prepared with overall retention of the Co
3
O
4
nanoplatelet morphology while the spherical/cubic Co
3
O
4
and Ni
0.15
Co
2.85
O
4
nanoparticles were converted to nanorods or nanoparticles, respectively. The inclusion of nickel in the nanoparticles resulted in a 2.5 fold higher surface area leading to higher gravimetric performance. In each case high surface area structures were obtained with CoP as the primary phase. All materials were found to act as effective bifunctional electrocatalysts for both the HER and the OER and compared well to commercial precious metal benchmark materials in alkaline electrolyte. As a result, a symmetrical water electrolysis cell prepared from the CoP-based film operated at a low overpotential of 0.41-0.51 V.

1. 30 direct energy conversion
2. 36 materials science

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